7Baggers

Kronos Worldwide, Inc
(NYSE:KRO) 

KRO stock logo

Kronos Worldwide, Inc. produces and markets titanium dioxide pigments (TiO2) in Europe, North America, the Asia Pacific, and internationally. The company produces TiO2 in two crystalline forms, rutile and anatase to impart whiteness, brightness, opacity, and durability for various products, includin...

Founded: 1916
Full Time Employees: 2,200
Sector: Basic Materials
Industry: Specialty Chemicals
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    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-11-05 2007-06-30 2007-03-31 2006-12-31 
                                                                                  
      net sales
    		509,800,000 418,300,000 456,900,000 494,400,000 489,800,000 423,100,000 484,700,000 500,500,000 478,800,000 400,100,000 396,900,000 443,200,000 426,300,000 342,400,000 459,600,000 565,300,000 562,900,000 496,000,000 499,800,000 478,600,000 465,000,000 414,900,000 416,900,000 386,000,000 421,000,000 372,700,000 437,400,000 484,500,000 436,500,000 349,400,000 410,300,000 471,800,000 430,400,000 453,300,000 464,500,000 441,400,000 369,800,000 333,700,000 356,100,000 356,100,000 318,400,000 287,000,000 336,500,000 360,200,000 365,100,000 373,500,000 414,800,000 443,500,000 420,100,000 368,600,000 419,100,000 481,100,000 463,600,000 396,800,000 472,900,000 545,300,000 561,300,000 437,400,000 548,000,000 537,500,000 420,400,000 373,300,000 376,600,000 380,100,000 319,700,000 301,800,000 310,100,000 282,000,000 248,000,000 246,900,000 345,600,000 391,900,000 332,500,000 310,400,000 343,300,000 342,600,000 314,000,000  
      yoy
    		4.08% -1.13% -5.74% -1.22% 2.30% 5.75% 22.12% 12.93% 12.32% 16.85% -13.64% -21.60% -24.27% -30.97% -8.04% 18.12% 21.05% 19.55% 19.88% 23.99% 10.45% 11.32% -4.69% -20.33% -3.55% 6.67% 6.60% 2.69% 1.42% -22.92% -11.67% 6.89% 16.39% 35.84% 30.44% 23.95% 16.14% 16.27% 5.82% -1.14% -12.79% -23.16% -18.88% -18.78% -13.09% 1.33% -1.03% -7.82% -9.38% -7.11% -11.38% -11.77% -17.41% -9.28% -13.70% 1.45% 33.52% 17.17% 45.51% 41.41% 31.50% 23.69% 21.44% 34.79% 28.91% 22.24% -10.27% -28.04% -25.41% -20.46% 0.67% 14.39% 5.89%      
      qoq
    		21.87% -8.45% -7.58% 0.94% 15.76% -12.71% -3.16% 4.53% 19.67% 0.81% -10.45% 3.96% 24.50% -25.50% -18.70% 0.43% 13.49% -0.76% 4.43% 2.92% 12.08% -0.48% 8.01% -8.31% 12.96% -14.79% -9.72% 11.00% 24.93% -14.84% -13.04% 9.62% -5.05% -2.41% 5.23% 19.36% 10.82% -6.29% 0.00% 11.84% 10.94% -14.71% -6.58% -1.34% -2.25% -9.96% -6.47% 5.57% 13.97% -12.05% -12.89% 3.77% 16.83% -16.09% -13.28% -2.85% 28.33% -20.18% 1.95% 27.85% 12.62% -0.88% -0.92% 18.89% 5.93% -2.68% 9.96% 13.71% 0.45% -28.56% -11.81% 17.86% 7.12% -9.58% 0.20% 9.11%   
      cost of sales
    		426,500,000 421,900,000 409,900,000 431,600,000 383,000,000 336,700,000 383,500,000 400,300,000 407,300,000 344,500,000 362,500,000 399,100,000 395,500,000 305,100,000 375,600,000 444,800,000 413,600,000 377,500,000 376,800,000 369,600,000 369,300,000 328,200,000 336,300,000 290,200,000 332,900,000 293,000,000 349,700,000 375,000,000 327,200,000 252,900,000 291,200,000 300,000,000 255,600,000 279,800,000 312,300,000 311,600,000 266,400,000 248,100,000 280,600,000 300,600,000 278,000,000 261,800,000 293,300,000 313,700,000 287,700,000 293,800,000 319,100,000 349,700,000 339,600,000 317,100,000 371,900,000 471,500,000 459,700,000 347,200,000 386,900,000 382,000,000 299,800,000 243,300,000 337,100,000 340,500,000 274,000,000 269,900,000 280,400,000 294,900,000 259,200,000 249,300,000 250,600,000 267,900,000 243,900,000 193,000,000 295,200,000 332,700,000 275,400,000 259,900,000 276,400,000 279,000,000 243,600,000  
      gross margin
    		83,300,000 -3,600,000 47,000,000 62,800,000 106,800,000 86,400,000 101,200,000 100,200,000 71,500,000 55,600,000 34,400,000 44,100,000 30,800,000 37,300,000 84,000,000 120,500,000 149,300,000 118,500,000 123,000,000 109,000,000 95,700,000 86,700,000 80,600,000 95,800,000 88,100,000 79,700,000 87,700,000 109,500,000 109,300,000 96,500,000 119,100,000 171,800,000 174,800,000 173,500,000 152,200,000 129,800,000 103,400,000 85,600,000 75,500,000 55,500,000 40,400,000 25,200,000 43,200,000 46,500,000 77,400,000 79,700,000 95,700,000 93,800,000 80,500,000 51,500,000 47,200,000 9,600,000 3,900,000 49,600,000 86,000,000 163,300,000 261,500,000 194,100,000 210,900,000 197,000,000 146,400,000 103,400,000 96,200,000 85,200,000 60,500,000 52,500,000 59,500,000 14,100,000 4,100,000 53,900,000 50,400,000 59,200,000 57,100,000 50,500,000 66,900,000 63,600,000 70,400,000  
      yoy
    		-22.00% -104.17% -53.56% -37.33% 49.37% 55.40% 194.19% 127.21% 132.14% 49.06% -59.05% -63.40% -79.37% -68.52% -31.71% 10.55% 56.01% 36.68% 52.61% 13.78% 8.63% 8.78% -8.10% -12.51% -19.40% -17.41% -26.36% -36.26% -37.47% -44.38% -21.75% 32.36% 69.05% 102.69% 101.59% 133.87% 155.94% 239.68% 74.77% 19.35% -47.80% -68.38% -54.86% -50.43% -3.85% 54.76% 102.75% 877.08% 1964.10% 3.83% -45.12% -94.12% -98.51% -74.45% -59.22% -17.11% 78.62% 87.72% 119.23% 131.22% 141.98% 96.95% 61.68% 504.26% 1375.61% -2.60% 18.06% -76.18% -92.82% 6.73% -24.66% -6.92% -18.89%      
      qoq
    		-2413.89% -107.66% -25.16% -41.20% 23.61% -14.62% 1.00% 40.14% 28.60% 61.63% -22.00% 43.18% -17.43% -55.60% -30.29% -19.29% 25.99% -3.66% 12.84% 13.90% 10.38% 7.57% -15.87% 8.74% 10.54% -9.12% -19.91% 0.18% 13.26% -18.98% -30.68% -1.72% 0.75% 13.99% 17.26% 25.53% 20.79% 13.38% 36.04% 37.38% 60.32% -41.67% -7.10% -39.92% -2.89% -16.72% 2.03% 16.52% 56.31% 9.11% 391.67% 146.15% -92.14% -42.33% -47.34% -37.55% 34.72% -7.97% 7.06% 34.56% 41.59% 7.48% 12.91% 40.83% 15.24% -11.76% 321.99% 243.90% -92.39% 6.94% -14.86% 3.68% 13.07% -24.51% 5.19% -9.66%   
      gross margin %
    		16.34% -0.86% 10.29% 12.70% 21.80% 20.42% 20.88% 20.02% 14.93% 13.90% 8.67% 9.95% 7.22% 10.89% 18.28% 21.32% 26.52% 23.89% 24.61% 22.77% 20.58% 20.90% 19.33% 24.82% 20.93% 21.38% 20.05% 22.60% 25.04% 27.62% 29.03% 36.41% 40.61% 38.27% 32.77% 29.41% 27.96% 25.65% 21.20% 15.59% 12.69% 8.78% 12.84% 12.91% 21.20% 21.34% 23.07% 21.15% 19.16% 13.97% 11.26% 2.00% 0.84% 12.50% 18.19% 29.95% 46.59% 44.38% 38.49% 36.65% 34.82% 27.70% 25.54% 22.42% 18.92% 17.40% 19.19% 5.00% 1.65% 21.83% 14.58% 15.11% 17.17% 16.27% 19.49% 18.56% 22.42%  
      selling, general and administrative expense
    		63,600,000 59,900,000 61,600,000 62,100,000 61,600,000 51,200,000 62,300,000 57,900,000 54,200,000 54,300,000 53,600,000 50,100,000 53,200,000 47,700,000 59,000,000 63,200,000 61,400,000 63,800,000 64,200,000 62,900,000 58,000,000 56,800,000 55,600,000 52,700,000 53,500,000 55,700,000 56,900,000 57,900,000 57,700,000 54,600,000 57,300,000 58,000,000 58,400,000 54,800,000 53,000,000 52,600,000 46,800,000 42,900,000 43,600,000 45,000,000 41,100,000 40,700,000 42,300,000 51,600,000 43,400,000 46,000,000 47,700,000 49,100,000 49,100,000 47,000,000 44,700,000 49,300,000 49,400,000 44,200,000 43,300,000 47,100,000 48,800,000 50,300,000 49,900,000 51,100,000 43,700,000 43,400,000 41,900,000 41,300,000 40,100,000 40,100,000 39,200,000 34,700,000 34,300,000 33,200,000 43,900,000 47,000,000 43,300,000 40,200,000 41,800,000 40,700,000 39,400,000  
      other operating expense:
    		                                                                              
      currency transactions
    		-5,400,000 2,200,000 -1,900,000 9,400,000 -4,300,000 -3,300,000 2,900,000 -3,800,000 5,800,000 -3,200,000 -3,900,000 3,100,000 5,400,000 -5,600,000 6,700,000 11,900,000 -1,500,000 400,000 1,200,000 500,000 -500,000 -7,200,000 -2,900,000 -6,100,000 12,200,000 -3,600,000 5,800,000 -1,100,000 900,000 5,900,000 -600,000 9,800,000                                               
      other operating expense
    		-1,700,000 -1,975,000 -2,700,000 -2,700,000 -2,500,000 -2,275,000 -2,900,000 -2,600,000 -3,600,000 -1,825,000 -2,200,000 -3,800,000 -1,300,000 -2,000,000 -900,000 -4,000,000 -3,100,000 -2,175,000 -2,700,000 -2,800,000 -3,200,000 -2,525,000 -2,800,000 -4,000,000 -3,300,000 -2,750,000 -3,500,000 -4,000,000 -3,500,000 -2,675,000 -3,100,000 -3,700,000 -3,900,000 -2,750,000 -3,300,000 -3,600,000 -4,100,000 -1,675,000 -2,900,000 -1,900,000 -1,900,000 -2,950,000 -3,400,000 -5,000,000 -3,400,000 -2,175,000 -3,000,000 -3,000,000 -2,700,000 -11,875,000 -39,200,000 -5,100,000 -3,200,000 -3,150,000 -3,200,000 -6,000,000 -3,400,000 -1,700,000 -2,500,000 -2,600,000  -1,475,000 -2,500,000 -2,000,000  -1,425,000 -1,900,000 -2,500,000     4,100,000 -1,000,000 -3,000,000  1,700,000  
      income from operations
    		12,600,000 -63,100,000 -19,200,000 7,400,000 38,400,000 28,600,000 38,900,000 35,900,000 19,500,000 -5,700,000 -25,300,000 -6,700,000 -18,300,000 -19,700,000 30,800,000 65,200,000 83,300,000 52,000,000 57,300,000 43,800,000 34,000,000 20,400,000 19,300,000 33,000,000 43,500,000 17,200,000 33,100,000 46,500,000 49,000,000 44,600,000 58,100,000 119,900,000 107,500,000 116,400,000 91,600,000 70,100,000 52,300,000 42,900,000 28,000,000 10,500,000 -300,000 -19,700,000 -3,200,000 -10,400,000 32,200,000 31,500,000 47,900,000 44,300,000 26,000,000 -1,000,000 -37,000,000 -47,700,000 -46,900,000 1,100,000 38,500,000 110,600,000 209,400,000 143,300,000 156,600,000 144,200,000 102,400,000 60,900,000 57,000,000 38,800,000 21,700,000   -21,900,000  19,900,000 7,900,000 9,700,000 9,700,000 9,900,000 22,100,000 23,600,000 29,300,000  
      yoy
    		-67.19% -320.63% -149.36% -79.39% 96.92% -601.75% -253.75% -635.82% -206.56% -71.07% -182.14% -110.28% -121.97% -137.88% -46.25% 48.86% 145.00% 154.90% 196.89% 32.73% -21.84% 18.60% -41.69% -29.03% -11.22% -61.43% -43.03% -61.22% -54.42% -61.68% -36.57% 71.04% 105.54% 171.33% 227.14% 567.62% -17533.33% -317.77% -975.00% -200.96% -100.93% -162.54% -106.68% -123.48% 23.85% -3250.00% -229.46% -192.87% -155.44% -190.91% -196.10% -143.13% -122.40% -99.23% -75.42% -23.30% 104.49% 135.30% 174.74% 271.65% 371.89%   -277.17%    -325.77%  101.01% -64.25% -58.90% -66.89%      
      qoq
    		-119.97% 228.65% -359.46% -80.73% 34.27% -26.48% 8.36% 84.10% -442.11% -77.47% 277.61% -63.39% -7.11% -163.96% -52.76% -21.73% 60.19% -9.25% 30.82% 28.82% 66.67% 5.70% -41.52% -24.14% 152.91% -48.04% -28.82% -5.10% 9.87% -23.24% -51.54% 11.53% -7.65% 27.07% 30.67% 34.03% 21.91% 53.21% 166.67% -3600.00% -98.48% 515.63% -69.23% -132.30% 2.22% -34.24% 8.13% 70.38% -2700.00% -97.30% -22.43% 1.71% -4363.64% -97.14% -65.19% -47.18% 46.13% -8.49% 8.60% 40.82% 68.14% 6.84% 46.91% 78.80%      151.90% -18.56% 0.00% -2.02% -55.20% -6.36% -19.45%   
      operating margin %
    		2.47% -15.08% -4.20% 1.50% 7.84% 6.76% 8.03% 7.17% 4.07% -1.42% -6.37% -1.51% -4.29% -5.75% 6.70% 11.53% 14.80% 10.48% 11.46% 9.15% 7.31% 4.92% 4.63% 8.55% 10.33% 4.61% 7.57% 9.60% 11.23% 12.76% 14.16% 25.41% 24.98% 25.68% 19.72% 15.88% 14.14% 12.86% 7.86% 2.95% -0.09% -6.86% -0.95% -2.89% 8.82% 8.43% 11.55% 9.99% 6.19% -0.27% -8.83% -9.91% -10.12% 0.28% 8.14% 20.28% 37.31% 32.76% 28.58% 26.83% 24.36% 16.31% 15.14% 10.21% 6.79% 0% 0% -7.77% 0% 8.06% 2.29% 2.48% 2.92% 3.19% 6.44% 6.89% 9.33%  
      other income:
    		                                                                              
      interest and dividend income
    		200,000 300,000 200,000 300,000 400,000 1,000,000 1,100,000 2,100,000 1,300,000 1,900,000 1,500,000 1,500,000 2,000,000 3,000,000 1,400,000 600,000 100,000 200,000  100,000 100,000 300,000 100,000 200,000 1,200,000 1,500,000 1,400,000 1,700,000 2,100,000 1,800,000 1,500,000 1,200,000 1,000,000 700,000 400,000 100,000 200,000 100,000 100,000 200,000 200,000 200,000 300,000 100,000 200,000 300,000 200,000 300,000 200,000 300,000 300,000 300,000 300,000 2,400,000 2,300,000 2,000,000 2,300,000 2,500,000 1,100,000 1,700,000 1,700,000                  
      marketable equity securities
    		300,000 -500,000 -100,000  -1,000,000 -1,400,000 2,200,000 100,000 300,000 300,000  -600,000 -700,000 -500,000 -2,900,000 2,300,000 100,000 800,000 -100,000 500,000 800,000 200,000 400,000 -200,000 -1,500,000  -1,900,000 1,200,000 600,000 -600,000 -4,300,000 -2,200,000                                               
      other components of net periodic pension and opeb cost
    		-800,000 -10,500,000 -500,000 -600,000 -500,000 -600,000 -400,000 -300,000 -300,000 -1,600,000 -1,000,000 -2,200,000 -900,000 -3,700,000 -2,900,000 -3,100,000 -3,200,000 -3,600,000 -4,300,000 -4,300,000 -4,300,000 -5,000,000 -5,000,000 -4,700,000 -4,700,000 -3,800,000 -3,800,000 -3,800,000 -3,800,000 -3,700,000 -3,700,000 -3,800,000 -3,800,000                                              
      interest expense
    		-14,300,000 -14,500,000 -14,100,000 -12,800,000 -11,600,000 -12,100,000 -11,800,000 -9,800,000 -9,200,000 -4,300,000 -4,300,000 -4,300,000 -4,200,000 -3,900,000 -4,200,000 -4,300,000 -4,500,000 -4,600,000 -4,800,000 -5,200,000 -5,000,000 -4,900,000 -4,900,000 -4,600,000 -4,600,000 -4,600,000 -4,600,000 -4,700,000 -4,800,000 -4,800,000 -4,900,000 -5,000,000 -4,800,000 -4,500,000 -5,000,000 -4,800,000 -4,700,000 -5,100,000 -5,200,000 -5,100,000 -5,100,000 -5,200,000 -4,300,000 -4,400,000 -4,600,000 -4,400,000 -3,900,000 -4,700,000 -4,000,000 -3,000,000 -4,500,000 -5,700,000 -6,400,000 -6,700,000 -7,000,000 -6,700,000 -6,300,000 -6,500,000 -8,100,000 -8,500,000 -9,600,000 -9,600,000 -9,000,000 -9,700,000 -10,400,000 -10,800,000 -10,500,000 -10,300,000 -9,700,000 -9,200,000 -11,300,000 -11,100,000 -10,600,000 -10,100,000 -10,000,000 -9,800,000 -9,500,000  
      income before income taxes
    		-2,000,000 -88,300,000 -29,100,000 -5,700,000 25,700,000 15,500,000 94,500,000 28,000,000 11,600,000 -9,400,000 -29,100,000 -12,300,000 -22,100,000 -24,800,000 22,200,000 60,700,000 75,800,000 44,800,000 48,100,000 34,900,000 25,600,000 11,000,000 9,900,000 23,700,000 35,400,000 12,900,000 24,200,000 40,900,000 43,100,000 37,300,000 46,700,000 110,100,000 99,700,000 112,600,000 79,900,000 65,400,000 47,800,000 37,900,000 22,900,000 5,600,000 -5,200,000 -24,700,000 -19,200,000 -14,700,000 27,800,000 27,400,000 44,200,000 39,900,000 22,200,000 -3,700,000 -43,500,000 -53,100,000 -59,600,000 -7,100,000 33,800,000 98,700,000 205,400,000 138,800,000 149,700,000 137,400,000 91,200,000 51,900,000 48,000,000 29,100,000 11,300,000   -32,100,000 -36,000,000     600,000 12,800,000 14,200,000 20,400,000  
      income tax expense
    		2,800,000 -5,500,000 7,900,000 3,500,000 7,600,000 28,700,000 22,700,000 8,500,000 3,500,000 -4,100,000 -8,700,000 -4,100,000 -6,900,000 -4,900,000 1,200,000 14,800,000 18,300,000 13,200,000 12,100,000 9,200,000 6,000,000 800,000 1,800,000 5,100,000 8,400,000 3,500,000 6,300,000 11,400,000 12,800,000 13,300,000 14,100,000 32,400,000 29,000,000 65,200,000 6,100,000 -131,100,000 11,000,000 14,700,000 700,000 3,900,000 -1,400,000 -4,300,000 -7,400,000 145,100,000 9,400,000 7,500,000 12,300,000 6,800,000 7,900,000 -6,600,000 -13,600,000 -19,200,000 -18,500,000 25,325,000 -1,400,000 34,200,000 68,500,000 35,775,000 63,800,000 48,400,000 30,900,000 -1,425,000 15,900,000 9,800,000  -4,375,000 2,100,000            
      net income
    		-4,800,000 -82,800,000 -37,000,000 -9,200,000 18,100,000 -13,200,000 71,800,000 19,500,000 8,100,000 -5,300,000 -20,400,000 -8,200,000 -15,200,000 -19,900,000 21,000,000 45,900,000 57,500,000 31,600,000 36,000,000 25,700,000 19,600,000 10,200,000 8,100,000 18,600,000 27,000,000 9,400,000 17,900,000 29,500,000 30,300,000 24,000,000 32,600,000 77,700,000 70,700,000 47,400,000 73,800,000 196,500,000 36,800,000 23,200,000 22,200,000 1,700,000 -3,800,000 -20,400,000 -11,800,000 -159,800,000 18,400,000 19,900,000 31,900,000 33,100,000 14,300,000 2,900,000 -29,900,000 -33,900,000 -41,100,000 -18,100,000 35,200,000 64,500,000 136,900,000 85,800,000 85,900,000 89,000,000 60,300,000 36,500,000 32,100,000 19,300,000 42,800,000 5,200,000 8,600,000 -21,800,000 -26,600,000 7,200,000 -3,600,000 5,800,000 -400,000 1,600,000 -81,200,000  12,900,000  
      yoy
    		-126.52% 527.27% -151.53% -147.18% 123.46% 149.06% -451.96% -337.80% -153.29% -73.37% -197.14% -117.86% -126.43% -162.97% -41.67% 78.60% 193.37% 209.80% 344.44% 38.17% -27.41% 8.51% -54.75% -36.95% -10.89% -60.83% -45.09% -62.03% -57.14% -49.37% -55.83% -60.46% 92.12% 104.31% 232.43% 11458.82% -1068.42% -213.73% -288.14% -101.06% -120.65% -202.51% -136.99% -582.78% 28.67% 586.21% -206.69% -197.64% -134.79% -116.02% -184.94% -152.56% -130.02% -121.10% -59.02% -27.53% 127.03% 135.07% 167.60% 361.14% 40.89% 601.92% 273.26% -188.53% -260.90% -27.78% -338.89% -475.86% 6550.00% 350.00% -95.57%  -103.10%      
      qoq
    		-94.20% 123.78% 302.17% -150.83% -237.12% -118.38% 268.21% 140.74% -252.83% -74.02% 148.78% -46.05% -23.62% -194.76% -54.25% -20.17% 81.96% -12.22% 40.08% 31.12% 92.16% 25.93% -56.45% -31.11% 187.23% -47.49% -39.32% -2.64% 26.25% -26.38% -58.04% 9.90% 49.16% -35.77% -62.44% 433.97% 58.62% 4.50% 1205.88% -144.74% -81.37% 72.88% -92.62% -968.48% -7.54% -37.62% -3.63% 131.47% 393.10% -109.70% -11.80% -17.52% 127.07% -151.42% -45.43% -52.89% 59.56% -0.12% -3.48% 47.60% 65.21% 13.71% 66.32% -54.91% 723.08% -39.53% -139.45% -18.05% -469.44% -300.00% -162.07% -1550.00% -125.00% -101.97%     
      net income margin %
    		-0.94% -19.79% -8.10% -1.86% 3.70% -3.12% 14.81% 3.90% 1.69% -1.32% -5.14% -1.85% -3.57% -5.81% 4.57% 8.12% 10.21% 6.37% 7.20% 5.37% 4.22% 2.46% 1.94% 4.82% 6.41% 2.52% 4.09% 6.09% 6.94% 6.87% 7.95% 16.47% 16.43% 10.46% 15.89% 44.52% 9.95% 6.95% 6.23% 0.48% -1.19% -7.11% -3.51% -44.36% 5.04% 5.33% 7.69% 7.46% 3.40% 0.79% -7.13% -7.05% -8.87% -4.56% 7.44% 11.83% 24.39% 19.62% 15.68% 16.56% 14.34% 9.78% 8.52% 5.08% 13.39% 1.72% 2.77% -7.73% -10.73% 2.92% -1.04% 1.48% -0.12% 0.52% -23.65% 0% 4.11%  
      net income per basic and diluted share
    		-40,000 -720,000 -320,000 -80,000 160,000 -110,000 620,000 170,000 70,000 -50,000 -180,000 -70,000 -130,000 -180,000 180,000 400,000 500,000 280,000 310,000 220,000 170,000 90,000 70,000 160,000 230,000 80,000 160,000 250,000 260,000 210,000 280,000 670,000 610,000 410,000 640,000 1,700,000 320,000 200,000 190,000 10,000 -30,000 -180,000 -100,000 -1,380,000 160,000 180,000 280,000 290,000 120,000 30,000 -260,000 -290,000 -350,000 -150,000 300,000 560,000 1,180,000 740,000 740,000 770,000 1,040,000 670,000 660,000 390,000 870,000 110,000 170,000 -450,000  140,000 -70,000  -10,000      
      weighted-average shares used for eps calculation
    		115,000,000 115,000,000 115,000,000 115,000,000 115,000,000 115,000,000 115,000,000 115,000,000 115,000,000 115,100,000 115,000,000 115,100,000 115,300,000 115,500,000 115,500,000 115,500,000 115,500,000 115,500,000 115,500,000 115,500,000 115,500,000 115,600,000 115,500,000 115,500,000 115,600,000 115,800,000 115,700,000 115,900,000 115,900,000 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9 115.9  115.9 115.9 115.9  115.9 115.9  115,900,000 115.9 115.9                       
      other operating income:
    		                                                                              
      gain on remeasurement of investment in tio2 manufacturing joint venture
    		      64,500,000                                                                        
      gain on remeasurement of earn-out liability
    		  4,600,000                                                                            
      insurance settlement gain
    		                        1,500,000                                                      
      loss on prepayment of debt
    		                                  -7,100,000                -2,300,000  -6,600,000   -7,200,000     -3,300,000                  
      cash dividends per share
    		                             0.17 0.17 0.17 0.17 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.113 0.15 0.15 0.15 0.231 0.15 0.15 1.25         0.188 0.25 0.25  0.188 0.25 0.25   
      currency transaction losses
    		                                -5,000,000                 -350,000 -300,000                            
      securities transactions
    		                                -200,000          -12,000,000                                    
      currency transaction gains
    		                                 500,000 -4,300,000 -3,500,000 -200,000 2,300,000 -1,000,000 1,900,000 2,300,000 -700,000 -700,000 -300,000 1,600,000 1,200,000 2,900,000 2,600,000 -2,700,000   -2,900,000 1,800,000 -500,000 -1,000,000 400,000 100,000 2,600,000 -1,900,000 900,000 1,400,000 3,000,000 5,200,000 -3,100,000 2,600,000 800,000 2,700,000 1,200,000 5,300,000 900,000 2,600,000 -500,000       
      weighted-average shares outstanding used in the calculation of net income per share
    		                                                    115.9    115.9                      
      gain on prepayment of debt
    		                                                     -1,800,000    -800,000 100,000                    
      basic and diluted weighted-average shares used in the calculation of net income per share
    		                                                         115.9 115.9 115.9 57.9 50.4 49 49 49   49    49    49 49  
      other operating income
    		                                                            -1,700,000    -1,300,000    -1,400,000 -1,225,000 -1,200,000 -2,000,000    700,000   
      interest income
    		                                                             25,000    25,000 100,000 100,000  225,000 300,000 200,000 400,000 425,000 700,000 400,000 600,000  
      income tax benefit
    		                                                                -31,500,000   -10,300,000 -9,400,000          
      income (loss) from operations
    		                                                                 11,200,000 21,100,000  -26,300,000          
      income (loss) before income taxes
    		                                                                 500,000 10,700,000   -1,200,000 -3,100,000 -1,200,000 -500,000      
      basic and diluted weighted-average shares used in the calculation of net income (loss) per share
    		                                                                 49 49  49 49 49  49 49 49    
      net loss per basic and diluted share
    		                                                                    -540,000          
      cash dividend per share
    		                                                                        0.25    0.25  
      provision for income taxes
    		                                                                     3,600,000 500,000 -7,000,000 -100,000 28,925,000 94,000,000 14,200,000 7,500,000  
      net income per basic and diluted shares
    		                                                                       120,000       
      basic and diluted net income per share
    		                                                                         -0.35 -1.66  0.26  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-11-05 2007-06-30 2007-03-31 2006-12-31 
                                                                                    
        current assets:
      		                                                                              
        cash and cash equivalents
      		25,700,000 33,200,000 27,700,000 18,900,000 20,500,000 106,700,000 94,800,000 133,800,000 120,700,000 194,700,000 155,300,000 169,400,000 177,800,000 327,800,000 338,500,000 371,200,000 350,000,000 406,000,000 373,500,000 363,800,000 373,600,000 355,300,000 348,400,000 341,400,000 341,500,000 390,800,000 385,800,000 328,600,000 339,500,000 373,300,000 432,300,000 431,900,000 364,600,000 322,000,000 316,700,000 114,100,000 89,800,000 50,700,000 92,100,000 79,200,000 55,500,000 92,500,000 126,800,000 115,700,000 121,400,000 167,700,000 151,200,000 177,900,000 179,000,000 53,800,000 59,800,000 102,000,000 102,200,000 282,700,000 110,900,000 91,600,000 47,900,000 82,500,000 112,100,000 72,200,000 126,400,000  46,400,000 34,100,000 22,800,000  40,400,000 73,900,000 27,600,000  30,300,000 17,100,000 26,200,000  86,900,000 40,900,000 54,600,000 102,000 
        restricted cash
      		2,500,000 3,800,000 3,300,000 3,400,000 3,200,000 3,300,000 3,100,000 1,700,000 1,600,000 2,200,000 1,600,000 1,700,000 1,600,000 2,000,000 1,500,000 1,600,000 1,800,000 2,100,000 1,700,000 1,800,000 1,700,000 2,000,000 4,700,000 1,500,000 1,200,000 1,500,000 1,100,000 900,000 1,100,000 1,400,000 1,100,000 1,300,000 1,300,000 1,700,000 1,300,000 1,300,000 1,100,000 1,600,000 1,200,000 1,400,000 1,300,000 1,800,000 1,400,000 1,800,000 1,500,000 2,200,000 2,000,000 2,300,000 2,100,000 2,600,000 1,900,000 2,200,000 1,900,000 2,700,000 1,900,000 2,000,000 1,800,000 1,900,000 1,500,000 1,800,000 1,300,000  1,200,000 1,200,000 1,100,000  1,100,000 1,000,000 1,000,000  1,200,000 1,600,000 1,200,000  1,100,000 1,300,000 900,000  
        accounts and other receivables
      		374,400,000 284,400,000 334,300,000 347,100,000 355,400,000 291,000,000 366,500,000 370,600,000 348,700,000 295,200,000 299,800,000 308,000,000 302,000,000 252,400,000 357,500,000 404,300,000 416,400,000 360,700,000 384,000,000 347,800,000 338,300,000 319,500,000 314,500,000 320,500,000 330,400,000 302,500,000 348,300,000 400,600,000 354,000,000 299,500,000 340,700,000 372,300,000 390,200,000 319,100,000 355,400,000 334,800,000 273,900,000 241,100,000 267,800,000 272,200,000 252,900,000 218,300,000 248,300,000 286,100,000 286,300,000 260,200,000 329,900,000 347,600,000 331,500,000 268,300,000 336,900,000 360,500,000 387,000,000 285,800,000 316,300,000 437,900,000 432,300,000 270,300,000 333,400,000 358,000,000 295,900,000  254,100,000 249,400,000 218,300,000  220,500,000 209,600,000 187,500,000  260,500,000 310,200,000 273,000,000  267,100,000 262,600,000 241,600,000  
        inventories
      		549,300,000 628,600,000 659,100,000 683,500,000 699,800,000 656,700,000 548,600,000 447,200,000 475,800,000 564,600,000 497,800,000 540,700,000 612,700,000 608,700,000 511,700,000 435,000,000 464,200,000 432,300,000 423,600,000 429,400,000 473,000,000 519,000,000 504,200,000 498,400,000 479,400,000 503,000,000 434,900,000 488,600,000 495,800,000 497,900,000 446,200,000 412,000,000 430,200,000 382,300,000 335,300,000 341,800,000 360,700,000 343,500,000 317,100,000 338,100,000 377,500,000 387,200,000 385,400,000 399,200,000 394,000,000 423,600,000 399,600,000 398,500,000 405,000,000 416,600,000 393,400,000 449,800,000 531,300,000 638,300,000 604,200,000 641,300,000 585,000,000 444,200,000 336,700,000 308,800,000 327,200,000  251,500,000 239,600,000 276,500,000  256,000,000 248,200,000 294,600,000  301,900,000 310,600,000 332,100,000  288,600,000 294,700,000 303,300,000  
        prepaid expenses and other
      		36,600,000 41,100,000 46,000,000 34,700,000 47,100,000 47,000,000 54,800,000 33,900,000 37,900,000 43,400,000 45,200,000 35,900,000 41,000,000 48,600,000 47,600,000 35,800,000 47,100,000 38,500,000 36,300,000 16,300,000 13,600,000 19,000,000 16,900,000 9,200,000 10,900,000 15,000,000 16,800,000 11,600,000 12,700,000 16,300,000 18,100,000 13,000,000 9,200,000 10,000,000 12,500,000 8,000,000 8,800,000 10,000,000 12,300,000 6,500,000 8,000,000 8,500,000 10,300,000 9,700,000 7,700,000 8,200,000 10,800,000 8,100,000 10,900,000 9,100,000 12,900,000 6,900,000 9,000,000  11,500,000 6,100,000 6,700,000  7,400,000 4,800,000 6,900,000  11,700,000 6,700,000 9,500,000  10,800,000 6,300,000 9,100,000      10,500,000 8,400,000 7,000,000  
        total current assets
      		988,500,000 994,500,000 1,070,400,000 1,087,600,000 1,126,000,000 1,105,300,000 1,067,800,000 987,200,000 984,700,000 1,117,400,000 999,700,000 1,055,700,000 1,135,100,000 1,242,200,000 1,256,800,000 1,247,900,000 1,279,500,000 1,258,000,000 1,219,100,000 1,159,100,000 1,200,200,000 1,218,300,000 1,188,700,000 1,171,000,000 1,163,400,000 1,219,700,000 1,186,900,000 1,230,300,000 1,203,100,000 1,201,400,000 1,238,400,000 1,230,500,000 1,195,500,000 1,062,500,000 1,021,200,000 800,000,000 734,300,000 650,400,000 690,500,000 697,400,000 695,200,000 710,800,000 781,200,000 820,400,000 817,100,000 886,200,000 897,600,000 943,900,000 937,900,000 781,200,000 821,500,000 925,500,000 1,035,500,000 1,223,400,000 1,054,600,000 1,188,700,000 1,083,500,000 865,000,000 840,400,000 829,700,000 915,900,000 262,100,000 568,600,000 534,700,000 531,900,000 29,100,000 533,100,000 543,200,000 523,900,000 20,200,000 603,500,000 647,800,000 640,600,000 14,200,000 655,600,000 609,700,000 609,500,000 5,744,000 
        other assets:
      		                                                                              
        marketable securities
      		2,100,000 1,800,000 2,300,000 2,400,000 2,400,000 3,400,000 4,800,000 2,600,000 2,500,000 2,200,000 1,900,000 1,900,000 2,500,000 3,200,000 3,600,000 6,500,000 4,300,000 4,200,000 3,400,000 3,500,000 3,000,000 2,200,000 2,000,000 1,600,000 1,800,000 3,300,000 3,300,000 5,200,000 4,000,000 3,400,000 4,000,000 8,300,000 10,500,000 10,700,000 4,300,000 5,200,000 5,700,000 6,000,000 4,000,000 2,700,000 2,100,000 2,400,000 3,300,000 9,800,000 10,800,000 11,100,000 11,300,000 11,100,000 15,300,000 30,400,000 34,500,000  27,700,000     20,900,000 44,500,000 79,600,000 106,100,000                  
        operating lease right-of-use assets
      		19,000,000 19,900,000 21,000,000 21,500,000 21,000,000 20,600,000 22,000,000 22,100,000 21,800,000 22,700,000 21,000,000 21,600,000 21,300,000 21,500,000 20,300,000 19,300,000 21,500,000 19,900,000 21,800,000 23,300,000 24,600,000 26,100,000 26,800,000 26,700,000 27,000,000 29,000,000 30,100,000 32,000,000 33,100,000                                                  
        deferred income taxes
      		32,800,000 35,800,000 50,800,000 59,400,000 54,100,000 55,100,000 70,300,000 79,900,000 81,800,000 83,300,000 82,400,000 71,300,000 50,900,000 52,000,000 90,700,000 93,900,000 101,400,000 106,800,000 136,100,000 142,400,000 143,300,000 151,000,000 141,100,000 134,300,000 125,600,000 127,700,000 107,700,000 113,000,000 116,800,000 122,000,000 115,600,000 118,600,000 132,300,000 139,200,000 120,000,000 127,800,000 5,700,000 8,100,000 17,900,000 15,500,000 15,800,000 14,000,000 9,000,000 7,900,000 6,200,000 6,300,000 4,100,000 9,500,000 9,400,000 16,600,000 16,600,000 4,100,000 4,100,000 4,100,000 9,800,000 9,800,000 9,800,000 9,900,000 4,800,000 4,500,000 4,500,000 3,100,000 3,700,000 3,700,000 3,700,000 2,800,000 4,300,000 4,200,000 4,100,000 3,800,000 1,600,000 1,600,000 1,600,000 3,500,000 1,400,000 1,800,000 2,100,000 2,000 
        goodwill
      		2,600,000 2,600,000 2,600,000 2,600,000 2,600,000 2,600,000 2,600,000                                                                        
        other
      		35,300,000 32,400,000 31,500,000 30,300,000 29,600,000 27,700,000 28,200,000 14,800,000 13,300,000 13,300,000 13,600,000 12,800,000 13,400,000 13,300,000 12,000,000 13,200,000 14,700,000 14,100,000 11,100,000 11,000,000 7,100,000 6,500,000 6,400,000 5,900,000 5,600,000 5,300,000 3,300,000 3,600,000 4,100,000 3,600,000 5,300,000 5,300,000 6,600,000 5,500,000 3,600,000 3,000,000 2,000,000 2,200,000 2,700,000 2,900,000 3,100,000 3,100,000 8,500,000 9,400,000 9,300,000 11,100,000 16,800,000 18,500,000 25,400,000 20,500,000 25,000,000 24,600,000 25,100,000 29,100,000 23,300,000 20,800,000 18,100,000 16,700,000 10,800,000 12,500,000 9,400,000 1,100,000 9,000,000 9,000,000 10,400,000 400,000 11,500,000 10,700,000 11,200,000 2,400,000 19,600,000 20,800,000 20,100,000 500,000 18,900,000 18,300,000 18,400,000 325,000 
        total other assets
      		97,200,000 98,000,000 113,600,000 121,600,000 114,600,000 114,100,000 132,900,000 225,400,000 233,100,000 237,700,000 239,500,000 233,800,000 206,500,000 207,700,000 241,400,000 243,600,000 252,000,000 251,400,000 282,400,000 288,300,000 289,300,000 293,800,000 273,000,000 265,000,000 252,400,000 255,500,000 232,500,000 241,200,000 241,600,000 210,300,000 204,600,000 212,500,000 229,000,000 255,500,000 203,000,000 206,500,000 95,400,000 95,200,000 104,400,000 97,400,000 104,700,000 102,400,000 100,200,000 106,800,000 257,300,000 276,600,000 253,000,000 260,100,000 283,700,000 301,600,000 328,300,000 308,900,000 321,600,000 281,100,000 490,200,000 460,200,000 481,500,000 473,400,000 457,500,000 458,900,000 375,700,000 846,200,000 297,300,000 289,800,000 313,400,000 612,500,000 313,300,000 307,500,000 297,100,000 596,400,000 304,600,000 323,200,000 317,900,000 669,100,000 330,000,000 406,600,000 410,900,000 663,734,000 
        property and equipment:
      		                                                                              
        land
      		78,600,000 79,300,000 79,200,000 79,100,000 75,900,000 74,200,000 77,000,000 43,100,000 43,300,000 44,700,000 42,400,000 41,900,000 42,200,000 41,900,000 38,800,000 41,000,000 43,800,000 43,900,000 44,100,000 43,200,000 42,700,000 44,100,000 41,800,000 40,200,000 39,100,000 40,400,000 39,300,000 40,900,000 40,400,000 41,000,000 41,400,000 41,100,000 43,200,000 42,000,000 41,400,000 40,000,000 37,900,000 37,300,000 39,100,000 38,500,000 38,700,000 37,800,000 38,700,000 39,600,000 38,300,000 42,600,000 45,100,000 47,900,000 48,300,000 46,300,000 45,400,000 44,200,000 43,600,000 45,200,000 43,900,000 41,900,000 44,600,000 43,200,000 45,200,000 47,200,000 46,600,000  44,000,000 40,700,000 44,200,000  43,900,000 42,000,000 36,300,000  39,400,000 42,300,000 42,500,000  38,200,000 36,500,000 36,000,000  
        buildings
      		274,500,000 279,800,000 278,100,000 277,500,000 261,100,000 253,900,000 268,900,000 229,500,000 231,100,000 236,800,000 224,600,000 221,500,000 220,200,000 214,700,000 201,200,000 211,300,000 221,800,000 222,200,000 225,500,000 231,400,000 228,000,000 233,900,000 217,100,000 208,700,000 203,100,000 211,400,000 206,100,000 212,800,000 209,300,000 211,700,000 217,800,000 214,800,000 225,300,000 221,600,000 219,200,000 210,300,000 199,100,000 195,800,000 204,500,000 202,200,000 202,700,000 197,400,000 201,000,000 205,400,000 199,300,000 220,600,000 230,600,000 244,500,000 244,100,000 242,700,000 239,700,000 232,600,000 231,700,000 238,900,000 230,600,000 220,600,000 233,400,000 226,600,000 230,000,000 240,300,000 238,700,000  224,400,000 211,000,000 223,300,000  230,600,000 220,700,000 210,600,000  230,100,000 245,100,000 245,000,000  223,700,000 210,800,000 204,800,000  
        equipment
      		1,439,300,000 1,459,100,000 1,445,700,000 1,439,400,000 1,346,200,000 1,306,500,000 1,382,500,000 1,137,300,000 1,143,800,000 1,172,000,000 1,114,100,000 1,109,600,000 1,109,200,000 1,093,200,000 1,012,100,000 1,070,000,000 1,119,800,000 1,122,100,000 1,137,200,000 1,159,300,000 1,141,100,000 1,173,700,000 1,152,000,000 1,109,200,000 1,076,900,000 1,113,100,000 1,079,600,000 1,111,500,000 1,091,800,000 1,102,600,000 1,125,700,000 1,106,500,000 1,158,100,000 1,103,200,000 1,074,200,000 1,031,500,000 975,500,000 947,400,000 978,900,000 966,800,000 969,000,000 941,600,000 952,900,000 970,100,000 936,700,000 1,035,600,000 1,080,600,000 1,143,100,000 1,140,900,000 1,122,800,000 1,092,100,000 1,058,700,000 1,051,200,000 1,082,900,000 1,046,200,000 998,600,000 1,055,000,000 1,018,000,000 1,026,400,000 1,070,500,000 1,061,500,000  982,200,000 919,200,000 982,500,000  1,019,300,000 977,000,000 928,000,000  1,006,800,000 1,077,700,000 1,080,800,000  971,900,000 914,200,000 892,600,000  
        mining properties
      		138,600,000 134,200,000 135,000,000 131,800,000 125,800,000 115,800,000 126,700,000 124,500,000 122,200,000 130,500,000 123,400,000 114,900,000 113,200,000 119,600,000 109,000,000 116,600,000 133,500,000 129,600,000 125,300,000 128,100,000 128,500,000 127,800,000 110,300,000 107,000,000 98,500,000 116,200,000 113,200,000 120,800,000 114,800,000 114,000,000 119,500,000 119,100,000 123,700,000 115,700,000 118,800,000 112,500,000 109,800,000 108,100,000 116,200,000 110,600,000 111,100,000 102,600,000 102,700,000 113,900,000 110,800,000 116,700,000 127,800,000 132,200,000 131,600,000 130,100,000 128,500,000 124,300,000 124,800,000 131,300,000 126,000,000 114,100,000 120,600,000 114,900,000 120,500,000 124,200,000 121,600,000  113,000,000 104,000,000 111,300,000  114,900,000 104,700,000 79,400,000  87,200,000 97,800,000 95,600,000  93,700,000 86,300,000 83,700,000  
        construction in progress
      		48,500,000 44,500,000 44,500,000 45,400,000 45,500,000 41,100,000 33,100,000 22,300,000 22,100,000 22,900,000 49,400,000 85,500,000 83,900,000 76,500,000 66,400,000 66,100,000 80,400,000 72,700,000 71,800,000 64,300,000 59,500,000 56,100,000 66,600,000 55,800,000 51,400,000 54,900,000 45,800,000 46,900,000 45,100,000 38,000,000 34,800,000 31,200,000 27,000,000 52,600,000 52,600,000 47,500,000 33,900,000 38,700,000 47,800,000 39,800,000 33,600,000 29,200,000 32,100,000 26,300,000 23,800,000 24,400,000 37,100,000 31,800,000 30,300,000 50,000,000 57,800,000 50,800,000 41,700,000 37,300,000 35,300,000 31,200,000 27,500,000 27,000,000 33,300,000 25,300,000 12,600,000  21,800,000 17,800,000 16,500,000  19,600,000 18,100,000 48,900,000  61,400,000 54,700,000 40,300,000  41,000,000 32,500,000 22,100,000  
        less accumulated depreciation and amortization
      		1,266,900,000 1,272,600,000 1,256,800,000 1,242,000,000 1,149,100,000 1,097,400,000 1,167,300,000 1,112,400,000 1,100,900,000 1,124,000,000 1,077,200,000 1,084,100,000 1,078,800,000 1,061,400,000 982,800,000 1,033,000,000 1,095,500,000 1,087,100,000 1,100,900,000 1,116,800,000 1,092,700,000 1,111,000,000 1,102,600,000 1,053,200,000 1,010,000,000 1,045,400,000 1,018,500,000 1,045,800,000 1,019,000,000 1,020,900,000 1,047,300,000 1,025,300,000 1,063,200,000 1,028,700,000 1,020,000,000 975,400,000 916,900,000 893,300,000 939,900,000 918,300,000 913,800,000 879,100,000 896,100,000 914,600,000 878,800,000 960,200,000 1,020,400,000 1,070,500,000 1,060,800,000 1,055,600,000 1,039,500,000 1,002,700,000 989,800,000 1,013,100,000 990,600,000 939,500,000 984,000,000 944,200,000 976,600,000 1,009,400,000 990,400,000  922,100,000 854,800,000 906,300,000  928,000,000 875,600,000 829,700,000  902,300,000 958,500,000 949,600,000  871,100,000 810,900,000 779,400,000  
        net property and equipment
      		712,600,000 724,300,000 725,700,000 731,200,000 705,400,000 694,100,000 720,900,000 444,300,000 461,600,000 482,900,000 476,700,000 489,300,000 489,900,000 484,500,000 444,700,000 472,000,000 503,800,000 503,400,000 503,000,000 509,500,000 507,100,000 524,600,000 485,200,000 467,700,000 459,000,000 490,600,000 465,500,000 487,100,000 482,400,000 486,400,000 491,900,000 487,400,000 514,100,000 506,400,000 486,200,000 466,400,000 439,300,000 434,000,000 446,600,000 439,600,000 441,300,000 429,500,000 431,300,000 440,700,000 430,100,000 479,700,000 500,800,000 529,000,000 534,400,000 536,300,000 524,000,000 507,900,000 503,200,000 522,500,000 491,400,000 466,900,000 497,100,000 485,500,000 478,800,000 498,100,000 490,600,000  463,300,000 437,900,000 471,500,000  500,300,000 486,900,000 473,500,000  522,600,000 559,100,000 554,600,000  497,400,000 469,400,000 459,800,000  
        total assets
      		1,798,300,000 1,816,800,000 1,909,700,000 1,940,400,000 1,946,000,000 1,913,500,000 1,921,600,000 1,656,900,000 1,679,400,000 1,838,000,000 1,715,900,000 1,778,800,000 1,831,500,000 1,934,400,000 1,942,900,000 1,963,500,000 2,035,300,000 2,012,800,000 2,004,500,000 1,956,900,000 1,996,600,000 2,036,700,000 1,946,900,000 1,903,700,000 1,874,800,000 1,965,800,000 1,884,900,000 1,958,600,000 1,927,100,000 1,898,100,000 1,934,900,000 1,930,400,000 1,938,600,000 1,824,400,000 1,710,400,000 1,472,900,000 1,269,000,000 1,179,600,000 1,241,500,000 1,234,400,000 1,241,200,000 1,242,700,000 1,312,700,000 1,367,900,000 1,504,500,000 1,642,500,000 1,651,400,000 1,733,000,000 1,756,000,000 1,619,100,000 1,673,800,000 1,742,300,000 1,860,300,000 2,027,000,000 2,036,200,000 2,115,800,000 2,062,100,000 1,823,900,000 1,776,700,000 1,786,700,000 1,782,200,000 1,108,300,000 1,329,200,000 1,262,400,000 1,316,800,000 641,600,000 1,346,700,000 1,337,600,000 1,294,500,000 616,600,000 1,430,700,000 1,530,100,000 1,513,100,000 683,300,000 1,483,000,000 1,485,700,000 1,480,200,000  
        liabilities and stockholders’ equity
      		                                                     2,012,000,000    2,011,000,000                     
        current liabilities:
      		                                                                              
        accounts payable and accrued liabilities
      		296,800,000 353,100,000 274,000,000 292,900,000 323,400,000 358,300,000 296,700,000 262,800,000 251,300,000 324,100,000 246,400,000 253,100,000 251,800,000 289,400,000 322,600,000 267,600,000 261,000,000 256,900,000 246,900,000 194,300,000 238,000,000 215,900,000 211,600,000 201,300,000 216,100,000 237,700,000 224,400,000 247,300,000 230,900,000 195,800,000 212,300,000 219,800,000 227,900,000 189,600,000 217,000,000 195,900,000 192,400,000 158,800,000 179,100,000 183,400,000 182,100,000 172,700,000 195,300,000 204,300,000 178,200,000 202,600,000 205,200,000 243,000,000 260,300,000 242,300,000 265,500,000 239,900,000 266,600,000 231,600,000 256,900,000 339,400,000 268,600,000 285,800,000 263,600,000 200,700,000 227,100,000 4,000,000 194,700,000 174,900,000 188,300,000 100,000 190,000,000 174,800,000 136,600,000 200,000 198,900,000 205,100,000 197,700,000 100,000 203,600,000 173,000,000 172,400,000 415,000 
        income taxes
      		14,200,000 14,400,000 5,200,000 9,400,000 25,700,000 22,000,000 17,700,000 10,300,000 16,600,000 15,400,000 9,100,000 6,800,000 7,000,000 13,300,000 6,300,000 12,500,000 18,700,000 12,300,000 12,100,000 6,800,000 16,500,000 15,700,000 22,400,000 27,200,000 13,700,000 10,100,000 1,600,000 300,000 8,900,000 9,000,000 36,600,000 44,900,000 32,500,000 25,000,000 22,900,000 11,400,000 9,500,000 5,000,000 5,400,000 1,600,000 3,100,000 5,700,000 5,400,000 3,700,000 8,400,000 7,800,000 300,000 100,000 8,700,000 8,900,000 200,000 4,200,000 31,500,000 23,100,000 20,900,000 25,000,000 39,300,000 25,200,000 24,200,000 18,000,000 16,200,000  3,600,000 3,800,000 2,200,000  3,100,000 5,800,000 5,800,000  8,200,000 3,500,000 6,200,000  21,900,000 17,500,000 14,300,000  
        total current liabilities
      		311,000,000 368,800,000 279,200,000 390,200,000 430,300,000 476,600,000 398,300,000 273,100,000 267,900,000 370,800,000 256,200,000 260,600,000 259,700,000 326,700,000 330,200,000 281,500,000 281,100,000 288,800,000 259,700,000 201,800,000 255,200,000 260,200,000 235,500,000 230,000,000 231,200,000 270,600,000 227,500,000 249,100,000 241,300,000 233,400,000 249,600,000 265,400,000 261,100,000 231,500,000 240,000,000 210,900,000 205,500,000 182,100,000 206,500,000 218,600,000 188,900,000 201,700,000 204,700,000 212,100,000 193,800,000 237,900,000 211,300,000 249,000,000 274,900,000 278,000,000 297,400,000 275,700,000 329,800,000 328,400,000 305,500,000 392,000,000 316,200,000 328,000,000 294,800,000 226,000,000 250,600,000 80,900,000 204,700,000 203,000,000 196,900,000 64,000,000 199,700,000 258,600,000 216,500,000 41,000,000 210,100,000 235,800,000 234,100,000 28,800,000 250,500,000 193,100,000 189,100,000 729,000 
        noncurrent liabilities:
      		                                                                              
        long-term debt
      		602,700,000 557,400,000 626,200,000 501,400,000 476,000,000 429,100,000 470,400,000 423,700,000 426,900,000 440,900,000 422,500,000 432,400,000 433,500,000 424,100,000 390,900,000 415,800,000 443,800,000 449,800,000 461,100,000 472,500,000 465,900,000 486,700,000 465,900,000 445,000,000 436,300,000 444,000,000 434,600,000 452,200,000 445,800,000 455,100,000 465,200,000 460,900,000 487,400,000 473,800,000 467,500,000 350,800,000 360,900,000 335,400,000 336,000,000 336,500,000 346,100,000 337,200,000 342,900,000 343,900,000 344,700,000 344,700,000 345,700,000 345,800,000 346,600,000 180,400,000 203,300,000 286,900,000 278,600,000 378,900,000 416,100,000 475,300,000 479,500,000 362,900,000 400,700,000 509,400,000 567,600,000  539,900,000 530,300,000 589,800,000  641,600,000 598,600,000 587,600,000  635,000,000 658,700,000 633,300,000  568,100,000 564,000,000 564,800,000  
        accrued pension costs
      		76,400,000 80,900,000 125,200,000 127,100,000 119,300,000 117,500,000 144,200,000 140,100,000 143,600,000 150,000,000 122,300,000 126,900,000 129,300,000 128,600,000 245,700,000 263,600,000 282,300,000 287,400,000 349,300,000 359,000,000 355,800,000 372,600,000 321,900,000 307,700,000 301,400,000 307,400,000 249,300,000 259,800,000 256,300,000 262,900,000 247,500,000 246,000,000 260,100,000 254,200,000                                         195,100,000 186,200,000 185,000,000  
        operating lease liabilities
      		14,900,000 15,700,000 16,500,000 17,100,000 17,000,000 17,100,000 18,100,000 18,100,000 17,900,000 18,600,000 16,900,000 17,100,000 17,200,000 17,400,000 16,200,000 15,500,000 17,200,000 15,800,000 16,600,000 17,100,000 17,600,000 18,800,000 19,600,000 20,100,000 20,300,000 22,200,000 23,100,000 24,600,000 25,600,000                                                  
        total noncurrent liabilities
      		742,300,000 696,900,000 825,800,000 703,400,000 668,700,000 619,900,000 675,900,000 609,200,000 637,100,000 658,900,000 626,500,000 641,700,000 659,700,000 650,500,000 733,800,000 778,400,000 840,600,000 853,800,000 922,800,000 943,900,000 940,500,000 980,000,000 909,700,000 872,400,000 861,300,000 879,100,000 810,500,000 841,500,000 834,500,000 824,900,000 811,900,000 811,400,000 859,200,000 838,600,000 759,700,000 641,200,000 636,700,000 602,500,000 580,100,000 579,200,000 597,500,000 579,100,000 600,300,000 604,200,000 592,200,000 623,500,000 539,200,000 552,700,000 560,500,000 406,000,000 455,900,000 529,700,000 548,000,000 636,500,000 615,100,000 669,800,000 691,000,000 571,600,000 592,900,000 713,000,000 764,300,000 266,200,000 717,200,000 697,300,000 768,500,000 265,100,000 845,900,000 798,000,000 783,600,000 257,700,000 852,200,000 891,800,000 870,900,000 243,500,000 855,900,000 840,900,000 839,900,000 220,350,000 
        stockholders’ equity:
      		                                                                              
        common stock
      		1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 1,200,000  1,200,000 1,200,000 600,000  500,000 500,000 500,000  500,000 500,000 500,000  500,000 500,000 500,000  500,000 500,000 500,000  
        additional paid-in capital
      		1,390,400,000 1,390,400,000 1,390,400,000 1,390,400,000 1,390,300,000 1,390,300,000 1,390,300,000 1,390,300,000 1,390,200,000 1,390,200,000 1,390,200,000 1,390,200,000 1,393,000,000 1,394,300,000 1,394,200,000 1,394,200,000 1,395,200,000 1,395,400,000 1,395,400,000 1,395,400,000 1,395,300,000 1,395,300,000 1,395,300,000 1,395,300,000 1,396,200,000 1,396,200,000 1,397,800,000 1,399,200,000 1,399,100,000 1,399,100,000 1,399,100,000 1,399,100,000 1,399,000,000 1,399,000,000 1,399,000,000 1,399,000,000 1,398,800,000 1,398,800,000 1,398,800,000 1,398,800,000 1,398,700,000 1,398,700,000 1,398,700,000 1,398,700,000 1,398,600,000 1,398,600,000 1,398,600,000 1,398,600,000 1,398,500,000 1,398,500,000 1,398,500,000 1,399,200,000 1,399,100,000 1,399,100,000 1,399,100,000 1,399,100,000 1,399,000,000 1,399,000,000 1,399,000,000 1,399,000,000 1,399,400,000  1,062,000,000 1,062,000,000 1,061,900,000  1,061,900,000 1,061,900,000 1,061,800,000  1,061,800,000 1,061,800,000 1,061,700,000  1,061,700,000 1,061,700,000 1,061,600,000  
        retained deficit
      		-355,500,000 -344,900,000 -256,400,000 -213,600,000 -198,700,000 -211,000,000 -192,100,000 -258,100,000 -255,800,000 -242,000,000 -214,800,000 -172,600,000 -142,500,000 -105,400,000 -63,500,000 -62,600,000 -86,500,000 -122,100,000 -132,900,000 -148,100,000 -153,000,000 -151,800,000 -141,200,000 -128,500,000 -126,300,000 -132,500,000 -121,000,000 -118,100,000 -126,800,000 -136,200,000 -140,500,000 -153,400,000 -211,400,000 -267,200,000 -297,300,000 -353,700,000 -532,800,000 -552,200,000 -558,100,000 -562,900,000 -547,200,000 -526,000,000 -488,200,000 -459,100,000 -281,900,000 -282,900,000 -285,400,000 -300,000,000 -315,700,000 -312,600,000 -298,200,000 -250,900,000 -199,600,000 -141,100,000 -105,700,000 -123,500,000 -170,600,000 -290,100,000 -358,500,000 -427,000,000 -498,600,000  -508,500,000 -540,500,000 -559,800,000  -607,800,000 -616,300,000 -594,500,000  -562,800,000 -547,000,000 -540,500,000  -513,500,000 -420,100,000 -407,800,000  
        accumulated other comprehensive loss
      		-291,100,000 -295,600,000 -330,500,000 -331,200,000 -345,800,000 -363,500,000 -352,000,000 -358,800,000 -361,200,000 -341,100,000 -343,400,000 -342,300,000 -338,100,000 -331,500,000 -453,000,000 -429,200,000 -395,200,000 -404,100,000 -441,700,000 -437,300,000 -442,600,000 -448,200,000 -453,600,000 -466,700,000 -487,800,000 -448,800,000 -429,500,000 -412,900,000 -422,200,000 -424,300,000 -386,400,000 -393,300,000 -370,500,000 -378,700,000 -392,200,000 -425,700,000 -440,400,000 -452,800,000 -387,000,000 -400,500,000 -397,900,000 -412,000,000 -404,000,000 -389,200,000 -399,400,000 -335,800,000 -213,500,000 -168,500,000 -163,400,000 -152,000,000 -181,000,000 -212,600,000 -218,200,000 -197,100,000 -179,000,000 -222,800,000 -174,700,000  -152,700,000 -125,500,000 -134,100,000  -146,700,000 -159,900,000 -151,200,000  -153,500,000 -165,100,000 -173,400,000  -131,100,000 -112,800,000 -113,600,000  -172,100,000 -190,400,000 -203,100,000  
        total stockholders’ equity
      		745,000,000 751,100,000 804,700,000 846,800,000 847,000,000 817,000,000 847,400,000 774,600,000 774,400,000 808,300,000 833,200,000 876,500,000 912,100,000 957,200,000 878,900,000 903,600,000 913,600,000 870,200,000                    395,000,000             920,500,000 936,900,000 982,500,000 1,062,100,000 1,115,600,000 1,054,000,000 1,054,900,000 924,300,000 889,000,000 847,700,000                   
        total liabilities and stockholders’ equity
      		1,798,300,000 1,816,800,000 1,909,700,000 1,940,400,000 1,946,000,000 1,913,500,000 1,921,600,000 1,656,900,000 1,679,400,000 1,838,000,000 1,715,900,000 1,778,800,000 1,831,500,000 1,934,400,000 1,942,900,000 1,963,500,000 2,035,300,000 2,012,800,000                    1,179,600,000             1,673,800,000 1,742,300,000 1,860,300,000 2,027,000,000 2,036,200,000 2,115,800,000 2,062,100,000 1,823,900,000 1,776,700,000 1,786,700,000 1,782,200,000 1,108,300,000 1,329,200,000 1,262,400,000 1,316,800,000 641,600,000 1,346,700,000 1,337,600,000 1,294,500,000 616,600,000 1,430,700,000 1,530,100,000 1,513,100,000 683,300,000 1,483,000,000 1,485,700,000 1,480,200,000  
        receivables from affiliates
      		 3,400,000    600,000    17,300,000    2,700,000    18,400,000    3,500,000    6,900,000    13,000,000    27,400,000                                            5,326,000 
        current maturities of long-term debt
      		   87,900,000 81,200,000 78,300,000 83,900,000    700,000 700,000 900,000 1,100,000 1,300,000 1,400,000 1,400,000 1,400,000 700,000 700,000 700,000 700,000 1,500,000 1,500,000 1,400,000 1,500,000 1,500,000 1,500,000 1,500,000 1,500,000 700,000 700,000 700,000 700,000 100,000 3,600,000 3,600,000 3,600,000 22,000,000 33,600,000 3,700,000 3,800,000 3,800,000 3,900,000 3,900,000 3,900,000 3,900,000 3,900,000 3,900,000 3,100,000 20,700,000 20,900,000 21,100,000 21,200,000 21,500,000 21,700,000 2,000,000 2,200,000 2,200,000 2,300,000 2,200,000  2,100,000 20,500,000 2,100,000  1,700,000 73,400,000 69,700,000  800,000 23,700,000 26,700,000  23,400,000 900,000 900,000  
        payables to affiliates
      		 1,300,000    18,000,000    31,300,000    22,900,000    18,200,000    27,900,000    21,300,000    27,100,000        14,700,000    19,500,000    19,900,000    21,700,000    41,600,000    8,600,000                     
        common stock, .01 par value...
      		 1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000    1,200,000                     
        investment in tio2 manufacturing joint venture
      		       101,200,000 108,700,000 111,000,000 115,700,000 121,200,000 113,600,000 112,900,000 110,400,000 106,000,000 105,700,000 101,900,000 105,500,000 103,500,000 106,700,000 103,300,000 96,700,000 96,500,000 92,400,000 90,200,000 83,100,000 85,700,000 82,100,000 81,300,000 79,700,000 80,300,000 79,600,000 86,500,000 75,100,000 70,500,000 82,000,000 78,900,000 79,800,000 76,300,000 83,700,000 82,900,000 81,400,000 84,400,000 77,800,000 89,000,000 89,100,000 88,600,000 97,800,000 102,300,000 105,900,000 95,200,000 100,100,000 109,900,000 119,300,000 108,600,000 108,000,000 89,200,000 94,100,000 93,200,000 95,100,000  96,900,000 97,200,000 98,000,000  104,100,000 101,000,000 107,400,000  113,600,000 115,600,000 117,100,000  117,500,000 115,000,000 112,600,000  
        payable to affiliate - income taxes
      		        18,600,000 18,600,000 18,600,000 18,600,000 33,500,000 33,500,000 33,500,000 33,500,000 44,700,000 44,700,000 44,700,000 44,700,000 50,600,000 50,600,000 50,600,000 50,600,000 56,600,000 56,600,000 56,600,000 56,600,000 56,600,000 56,600,000 58,100,000                                                
        treasury stock
      		            -1,500,000 -1,400,000   -1,100,000 -200,000       -1,000,000  -1,600,000 -1,400,000                                                   
        assets
      		                                                                              
        liabilities and stockholders' equity
      		                                                                              
        stockholders' equity:
      		                                                                              
        total stockholders' equity
      		                  822,000,000 811,200,000 800,900,000 796,500,000 801,700,000 801,300,000 782,300,000 816,100,000 846,900,000 868,000,000 851,300,000 839,800,000 873,400,000 853,600,000 818,300,000 754,300,000 710,700,000 620,800,000 426,800,000  454,900,000 436,600,000 454,800,000 461,900,000 507,700,000 551,600,000 718,500,000 781,100,000 900,900,000 931,300,000 920,600,000 935,100,000           767,300,000  407,300,000 362,100,000 351,400,000  301,100,000 281,000,000 294,400,000  368,400,000 402,500,000 408,100,000  376,600,000 451,700,000 451,200,000  
        total liabilities and stockholders' equity
      		                  2,004,500,000 1,956,900,000 1,996,600,000 2,036,700,000 1,946,900,000 1,903,700,000 1,874,800,000 1,965,800,000 1,884,900,000 1,958,600,000 1,927,100,000 1,898,100,000 1,934,900,000 1,930,400,000 1,938,600,000 1,824,400,000 1,710,400,000 1,472,900,000 1,269,000,000  1,241,500,000 1,234,400,000 1,241,200,000 1,242,700,000 1,312,700,000 1,367,900,000 1,504,500,000 1,642,500,000 1,651,400,000 1,733,000,000 1,756,000,000 1,619,100,000                             
        note receivable from valhi
      		                          5,000,000 1,700,000 1,500,000     13,600,000                     167,600,000 154,900,000 152,100,000 136,100,000 103,300,000 69,000,000 47,600,000 61,900,000                 
        accrued postretirement benefits costs
      		                              7,500,000 7,300,000 7,500,000 7,700,000                                             
        payable to affiliate
      		                               64,000,000 70,100,000 16,200,000                                             
        accrued pension cost
      		                                  254,200,000 246,000,000 232,000,000 227,300,000 203,300,000 201,500,000 206,700,000 202,700,000 211,900,000 214,500,000 208,700,000 237,100,000 144,500,000 155,600,000 158,100,000 163,800,000 184,300,000 180,400,000 181,500,000 189,200,000 122,400,000 119,000,000 128,600,000 127,600,000 115,000,000 121,400,000 121,900,000  107,000,000 100,200,000 110,800,000  123,600,000 120,100,000 118,600,000  128,600,000 140,400,000 143,900,000      
        accrued postretirement benefits cost
      		                                  7,400,000 7,100,000 6,900,000 6,900,000 7,000,000 7,100,000 7,000,000 6,700,000 7,200,000 7,700,000 7,600,000 8,100,000 7,500,000 7,800,000 7,600,000 7,800,000    14,100,000    12,700,000                     
        receivable from affiliate
      		                                     3,500,000    2,500,000    18,000,000    14,200,000        29,600,000                     
        accrued postretirement benefit cost
      		                                                  14,100,000 13,700,000 14,000,000  13,600,000 12,900,000 13,100,000  10,600,000 10,900,000 10,900,000  14,000,000 13,900,000 13,900,000  9,700,000 9,300,000 8,700,000  11,400,000 11,500,000 11,400,000      
        marketable equity securities
      		                                                   23,800,000  21,600,000    98,400,000    49,700,000                 
        prepaid expenses
      		                                                     9,800,000    5,700,000    300,000    300,000    300,000 8,000,000 6,700,000 6,500,000 300,000    316,000 
        accumulated other comprehensive income:
      		                                                                              
        currency translation
      		                                                         -91,800,000                     
        defined benefit pension plans
      		                                                         -99,200,000                     
        postretirement benefit (opeb) plans
      		                                                         100,000                     
        cash and equivalents
      		                                                             209,900,000                 
        receivables from subsidiary
      		                                                             51,900,000    28,800,000    19,900,000    13,900,000     
        investment in subsidiaries
      		                                                             733,500,000    612,100,000    594,000,000    668,600,000    657,514,000 
        payable to affiliate and subsidiary
      		                                                             76,900,000    63,900,000    40,800,000    28,700,000     
        notes payable to kii
      		                                                             217,700,000    235,100,000             
        interest payable to kii
      		                                                             45,400,000    27,200,000             
        stockholders’ equity
      		                                                             761,200,000    312,500,000    317,900,000    411,000,000    448,399,000 
        note payable to nl industries, inc.
      		                                                                     19,200,000         
        notes payable to subsidiary
      		                                                                     229,300,000    240,000,000     
        interest payable to subsidiary
      		                                                                     5,400,000         
        notes receivable from subsidiary
      		                                                                              
        accrued postretirement benefit (opeb) costs
      		                                                                          11,700,000 11,100,000 10,400,000  
        notes receivable from subsidiaries
      		                                                                             5,895,000 
        payable to affiliates
      		                                                                             312,000 
        notes payable to subsidiaries
      		                                                                             215,415,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 
                                                                                    
          cash flows from operating activities:
        		                                                                            
          net income
        		-82,800,000 -37,000,000 -9,200,000 18,100,000 -13,200,000 71,800,000 19,500,000 8,100,000 -5,300,000 -20,400,000 -8,200,000 -15,200,000 -19,900,000 21,000,000 45,900,000 57,500,000 31,600,000 36,000,000 25,700,000 19,600,000 10,200,000 8,100,000 18,600,000 27,000,000 9,400,000 17,900,000 29,500,000 30,300,000 24,000,000 32,600,000 77,700,000 70,700,000 47,400,000 73,800,000 196,500,000 36,800,000 23,200,000   -3,800,000 -20,400,000 -11,800,000 -159,800,000 18,400,000 19,900,000 31,900,000 33,100,000 14,300,000 2,900,000 -29,900,000 -33,900,000 -41,100,000 -18,100,000 35,200,000 64,500,000 136,900,000 85,800,000 85,900,000 89,000,000 60,300,000 36,500,000 32,000,000 19,300,000 42,800,000 5,200,000 8,500,000 -21,800,000 -26,600,000 7,200,000 -3,600,000 5,800,000 -400,000 1,600,000 -81,200,000 0 12,900,000 
          depreciation
        		15,900,000 15,600,000 15,100,000 13,900,000 14,100,000 17,000,000 18,400,000 10,900,000 12,000,000 12,100,000 11,600,000 12,900,000 12,700,000 13,000,000 13,100,000 12,900,000 13,200,000 12,600,000 12,800,000 12,700,000 14,800,000 13,800,000 14,600,000 14,900,000 13,800,000 11,800,000 11,900,000 10,600,000                                                 
          amortization of operating lease right-of-use assets
        		1,100,000 1,200,000 1,000,000 1,000,000 1,000,000 900,000 1,000,000 1,100,000 1,100,000 1,100,000 1,200,000 1,100,000 1,100,000 1,000,000 1,000,000 1,400,000 1,600,000 1,700,000 1,600,000 1,700,000 1,700,000 1,700,000 1,500,000 1,600,000 1,700,000 1,700,000 1,700,000 1,700,000                                                 
          gain on remeasurement of investment in tio2 manufacturing joint venture
        		    0                                                                        
          gain on remeasurement of earn-out liability
        		0                                                                            
          premium on issuance of senior secured notes
        		0    0                                                                        
          deferred income taxes
        		-13,700,000   1,500,000 19,200,000 14,100,000 -1,800,000 -200,000 -7,600,000 -12,200,000 -20,600,000 1,100,000 -3,000,000 -1,700,000 1,600,000 1,700,000 11,100,000 2,100,000 900,000 200,000 9,100,000 -3,800,000 -7,600,000 -900,000 -200,000 -200,000 3,800,000 3,100,000 6,800,000 3,300,000 7,800,000 9,400,000 -11,700,000 4,500,000 -147,400,000 3,000,000 10,200,000 -3,000,000 700,000 -200,000 -100,000 -6,200,000 142,500,000 2,300,000 -1,000,000 9,700,000 1,500,000 9,400,000 -5,800,000 -8,800,000 -20,600,000 -32,700,000 -2,400,000 -3,200,000 4,100,000 24,100,000 16,600,000 18,500,000 18,400,000 10,300,000 21,500,000 8,600,000 3,400,000 -33,400,000 -1,400,000 4,000,000 -9,900,000 -14,600,000 -2,900,000 -200,000 -7,600,000 100,000 5,800,000 90,600,000 8,600,000 -200,000 
          benefit plan expense greater (less) than cash funding
        		        -800,000 -1,200,000 -900,000 -2,200,000                                                                 
          loss on pension plan termination
        		                                                                            
          marketable equity securities
        		500,000 100,000 0 1,000,000 1,400,000 -2,200,000 -100,000 -300,000 -300,000 0 600,000 700,000 500,000 2,900,000 -2,300,000 -100,000 -800,000 100,000 -500,000 -800,000 -200,000 -400,000 200,000 1,500,000 0 1,900,000 -1,200,000 -600,000 600,000 4,300,000                                               
          distributions from (contributions to) tio2 manufacturing joint venture
        		      7,500,000 2,300,000                 -7,500,000 2,600,000 -3,600,000 -800,000    5,500,000        -800,000          -10,700,000 4,900,000 9,800,000 9,400,000 -10,700,000 -600,000 -18,800,000                     
          fixed asset impairment
        		                                                                            
          other
        		-1,300,000 3,100,000 -1,800,000 -1,000,000 200,000 -100,000 1,400,000 2,100,000 200,000 100,000 1,100,000 400,000 300,000 800,000 800,000 1,600,000 400,000 0 300,000 100,000 600,000 500,000 900,000 -1,100,000 800,000 500,000 700,000 500,000 1,000,000 0 700,000 1,100,000 700,000 800,000 400,000 500,000 3,300,000 600,000 700,000 -1,600,000 400,000 3,800,000 -1,200,000 3,300,000 8,400,000 1,200,000 -300,000 1,400,000 3,100,000 -1,100,000 3,800,000 2,400,000 -200,000 -1,700,000 2,000,000 400,000 1,600,000 3,900,000 1,500,000 300,000 -3,100,000 1,000,000 2,700,000 -500,000 3,700,000 400,000 1,100,000 -100,000 3,300,000 400,000 600,000 800,000 -400,000 1,400,000 400,000 2,000,000 
          change in assets and liabilities:
        		                                                                            
          accounts and other receivables
        		47,300,000 5,900,000 32,200,000 -53,700,000 59,600,000 13,600,000 -23,300,000 -58,300,000 13,300,000 3,600,000 -21,800,000 -39,000,000 103,600,000 40,700,000 -17,400,000 -41,200,000 2,400,000 -30,300,000 -7,200,000 -23,500,000 5,700,000 1,300,000 27,000,000 -38,700,000 53,100,000 30,600,000 -45,000,000 -45,500,000 34,300,000 34,000,000 -20,900,000 -38,700,000 24,300,000 -1,900,000 -48,300,000 -26,800,000 -500,000 11,000,000 -31,400,000 -16,500,000 22,200,000 33,900,000 4,300,000 -40,300,000 49,400,000 6,500,000 -22,500,000 -61,200,000 62,100,000 56,400,000 -10,700,000 -83,000,000  118,100,000 -5,000,000 -162,400,000 55,100,000 15,700,000 -63,300,000 -55,700,000  5,500,000 -46,200,000 -39,600,000 29,900,000 -6,600,000 -12,900,000 -16,000,000  33,100,000 -35,700,000 -37,700,000  4,300,000 -14,600,000 -37,200,000 
          inventories
        		32,300,000 24,200,000 47,700,000 -27,200,000 -137,000,000 -6,300,000 24,600,000 75,600,000 -50,200,000 35,300,000 70,700,000 500,000 -64,300,000 -103,800,000 2,500,000 -32,800,000 -15,200,000 -3,400,000 48,800,000 35,600,000 5,600,000 11,500,000 -7,100,000 3,300,000 -59,200,000 40,200,000 14,100,000 -2,200,000 -65,200,000 -29,900,000 500,000 -40,900,000 -44,800,000 17,000,000 35,000,000 -12,100,000 -42,300,000 23,500,000 38,100,000 19,500,000 -11,100,000 4,300,000 5,600,000 -8,300,000 -45,200,000 -22,200,000 6,500,000 8,600,000 -20,700,000 66,300,000 83,500,000 93,100,000 -26,600,000 59,800,000 -91,900,000 -126,100,000 -124,000,000 -42,800,000 20,600,000 -37,600,000  2,100,000 21,000,000 7,300,000 -38,100,000 2,100,000 55,600,000 79,800,000 -96,900,000 -13,600,000 20,400,000 -3,800,000 -15,700,000 21,500,000 15,900,000 -16,000,000 
          prepaid expenses
        		4,900,000 -11,300,000 15,000,000 1,300,000 4,700,000 -18,400,000 3,700,000 4,400,000 3,300,000 -10,100,000 5,000,000 8,100,000 2,300,000 -14,400,000 8,500,000 -8,900,000 -2,200,000 -20,900,000 -2,400,000 5,000,000 -1,300,000 -7,300,000 2,000,000 3,600,000 2,200,000 -6,000,000 1,200,000 2,900,000 2,800,000 -4,900,000 -4,200,000 1,000,000 2,400,000 -4,000,000 1,100,000 1,400,000 1,800,000 -5,700,000 1,600,000 800,000 1,400,000 -1,000,000 -1,700,000 -300,000 2,100,000 -3,500,000 2,900,000 -1,900,000 3,800,000 -5,700,000 2,200,000 500,000 1,700,000 -4,900,000 300,000 -800,000 1,500,000 -2,900,000 2,200,000 -500,000  -2,500,000 2,400,000 -800,000 2,000,000 -4,100,000 2,900,000 -2,100,000 600,000 -1,800,000 -200,000 -200,000 4,700,000 -1,700,000 -1,200,000 -1,200,000 
          accounts payable and accrued liabilities
        		75,900,000 -18,100,000 -21,200,000 -62,200,000 79,700,000 24,500,000 11,100,000 -103,700,000 105,100,000 -8,100,000 -3,100,000 -60,000,000 -15,500,000 66,400,000 11,000,000 -25,200,000 35,800,000 51,900,000 -41,000,000 500,000 4,100,000 16,100,000 -22,900,000 -30,500,000 19,600,000 -18,700,000 18,300,000 5,400,000 3,400,000 -11,000,000 -4,600,000 28,600,000 -23,100,000 28,600,000 -6,300,000 21,500,000 -3,900,000 500,000 -5,600,000 -3,900,000 -4,600,000 -9,000,000 20,200,000 -18,600,000 19,100,000 -29,800,000 -14,300,000 3,900,000 -6,900,000 17,200,000 -34,200,000 33,000,000 -9,400,000 -92,300,000 59,200,000 -13,700,000 38,800,000 61,200,000 -22,300,000 17,100,000  13,300,000 -6,500,000 -6,200,000 10,800,000 9,000,000 30,900,000 -45,300,000 2,000,000 10,400,000 3,500,000 800,000 -23,300,000 23,000,000 -4,200,000 7,100,000 
          income taxes
        		8,400,000 -3,400,000 -17,600,000 2,000,000 6,200,000 7,100,000 -6,400,000 2,000,000 4,400,000 2,000,000 4,400,000 -2,600,000 2,400,000 -6,000,000 -2,900,000 6,400,000 -100,000 7,100,000 -9,500,000 900,000 -11,700,000 -3,000,000 11,900,000 9,400,000 600,000 3,900,000 -7,000,000 -600,000 -28,300,000 -8,500,000 13,700,000 6,700,000 3,900,000 8,800,000 1,800,000 4,700,000 2,200,000 6,000,000 -1,200,000 -3,200,000 -2,300,000 5,400,000 -2,500,000 -2,100,000 8,200,000 1,700,000 -4,000,000 400,000 -800,000 -4,400,000 -20,800,000 16,400,000 -13,200,000 -5,100,000 -13,100,000 12,900,000 1,100,000 6,600,000 2,600,000 9,100,000  -400,000 1,800,000 -600,000 0 -2,900,000 -100,000 3,400,000 3,800,000 4,800,000 -2,800,000 -4,000,000 -18,700,000 3,100,000 2,500,000 4,600,000 
          accounts with affiliates
        		-3,000,000 4,800,000 -38,100,000 5,200,000 14,400,000 -20,900,000 -15,500,000 15,300,000 -20,800,000 9,300,000 600,000 -15,100,000 2,200,000 -7,200,000 3,900,000 9,800,000 -6,900,000 -10,800,000 -12,800,000 4,200,000 14,900,000 -5,700,000 -12,000,000 -1,500,000 -2,800,000 9,100,000 -7,700,000 700,000 -1,700,000 -6,200,000 22,900,000 400,000 56,400,000 -17,700,000 3,400,000 -800,000 12,400,000 -9,500,000 9,200,000 -17,900,000 8,900,000 -5,900,000 2,900,000 13,300,000 -9,100,000 -2,300,000 -200,000 7,500,000 3,500,000 -20,300,000 39,300,000 -59,700,000 16,100,000 16,400,000 5,100,000 29,600,000 -35,900,000 4,700,000 -6,200,000 7,600,000  -700,000 800,000 1,200,000 800,000 -700,000 5,900,000 -9,700,000 600,000 200,000 900,000 2,400,000 400,000 -1,000,000 -1,200,000 -200,000 
          other noncurrent assets
        		                                                                            
          other noncurrent liabilities
        		                                                                            
          net cash from operating activities
        		92,100,000 -7,900,000 20,700,000 -102,400,000 49,300,000 28,300,000 38,200,000 -43,300,000 64,400,000 17,700,000 33,200,000 -109,800,000 22,600,000 9,800,000 67,900,000 -18,600,000 80,500,000 47,900,000 21,400,000 56,700,000 46,400,000 38,000,000 27,900,000 -9,800,000 36,500,000 97,800,000 19,000,000 7,000,000 -10,500,000 29,300,000 111,500,000 58,200,000 57,800,000 116,700,000 60,000,000 41,600,000 20,900,000 52,100,000 31,900,000 -15,300,000 2,000,000 41,800,000 18,300,000 -10,000,000 61,200,000 6,700,000 22,300,000 -2,500,000 69,600,000 75,900,000 24,200,000 -39,300,000 19,400,000 124,500,000 37,700,000 -104,700,000 52,200,000 163,200,000 59,000,000 21,200,000 -72,000,000 71,100,000 12,600,000 -16,000,000 22,800,000 19,000,000 62,000,000 -17,500,000 -10,900,000 45,000,000 -2,300,000 -29,100,000 21,300,000 68,800,000 16,200,000 -16,300,000 
          cash flows from investing activities:
        		                                                                            
          capital expenditures
        		-10,200,000 0 0 0 -12,300,000 0 0 0 -5,300,000 -8,200,000 0 0 -18,800,000 -13,900,000 0 0 -22,700,000 -14,700,000 -10,400,000 -10,800,000 -24,500,000 -12,900,000 -10,100,000 -15,300,000 -20,900,000 -8,700,000 -9,500,000 -16,000,000 -20,900,000 -10,600,000 -9,600,000 -15,200,000 -23,600,000 -14,100,000 -14,700,000 -11,900,000 -18,700,000 -10,600,000 -9,400,000 -14,300,000 -15,400,000 -12,400,000 -7,600,000 -11,700,000 -21,300,000 -12,200,000 -11,400,000 -16,300,000 -17,700,000 -16,100,000 -14,800,000 -19,000,000 -29,300,000 -13,600,000 -8,600,000 -23,300,000 -29,900,000 -14,100,000 -11,300,000 -13,300,000 0 -9,000,000 -6,900,000 -8,500,000 -6,400,000 -2,600,000 -3,300,000 -11,400,000 -13,800,000 -19,600,000 -17,900,000 -16,800,000 -17,900,000 -12,800,000 -11,100,000 -5,500,000 
          free cash flows
        		81,900,000 -7,900,000 20,700,000 -102,400,000 37,000,000 28,300,000 38,200,000 -43,300,000 59,100,000 9,500,000 33,200,000 -109,800,000 3,800,000 -4,100,000 67,900,000 -18,600,000 57,800,000 33,200,000 11,000,000 45,900,000 21,900,000 25,100,000 17,800,000 -25,100,000 15,600,000 89,100,000 9,500,000 -9,000,000 -31,400,000 18,700,000 101,900,000 43,000,000 34,200,000 102,600,000 45,300,000 29,700,000 2,200,000 41,500,000 22,500,000 -29,600,000 -13,400,000 29,400,000 10,700,000 -21,700,000 39,900,000 -5,500,000 10,900,000 -18,800,000 51,900,000 59,800,000 9,400,000 -58,300,000 -9,900,000 110,900,000 29,100,000 -128,000,000 22,300,000 149,100,000 47,700,000 7,900,000 -72,000,000 62,100,000 5,700,000 -24,500,000 16,400,000 16,400,000 58,700,000 -28,900,000 -24,700,000 25,400,000 -20,200,000 -45,900,000 3,400,000 56,000,000 5,100,000 -21,800,000 
          acquisition of remaining tio2 manufacturing joint venture interest, net of cash acquired
        		    0                                                                        
          net cash from investing activities
        		-10,200,000    -12,300,000    -5,300,000 -8,200,000   -18,800,000 -13,900,000   -22,700,000 -14,700,000 -10,400,000 -10,800,000 -24,500,000 -12,900,000 -10,100,000 -13,800,000 -13,300,000 -12,000,000 -9,700,000 -17,500,000 -20,900,000 -10,600,000 -9,600,000 -1,600,000 -37,200,000 -14,100,000 -14,700,000 -11,900,000 -19,400,000 -10,300,000 -9,600,000 -13,700,000 -15,800,000 -12,200,000 -7,800,000 -11,000,000 -21,600,000 -11,900,000 -4,800,000 -15,700,000 -18,800,000 -15,900,000 -15,200,000 -18,300,000 207,300,000 -25,900,000 -11,800,000 -19,800,000 -44,600,000 -14,400,000 -29,900,000 -129,200,000 -85,000,000 -8,900,000 -7,000,000 -8,000,000 -6,900,000 -2,600,000 -3,400,000 -10,800,000 -14,400,000 -19,300,000 -18,300,000 -16,100,000  -12,400,000 -11,400,000 -4,900,000 
          cash flows from financing activities:
        		                                                                            
          revolving credit facility:
        		                                                                            
          borrowings
        		154,100,000 178,100,000 161,300,000 145,000,000 10,000,000                            0 570,700,000 118,600,000 42,200,000 56,300,000 101,700,000 99,000,000 9,200,000 0 0 0 1,300,000 0 1,100,000 0 429,300,000 71,800,000 90,300,000 12,700,000 191,800,000 71,000,000 0 394,000,000 107,400,000 0 0 0 113,300,000  3,700,000 37,200,000 88,900,000 68,200,000 73,800,000 48,100,000 94,400,000 80,300,000 101,700,000 112,700,000 103,800,000 67,600,000 85,700,000 85,400,000 92,200,000 
          payments
        		-224,100,000 -144,800,000 -168,800,000 -112,100,000 -25,000,000                                                                        
          payments on long-term debt
        		0    0 0 0 -52,600,000 -600,000 -100,000 -200,000 -200,000 -800,000 -200,000 -100,000 -200,000 -900,000 -100,000 -200,000 -200,000 -900,000 -100,000 0 -100,000  -300,000 -200,000 -100,000                                                 
          proceeds from issuance of senior secured notes
        		0    0                                                                        
          loan from contran
        		    0 0 0 53,700,000                                                                     
          deferred financing fees
        		-500,000    0 -3,500,000 -900,000 -4,900,000         -100,000 0               -600,000 -8,200,000 0 -100,000         0 0 0 -6,100,000                 0            
          dividends paid
        		-5,700,000 -5,800,000 -5,700,000 -5,800,000 -5,700,000 -5,800,000 -21,800,000 -21,900,000 -21,900,000 -21,800,000 -21,900,000 -21,900,000 -22,000,000 -21,900,000 -22,000,000 -21,900,000 -20,800,000 -20,800,000 -20,800,000 -20,800,000 -20,800,000 -20,800,000 -20,800,000 -20,800,000 -20,900,000 -20,800,000 -20,800,000 -20,900,000 -19,700,000 -19,700,000 -19,700,000 -19,700,000 -17,300,000 -17,400,000 -17,400,000 -17,400,000 -17,300,000 -17,400,000 -17,400,000 -17,400,000 -17,400,000 -17,300,000 -17,400,000 -17,400,000 -17,400,000 -17,300,000 -17,400,000 -17,400,000 -17,300,000 -17,400,000 -17,400,000 -17,400,000 -17,300,000 -17,400,000 -17,400,000 -17,400,000 -17,400,000 -17,400,000 -17,400,000 -72,400,000         -12,300,000 -12,200,000 -12,300,000 -12,200,000 -12,300,000 -12,200,000 -12,300,000 -12,200,000 
          treasury stock acquired
        		        0 0 -1,500,000 -1,400,000 -1,200,000 0 0 -1,100,000     0 0 0 -1,000,000 0 -1,600,000                       0                            
          net cash from financing activities
        		-76,200,000 26,000,000 -13,200,000 27,100,000 -20,700,000 95,600,000 -22,700,000 -25,700,000 -22,600,000 -21,900,000 -23,600,000 -23,500,000 -24,100,000 -22,100,000 -22,100,000 -23,200,000 -22,000,000 -20,900,000 -22,800,000 -21,000,000 -21,700,000 -20,900,000 -20,800,000 -21,900,000 -21,800,000 -22,700,000 -22,400,000 -21,000,000 -20,800,000 -19,900,000 -19,900,000 -19,800,000 -17,900,000 97,100,000 -28,000,000 7,600,000 -36,800,000 -29,800,000 2,500,000 -9,200,000 -18,400,000 -18,300,000 -18,400,000 -17,000,000 -18,300,000 -17,200,000 -18,400,000 143,500,000 -57,700,000 -103,700,000 -10,000,000 -120,900,000 -55,300,000 -81,800,000 19,400,000 89,600,000 -36,300,000 -107,200,000 -83,100,000 -73,000,000  -51,200,000 7,000,000 17,500,000 -25,000,000 -52,500,000 -15,200,000 42,900,000 11,600,000 -10,800,000 11,400,000 -1,900,000  -14,100,000 -18,800,000 12,200,000 
          cash, cash equivalents and restricted cash - net change from:
        		                                                                            
          operating, investing and financing activities
        		5,700,000 8,600,000 -3,700,000 -87,300,000 16,300,000 -42,000,000 12,100,000 -73,700,000 36,500,000 -12,400,000 -7,900,000 -149,700,000 -20,300,000 -26,200,000 29,600,000 -56,000,000 35,800,000 12,300,000 -11,800,000 24,900,000 200,000 4,200,000 -3,000,000 -45,500,000 1,400,000 63,100,000 -13,100,000 -31,500,000 -52,200,000 -1,200,000 82,000,000 36,800,000 2,700,000 199,700,000 17,300,000 37,300,000 -35,300,000 12,000,000 24,800,000 -38,200,000 -32,200,000 11,300,000 -7,900,000 -38,000,000 21,300,000 -22,400,000 -900,000 125,300,000 -6,900,000 -43,700,000 -1,000,000 -178,500,000 171,400,000 16,800,000 45,300,000 -34,900,000 -28,700,000 41,600,000 -54,000,000 -181,000,000  11,000,000 12,600,000 -6,500,000 -9,100,000 -36,100,000 43,400,000 14,600,000 -13,700,000 14,900,000 -9,200,000 -47,100,000 -16,500,000 42,300,000 -14,000,000 -9,000,000 
          effect of currency exchange rate changes on cash
        		400,000 100,000 2,800,000 1,200,000 -4,500,000 4,600,000 900,000 -1,100,000 3,800,000 -1,900,000 -200,000 -700,000 10,500,000 -6,900,000 -8,300,000 -400,000                                                             
          net change for the year
        		                                                                            
          balance at beginning of year
        		                                                                            
          balance at end of year
        		                                                                            
          supplemental disclosures:
        		                                                                            
          cash paid for:
        		                                                                            
          interest, net of amount capitalized
        		  2,800,000 19,600,000   200,000 7,200,000 0 8,100,000 -200,000 7,900,000    8,300,000 0 8,800,000 0 9,200,000           200,000 9,100,000   4,300,000 4,200,000  4,700,000 4,600,000 4,600,000                                     
          change in accruals for capital expenditures
        		                                                                            
          benefit plan expense less than cash funding
        		 -1,700,000 -1,600,000 -2,900,000  -2,100,000 -1,800,000 -2,800,000                                                                     
          contributions to tio2 manufacturing joint venture
        		         5,500,000 -7,600,000 -700,000  -4,400,000 -300,000 -3,800,000  -2,000,000 3,200,000 -3,400,000  -200,000 -4,100,000 -2,200,000            -3,100,000                                         
          balance at beginning of period
        		 0 0 114,700,000  0 0 202,100,000  0 0 334,600,000  0 0 412,600,000 0 0 0 362,000,000  0 0 392,300,000  0 0 374,700,000  0 0 323,700,000  0 0 52,300,000  0 0 92,500,000  0 0 167,700,000  0 0 53,800,000  0 0 282,700,000  0 0 82,500,000  0 0 304,700,000  0 0 31,100,000    13,600,000         
          balance at end of period
        		 8,700,000 -900,000 28,600,000  -37,400,000 13,000,000 127,300,000  -14,300,000 -8,100,000 184,200,000  -33,100,000 21,300,000 356,200,000 32,900,000 9,500,000 -9,700,000 379,900,000  10,500,000 500,000 342,900,000  57,400,000 -11,100,000 340,600,000  200,000 67,300,000 365,900,000  202,600,000 24,500,000 90,900,000  12,900,000 23,700,000 55,500,000  11,100,000 -5,700,000 121,400,000  -26,700,000 -1,100,000 179,000,000  -42,200,000 -200,000 102,200,000  19,300,000 43,700,000 47,900,000  39,900,000 -54,200,000 126,400,000  12,300,000 11,300,000 22,800,000    27,600,000         
          distributions from tio2 manufacturing joint venture
        		                             700,000    -4,600,000   500,000 -3,500,000   -1,100,000 3,000,000 -6,600,000 11,200,000  -500,000 9,200,000 4,500,000         1,700,000 -900,000 1,900,000 1,100,000  300,000    -3,000,000      1,400,000     
          cash flows from investing activities - capital expenditures
        		  -11,200,000 -12,000,000   -3,400,000 -4,700,000    -16,400,000    -14,200,000                                                             
          accrual for capital expenditures
        		  200,000 3,200,000   -400,000 900,000 300,000 -1,700,000 -3,900,000 6,400,000    3,800,000 700,000 1,900,000 -300,000 2,500,000           -600,000 2,500,000   -100,000 4,200,000 3,200,000 200,000 2,000,000 2,600,000 3,600,000 700,000 500,000 2,000,000 1,400,000 2,500,000 -1,500,000 4,600,000 3,700,000 -700,000   7,700,000 1,300,000   9,400,000 600,000    -2,300,000 2,700,000 1,900,000 4,000,000 -400,000 -500,000 1,300,000 3,200,000 -2,000,000 1,600,000 3,700,000     
          ​
        		                                                                            
          benefit plan expense greater than cash funding
        		            3,900,000 900,000 2,300,000 1,600,000 2,700,000 4,100,000 1,400,000 3,700,000 3,200,000 4,900,000 4,600,000 3,000,000 4,000,000 2,600,000 3,100,000 1,400,000 1,900,000 2,500,000 3,100,000 900,000 2,800,000 4,100,000 1,400,000 3,700,000 1,600,000 2,400,000 -200,000 2,000,000 800,000                                    
          proceeds from insurance settlement
        		                    0 0 0 1,500,000                                                     
          loan to valhi:
        		                                                                            
          loans
        		                        -5,700,000 -3,800,000 -3,800,000 -3,300,000 0 0 -1,800,000 -800,000 -15,400,000                    -83,400,000 -26,700,000 -24,700,000 -43,900,000 -68,100,000 -63,700,000 -44,700,000 -38,200,000                 
          collections
        		                        10,700,000 500,000 3,600,000 1,800,000 0 0 1,800,000 14,400,000 1,800,000                    251,000,000 14,000,000 21,900,000 27,900,000 35,300,000 29,400,000 23,300,000 52,500,000                 
          currency translation
        		                 -2,800,000 2,100,000 -7,000,000  6,300,000 3,500,000 -3,900,000  -5,700,000 2,000,000 -2,600,000  1,400,000 -14,700,000 5,400,000  2,900,000 7,200,000 1,300,000  900,000 -1,100,000 1,200,000  -200,000 2,200,000 -8,300,000  -4,300,000 -200,000 -100,000  1,500,000 800,000 -2,000,000  2,500,000 -1,600,000 300,000  -1,700,000 -200,000 2,700,000  1,300,000 -1,300,000 -1,800,000 -200,000 2,600,000 2,900,000 -600,000 -3,000,000 -1,700,000 100,000 1,100,000 1,800,000 3,700,000 300,000 300,000 
          interest, net of amounts capitalized
        		                                                                         700,000 17,900,000 600,000 
          loss on prepayment of debt
        		                                0                0 2,300,000 0 6,600,000 0 0   -100,000 -100,000 0 3,300,000                 
          payment for termination of interest rate swap contract
        		                                0                                            
          indebtedness:
        		                                                                            
          principal payments
        		                            -1,000,000 -200,000 -200,000 -100,000 0 -448,000,000 -129,200,000 -17,100,000 -75,800,000 -114,100,000 -79,100,000 -1,000,000 -1,000,000 -1,000,000 -1,000,000 -900,000 -900,000 -1,000,000 -1,000,000 -262,300,000 -112,200,000 -175,900,000 -5,300,000 -295,300,000 -108,900,000 -61,800,000 -352,700,000 -400,000 -18,900,000 -89,700,000 -65,700,000 -113,800,000  -23,300,000 -61,800,000 -71,400,000 -93,200,000 -125,700,000 -63,300,000 -51,500,000 -56,400,000 -100,000,000 -88,100,000 -93,500,000 -74,400,000 -87,600,000 -91,900,000 -67,800,000 
          effect of exchange rate changes
        		                                                                            
          depreciation and amortization
        		                            12,800,000 12,400,000 12,200,000 12,300,000 10,500,000 10,500,000 10,100,000 10,100,000 9,800,000 9,900,000 10,600,000 10,200,000 10,000,000 10,500,000 10,600,000 11,000,000 11,600,000 12,300,000 12,700,000 12,600,000 12,600,000 12,600,000 12,400,000 12,600,000 12,400,000 11,500,000 12,000,000 11,900,000 11,600,000 12,100,000 12,200,000 11,600,000 -33,100,000 10,800,000 11,000,000 11,600,000 12,700,000 12,000,000 11,300,000 11,000,000 11,100,000 13,500,000 13,700,000 13,000,000 12,800,000 12,100,000 12,200,000 11,800,000 
          securities transactions
        		                                        0                                    
          cash flows from investing activities -
        		                                                                            
          cash, cash equivalents and restricted cash – net change from:
        		                                                                            
          security transactions
        		                                                                            
          change in restricted cash
        		                                     300,000 -200,000 600,000 -400,000 200,000 -200,000 700,000 -300,000 300,000 6,600,000 600,000    700,000    -1,600,000                     
          cash and cash equivalents - net change from:
        		                                                                            
          net loss
        		                                                                            
          supplemental disclosures -
        		                                                                            
          effect of exchange rate changes on cash
        		                                                                            
          supplemental disclosures –
        		                                                                            
          interest, net of capitalized interest
        		                                         3,000,000 4,500,000 4,400,000  3,300,000 4,400,000 3,100,000                             
          call premium paid
        		                                                        0 0 0 -2,500,000                 
          distributions from (contributions to) tio2 manufacturing joint
        		                                                                            
          venture
        		                                                                            
          proceeds from sale of marketable securities:
        		                                                                            
          timet common stock
        		                                                                            
          mutual funds
        		                                                        -200,000 -31,300,000 -43,500,000 -197,800,000                 
          interest (including call premium), net of amounts capitalized
        		                                                                            
          benefit plan expense greater (less) than cash funding:
        		                                                                            
          defined benefit plan expense
        		                                                                            
          other postretirement benefit plans
        		                                              -100,000 -200,000                             
          defined benefit plan expense greater (less) than cash funding
        		                                               -1,700,000                             
          marketable security transaction losses
        		                                                                            
          defined benefit pension plans
        		                                                7,100,000 2,100,000   -3,700,000 800,000 -500,000 -100,000 300,000 1,200,000 1,200,000 -2,000,000  800,000 -500,000 1,200,000 1,200,000 700,000 -1,900,000 -1,200,000 -11,200,000 -700,000 -1,500,000 -2,100,000 1,900,000 300,000 1,900,000 -2,000,000 
          purchase of marketable securities:
        		                                                                            
          valhi common stock
        		                                                                            
          kronos worldwide, inc. and subsidiaries
        		                                                                            
          consolidated statements of cash flows
        		                                                                            
          call premium and interest paid on senior notes redeemed
        		                                                     0                       
          benefit plan expense greater than cash funding:
        		                                                                            
          other postretirement benefits
        		                                                 100,000    100,000    0 0 -100,000  100,000 100,000 200,000  100,000    100,000 0 100,000  0   
          change in restricted cash equivalents
        		                                                 200,000    400,000    300,000 -400,000 600,000  100,000 -100,000 500,000  0 -100,000 600,000  300,000 -400,000 700,000 -700,000 300,000 -300,000 600,000 
          loans to valhi:
        		                                                                            
          proceeds from sale of marketable securities – mutual funds
        		                                                     0   24,000,000 65,000,000                   
          cash and cash equivalents – net change from:
        		                                                                            
          interest
        		                                                 4,200,000    6,900,000    1,100,000    300,000 18,200,000 400,000 18,700,000 1,200,000 18,800,000 700,000 18,400,000 1,100,000 21,100,000 1,000,000     
          defined benefit pension plan expense greater (less) than cash funding
        		                                                   1,400,000                         
          proceeds from sale of marketable securities
        		                                                       21,100,000    92,000,000                 
          issuance of common stock
        		                                                                            
          cash and cash equivalents–net change from:
        		                                                                            
          supplemental disclosures – cash paid for:
        		                                                                            
          timet stock
        		                                                         0 -10,000,000 -20,400,000                 
          valhi stock
        		                                                         0 -8,200,000 -4,600,000                 
          capital lease obligation incurred
        		                                                                2,300,000 0           
          note payable to affiliate – contran:
        		                                                                            
          cash distributions from subsidiaries
        		                                                                            
          equity in earnings of subsidiaries
        		                                                                            
          net change in assets and liabilities
        		                                                                            
          purchase of:
        		                                                                            
          loan from nl industries, inc.
        		                                                                            
          net cash from financing activities:
        		                                                                            
          net change during the year from operating, investing and financing activities
        		                                                                            
          distributions from (contribution to) tio2 manufacturing joint venture
        		                                                               800,000    -1,800,000         
          cash and cash equivalents at beginning of period
        		                                                                 0    0 0 72,200,000  0 0 63,300,000 
          cash and cash equivalents at end of period
        		                                                                 -33,500,000    13,200,000 -9,100,000 26,200,000  46,000,000 -13,700,000 54,600,000 
          distributions from (to) tio2 manufacturing joint venture
        		                                                                            
          accounts and other receivable
        		                                                                            
          distributions from (contributions to) to tio2 manufacturing joint venture
        		                                                                            
          deferred financing costs
        		                                                                            
          securities transaction gain
        		                                                                            
          proceeds from disposal of interest in norwegian smelting operation
        		                                                                            
          net cash used by investing activities
        		                                                                            
          net cash used by financing activities
        		                                                                            
          inventories received as partial consideration for disposal of interest in norwegian smelting operation
        		                                                                            
          call premium paid on prepayment of debt
        		                                                                            
          deferred financing costs paid
        		                                                                            
          supplemental disclosures - cash paid for:
        		                                                                            
          distribution from (contributions to) tio2 manufacturing joint venture
        		                                                                           1,000,000 
          benefit plan expense less than cash funding:
        		                                                                            
          noncash interest expense
        		                                                                            
          minority interest
        		                                                                            
          net loss from disposition of property and equipment
        		                                                                            
          purchase of interest in subsidiary
        		                                                                            
          change in restricted cash equivalents and restricted marketable debt securities
        		                                                                            
          repayment of loans from affiliates
        		                                                                            
          cash and cash equivalents - net change from: - sum