7Baggers
Quarterly
Annual
    Unit: USD2025-09-30 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 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 
      
                                                                                         
      assets
                                                                                         
      current assets:
                                                                                         
      cash and cash equivalents
    17,200,000 13,100,000 21,300,000 18,400,000 45,700,000 70,400,000 101,600,000 82,400,000 44,600,000 19,800,000 31,500,000 57,400,000 129,300,000 235,200,000 261,000,000 303,200,000 295,700,000 283,100,000 128,000,000 780,300,000 750,100,000 710,600,000 307,200,000 264,300,000 172,100,000 122,400,000 115,300,000 125,600,000 94,300,000 164,000,000 135,000,000 51,100,000 73,900,000 57,100,000 34,400,000 55,200,000 72,900,000 195,300,000 70,700,000 72,500,000 82,600,000 54,300,000 220,900,000 177,700,000 212,300,000 174,200,000 185,600,000 169,500,000 224,600,000 281,700,000 248,000,000 273,400,000 255,600,000 317,800,000 77,300,000 49,800,000 23,600,000 59,800,000 55,900,000  143,700,000 134,400,000 135,500,000 30,300,000 34,600,000 14,600,000 3,300,000 200,000 1,100,000 27,400,000 47,500,000 68,700,000 101,400,000 70,900,000 51,800,000 50,000,000 52,700,000 37,300,000 38,500,000 49,500,000 43,300,000 54,300,000 24,500,000 55,400,000 31,900,000 
      receivables:
                                                               135,600,000                          
      trade receivables
    388,900,000 378,700,000 347,400,000 319,700,000 370,200,000 370,100,000 341,400,000 325,200,000 351,500,000 363,600,000 365,000,000 297,200,000 311,500,000 351,100,000 432,200,000 332,700,000 361,600,000 389,200,000 305,800,000 112,800,000 119,000,000 126,400,000 175,200,000 167,100,000 188,100,000 178,100,000 195,800,000 179,800,000 194,500,000 191,200,000 185,300,000 165,000,000 138,200,000 145,600,000                                                    
      other
    32,300,000 39,100,000 42,500,000 22,000,000 900,000 13,400,000 11,200,000 12,400,000 7,600,000 25,300,000 42,600,000 73,500,000 56,900,000 49,500,000 50,600,000 53,000,000 44,500,000 38,900,000 31,500,000 11,600,000 22,800,000 22,000,000 22,600,000 18,100,000 26,100,000 25,100,000 22,400,000 25,600,000 24,400,000 18,900,000 18,200,000 15,500,000 15,400,000 10,700,000 11,800,000 11,900,000 7,300,000 8,200,000 8,600,000 6,100,000 4,400,000 5,900,000 8,800,000 10,900,000 10,400,000 11,000,000 11,700,000 13,400,000 14,500,000 11,600,000 11,800,000 3,400,000 1,700,000 1,900,000 1,300,000 1,200,000 1,900,000 3,800,000 3,300,000 5,200,000 5,200,000 5,000,000 4,000,000 2,200,000 3,000,000 3,100,000 9,300,000 17,500,000 8,700,000 8,300,000 8,800,000 6,300,000 4,800,000 7,000,000 6,300,000 6,300,000 6,900,000 5,700,000  6,900,000   5,200,000   
      contract assets
    54,000,000 69,100,000 67,900,000 73,400,000 62,000,000 63,700,000 63,000,000 58,500,000 52,600,000 56,300,000 52,900,000 58,600,000 51,000,000 93,900,000 74,900,000 63,200,000 40,200,000 46,600,000 44,400,000 36,100,000 34,800,000 41,600,000 47,100,000 54,600,000 46,100,000 46,900,000 58,400,000 54,900,000 51,000,000 52,600,000 57,500,000                                                       
      inventories
    702,300,000 595,600,000 572,400,000 503,900,000 473,900,000 446,900,000 471,300,000 477,200,000 488,600,000 497,900,000 537,700,000 525,400,000 538,100,000 468,600,000 431,500,000 404,600,000 413,600,000 383,200,000 385,300,000 152,000,000 157,500,000 181,400,000 194,600,000 177,600,000 192,500,000 231,100,000 233,900,000 215,100,000 196,200,000 177,200,000 176,800,000 207,900,000 212,200,000 199,900,000 203,500,000 201,600,000 223,600,000 217,500,000 210,600,000 219,600,000 217,300,000 217,300,000 218,000,000 214,700,000 211,300,000 198,100,000 203,100,000 214,400,000 207,900,000 202,900,000 199,300,000 186,000,000 189,000,000 196,800,000 198,200,000 205,700,000 194,600,000 178,200,000 169,600,000 167,500,000 153,300,000 146,700,000 131,400,000 125,200,000 125,600,000 128,100,000 135,000,000 172,300,000 269,200,000 238,200,000 216,700,000 207,600,000 193,700,000 194,000,000 180,800,000 188,100,000 181,300,000 123,100,000 137,600,000 115,300,000 100,700,000 115,200,000 105,800,000 105,300,000 131,400,000 
      prepaid expenses and other current assets
    49,500,000 55,000,000 42,300,000 39,000,000 42,200,000 46,000,000 34,600,000 34,500,000 39,500,000 33,700,000 30,200,000 30,500,000 40,900,000 47,600,000 71,200,000 48,700,000 67,700,000 59,600,000 35,800,000 28,600,000 25,400,000 25,700,000 20,400,000 19,400,000 18,400,000 21,700,000 23,000,000 18,900,000 24,200,000 29,000,000 25,700,000 33,400,000 31,500,000 26,800,000 34,000,000     56,700,000 98,600,000 100,400,000 195,800,000 178,600,000 156,400,000 135,500,000 48,600,000 44,200,000 67,600,000 70,100,000 71,000,000 70,100,000 73,100,000 74,700,000 75,300,000 78,900,000 58,900,000 78,800,000 90,300,000 80,100,000 63,400,000 53,000,000 62,500,000 59,100,000 93,000,000 102,100,000 116,500,000 128,400,000 73,500,000 82,600,000 81,800,000 66,000,000 13,800,000 20,400,000 30,800,000 40,800,000 27,700,000 34,000,000 29,100,000 21,000,000 13,700,000 14,300,000 33,800,000 19,600,000 36,600,000 
      total current assets
    1,244,200,000 1,150,600,000 1,093,800,000 976,400,000 994,900,000 1,010,500,000 1,023,100,000 990,200,000 984,400,000 996,600,000 1,059,900,000 1,042,600,000 1,127,700,000 1,245,900,000 1,321,400,000 1,205,400,000 1,223,300,000 1,200,600,000 930,800,000 1,121,400,000 1,109,600,000 1,107,700,000 806,400,000 779,800,000 668,600,000 649,700,000 671,100,000 656,600,000 673,000,000 704,800,000 682,300,000 656,600,000 662,600,000 615,800,000 636,200,000 655,900,000 657,900,000 640,400,000 447,800,000 501,600,000 564,500,000 546,500,000 823,200,000 825,200,000 822,900,000 769,100,000 677,000,000 690,800,000 752,600,000 736,300,000 757,500,000 741,700,000 755,700,000 722,500,000 482,200,000 434,500,000 408,100,000 439,700,000 433,100,000 471,400,000 455,800,000 432,600,000 429,400,000 300,700,000 337,300,000 322,100,000 334,800,000 428,700,000 467,900,000 470,900,000 476,000,000 454,600,000 425,800,000 409,000,000 385,400,000 384,900,000 377,900,000 314,200,000  287,300,000   312,600,000   
      property, plant and equipment
    1,199,800,000 1,204,900,000 1,191,600,000 1,161,200,000 1,100,400,000 1,084,600,000 1,055,000,000 1,052,100,000 1,057,500,000 1,041,000,000 1,037,800,000 1,013,200,000 989,600,000 956,300,000 960,200,000 955,200,000 948,700,000 951,900,000 1,006,600,000 627,200,000 622,900,000 627,100,000 630,900,000 622,000,000 614,300,000 613,800,000 610,900,000 611,800,000 595,400,000 584,200,000 578,700,000 571,400,000 557,800,000 552,100,000                                                    
      operating lease assets
    24,100,000 24,800,000 25,500,000 27,200,000 27,600,000 29,100,000 30,500,000 32,600,000 34,600,000 36,900,000 38,800,000 39,100,000 41,400,000 43,400,000 44,900,000 46,200,000 45,200,000 39,500,000 38,900,000 26,500,000 27,200,000 28,000,000 28,800,000 25,800,000 26,300,000 26,800,000 27,400,000                                                           
      deferred tax assets
    1,400,000 2,600,000 3,300,000 7,200,000 6,300,000 6,000,000 5,400,000 6,000,000 5,000,000 5,100,000 4,500,000 7,500,000 6,600,000 6,300,000 3,200,000 3,400,000  1,200,000     2,000,000 11,800,000 6,300,000 15,500,000 22,400,000 35,900,000 42,200,000 51,500,000 63,700,000 72,000,000 118,700,000 138,300,000                                                    
      intangible assets
    42,100,000 43,200,000 44,400,000 45,500,000 46,600,000 47,700,000 48,900,000 50,000,000 51,100,000 52,500,000 53,900,000 55,300,000 56,700,000 58,100,000 64,200,000 67,700,000 70,500,000 79,600,000 82,500,000 26,700,000 27,400,000 28,100,000 28,900,000 29,600,000 30,300,000 31,000,000 31,700,000 32,400,000 33,000,000 24,300,000 24,600,000 25,000,000 25,300,000 25,700,000                          4,000,000 4,200,000                         
      goodwill
    18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 39,300,000 39,300,000 39,300,000 39,300,000 39,300,000 39,300,000 46,200,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 44,000,000 44,000,000 44,000,000 44,000,000 43,400,000 18,800,000 18,800,000 18,800,000 18,800,000 18,800,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 37,200,000 3,100,000 3,100,000                 11,400,000 11,400,000 11,400,000      
      other assets
    61,700,000 67,900,000 62,200,000 78,600,000 116,800,000 119,000,000 118,100,000 117,700,000 116,700,000 116,600,000 116,000,000 112,300,000 112,300,000 112,400,000 108,200,000 105,200,000 110,200,000 102,400,000 47,800,000 44,100,000 41,100,000 38,700,000 37,300,000 38,400,000 36,500,000 41,300,000 40,300,000 38,600,000 39,000,000 40,200,000 37,300,000 41,400,000 39,500,000 36,000,000 37,100,000     22,800,000 22,100,000 23,100,000 23,000,000 23,300,000 23,800,000 24,000,000 108,500,000 104,800,000 109,100,000 78,500,000 88,800,000 86,000,000 84,200,000 73,800,000 63,000,000 72,300,000 64,800,000 80,900,000 74,000,000 83,000,000 76,000,000 62,900,000 81,000,000 41,200,000 33,000,000 38,600,000 55,900,000 50,500,000 50,500,000 76,500,000 67,800,000 43,100,000 39,600,000 42,700,000 37,600,000 40,900,000 39,000,000 43,600,000 43,100,000 38,700,000 46,000,000 47,700,000 43,600,000 42,500,000 488,100,000 
      total assets
    2,592,100,000 2,512,800,000 2,439,600,000 2,314,900,000 2,311,400,000 2,315,700,000 2,299,800,000 2,267,400,000                                                                              
      liabilities and stockholders’ equity
                                                                                         
      current liabilities:
                                                                                         
      accounts payable
    392,800,000 317,800,000 289,700,000 266,900,000 275,400,000 281,800,000 273,800,000 252,700,000 243,200,000 236,200,000 282,300,000 305,100,000 337,300,000 418,800,000 442,800,000 351,400,000 340,700,000 344,100,000 259,600,000 86,100,000 63,400,000 61,000,000 113,900,000 92,000,000 93,800,000 101,300,000 124,400,000 121,400,000 120,400,000 132,000,000 120,200,000 90,000,000 94,400,000 84,200,000 84,400,000 75,800,000 69,600,000 72,300,000 70,200,000 76,700,000 69,300,000 77,400,000 83,100,000 81,400,000 89,300,000 72,100,000 72,300,000 62,900,000 71,300,000 73,200,000 73,200,000 62,500,000 66,000,000 66,500,000 65,400,000 62,200,000 62,300,000 73,700,000 63,700,000 50,800,000 48,700,000 51,400,000 58,100,000 49,000,000 49,800,000 37,700,000 32,300,000 52,400,000 70,200,000 72,300,000 79,600,000 70,100,000 65,300,000 65,300,000 62,700,000 73,200,000 61,700,000 56,100,000  51,400,000   44,700,000   
      accrued salaries, wages and related expenses
    58,400,000 53,300,000 53,400,000 54,300,000 51,900,000 48,900,000 45,500,000 53,000,000 50,700,000 48,100,000 42,700,000 45,200,000 42,400,000 41,400,000 40,900,000 46,900,000 48,900,000 39,900,000 31,900,000 30,800,000 33,500,000 34,900,000 28,300,000 34,400,000 31,900,000 30,400,000 28,200,000 40,100,000 35,100,000 32,200,000 28,700,000 42,600,000 39,000,000 34,600,000 29,100,000 49,100,000 42,800,000 36,400,000 33,900,000 39,800,000 38,400,000 34,400,000 33,600,000 39,600,000                                          
      other accrued liabilities
    49,500,000 55,100,000 66,900,000 79,400,000 54,900,000 65,700,000 65,400,000 64,300,000 73,100,000 70,400,000 80,900,000 68,400,000 88,500,000 87,300,000 70,900,000 58,400,000 55,200,000 55,500,000 58,900,000 41,400,000 45,300,000 54,500,000 56,900,000 44,000,000 50,100,000 47,200,000 51,600,000 44,000,000 37,000,000 29,900,000 35,600,000 40,500,000 43,300,000 37,500,000 40,400,000 39,900,000 46,700,000 44,200,000 56,500,000 52,700,000 61,400,000 51,600,000 157,200,000 132,800,000 131,700,000 115,100,000 37,100,000 44,800,000 40,900,000 39,900,000 38,400,000 51,900,000 41,900,000 46,300,000 42,600,000 41,000,000 41,000,000 34,400,000 42,500,000 42,000,000 39,400,000 29,200,000 27,700,000 32,100,000 32,800,000 57,200,000 99,700,000 113,900,000 55,300,000 38,900,000 29,700,000 36,600,000 34,000,000 39,600,000 44,100,000 46,900,000 50,900,000 61,000,000  55,200,000   74,200,000   
      total current liabilities
    500,700,000 426,200,000 410,000,000 400,600,000 382,200,000 396,400,000 384,700,000 370,000,000 367,000,000 354,700,000 405,900,000 418,700,000 468,200,000 547,500,000 554,600,000 456,700,000 444,800,000 439,500,000 350,400,000 158,300,000 142,200,000 150,400,000 199,100,000 170,400,000 175,800,000 178,900,000 204,200,000 205,500,000 192,500,000 194,100,000 184,500,000 173,100,000 176,700,000 156,300,000 153,900,000 165,000,000 159,200,000 153,000,000 160,700,000 169,300,000 169,200,000 163,500,000 448,900,000 426,400,000 428,500,000 389,000,000 142,800,000 150,600,000 151,400,000 147,100,000 157,200,000 161,600,000 157,400,000 162,400,000 163,700,000 149,800,000 153,500,000 164,900,000 164,400,000 142,300,000 138,700,000 128,100,000 131,100,000 123,200,000 136,400,000 146,200,000 185,600,000 235,000,000 170,600,000 154,300,000 159,100,000 165,400,000 153,700,000 160,800,000 162,300,000 176,400,000 165,800,000 190,800,000  167,600,000   238,400,000   
      long-term portion of operating lease liabilities
    22,800,000 23,500,000 24,000,000 25,200,000 25,200,000 26,300,000 27,400,000 29,200,000 31,100,000 33,300,000 35,200,000 35,400,000 37,300,000 39,100,000 40,500,000 40,800,000 40,200,000 34,400,000 34,100,000 25,600,000 26,300,000 27,000,000 27,800,000 25,200,000 25,600,000 26,000,000 26,600,000                                                           
      pension and opeb
    70,600,000 71,200,000 72,000,000 71,400,000                                                                                  
      deferred tax liabilities
    64,600,000 55,900,000 50,600,000 24,100,000 23,700,000 20,600,000 19,500,000 13,900,000 8,000,000 6,500,000 5,700,000 4,900,000 4,700,000 3,900,000 17,900,000 10,500,000 15,000,000 4,600,000 15,900,000 13,900,000 8,900,000 7,300,000 4,500,000 4,500,000 4,200,000 4,200,000 4,200,000 4,200,000 4,300,000 4,300,000 4,300,000 4,300,000 3,300,000 3,300,000 3,300,000 3,300,000 2,200,000 2,200,000 2,100,000 2,100,000 800,000 800,000 800,000 900,000                                          
      long-term liabilities
    84,400,000 84,800,000 84,200,000 84,000,000 90,800,000 88,300,000 83,600,000 81,700,000 85,500,000 85,900,000 82,800,000 74,700,000 72,200,000 73,600,000 74,400,000 72,500,000 74,500,000 75,800,000 76,300,000 78,600,000 80,300,000 75,300,000 75,300,000 67,000,000 65,400,000 63,200,000 61,800,000 66,400,000 64,700,000 62,600,000 61,300,000 60,000,000 61,900,000 61,100,000 60,100,000 73,200,000 71,200,000 71,400,000 72,500,000 87,500,000 86,000,000 86,800,000 89,100,000 58,300,000 60,900,000 63,700,000 149,000,000 146,400,000 154,000,000 127,000,000 135,200,000 134,500,000 128,300,000 118,700,000 116,100,000 126,000,000 115,700,000 141,800,000 130,100,000 134,700,000 126,100,000 98,900,000 108,200,000 53,700,000 48,900,000 59,300,000 72,000,000 65,300,000 54,400,000 57,500,000 60,000,000 57,000,000 68,200,000 62,800,000 60,400,000 58,300,000 59,400,000 49,000,000 47,200,000 42,000,000 41,100,000 37,400,000 33,300,000 32,900,000 44,500,000 
      long-term debt
    1,042,900,000 1,075,200,000 1,042,000,000 1,041,600,000 1,041,200,000 1,040,700,000 1,040,300,000 1,039,800,000 1,039,400,000 1,053,900,000 1,077,900,000 1,038,100,000 1,037,600,000 1,037,200,000 1,036,800,000 1,036,300,000 1,035,900,000 1,035,500,000 838,700,000 838,100,000 837,600,000 837,100,000 492,800,000 492,600,000 371,100,000 370,900,000 370,600,000 370,400,000 370,200,000 370,000,000 369,800,000 369,600,000 369,400,000 369,200,000 368,900,000     197,800,000 218,900,000 225,000,000 225,000,000 225,000,000 225,000,000 225,000,000 390,700,000 388,500,000 386,400,000 384,300,000 382,300,000 380,300,000 378,400,000 376,600,000                   50,000,000 50,000,000 50,000,000 50,000,000 50,000,000 1,200,000 1,200,000 1,200,000 1,200,000 1,200,000 2,800,000 2,800,000 2,200,000 
      total liabilities
    1,786,000,000 1,736,800,000 1,682,800,000 1,646,900,000 1,644,400,000 1,653,700,000 1,634,900,000 1,615,200,000 1,627,400,000 1,629,400,000 1,694,100,000 1,657,600,000 1,731,600,000 1,811,700,000 1,833,200,000 1,729,900,000 1,716,200,000 1,693,800,000 1,417,800,000 1,132,300,000 1,127,700,000 1,129,600,000 832,000,000 792,300,000 674,900,000 675,800,000 699,900,000 678,900,000 663,500,000 662,800,000 651,800,000 638,900,000 639,100,000 617,900,000 614,500,000 638,800,000 619,300,000 613,300,000 448,800,000 475,700,000 490,800,000 492,500,000 780,600,000 727,800,000 715,600,000 678,900,000 683,700,000 686,700,000 696,900,000 662,900,000 679,600,000 681,700,000 684,000,000 677,800,000 453,000,000 447,800,000 419,200,000 458,900,000 445,400,000 430,200,000                          
      commitments and contingencies – note 7
                                                                                         
      stockholders’ equity:
                                                                                         
      preferred stock, 5,000,000 shares authorized at both september 30, 2025 and december 31, 2024; no shares were issued and outstanding at september 30, 2025 and december 31, 2024
                                                                                         
      common stock
    200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 800,000 800,000 800,000 800,000 800,000 800,000 800,000 800,000 
      additional paid in capital
    1,128,000,000 1,124,100,000 1,119,400,000 1,117,000,000 1,114,600,000 1,111,000,000 1,107,500,000 1,104,700,000 1,100,400,000 1,096,600,000 1,092,500,000 1,090,400,000 1,087,200,000 1,084,800,000 1,081,000,000 1,078,900,000 1,076,600,000 1,073,200,000 1,069,300,000 1,068,600,000 1,066,000,000 1,063,300,000 1,060,300,000 1,062,900,000 1,061,500,000 1,059,200,000 1,056,700,000 1,059,300,000 1,057,400,000 1,054,700,000 1,051,800,000 1,055,900,000 1,052,800,000 1,049,300,000 1,046,000,000     1,036,500,000 1,033,600,000 1,031,400,000 1,029,100,000 1,028,500,000 1,026,900,000 1,026,000,000 1,023,600,000 1,023,100,000 1,022,400,000 1,021,100,000 1,018,900,000 1,017,700,000 1,017,000,000                                 
      retained earnings
    127,100,000 100,400,000 90,000,000 6,200,000 11,800,000 12,500,000 22,100,000 10,100,000 15,200,000 22,400,000 16,700,000 13,300,000 52,200,000 62,200,000 88,600,000 93,000,000 103,000,000 116,900,000 151,000,000 158,200,000 163,000,000 173,400,000 190,600,000 172,800,000 193,000,000 177,300,000 168,000,000 150,200,000 135,600,000 123,100,000 111,700,000 85,500,000 109,000,000 97,600,000 101,900,000     15,900,000 9,700,000   280,400,000 271,100,000 261,400,000 243,200,000 233,800,000 212,200,000 191,800,000 179,000,000 151,200,000 146,900,000 122,600,000 106,500,000 84,400,000 86,200,000 86,600,000 86,700,000 80,100,000 85,100,000 84,300,000 88,900,000 85,000,000 65,800,000 47,800,000 33,100,000 34,100,000 142,400,000 169,300,000 151,500,000 116,100,000 95,400,000 78,000,000 43,300,000 26,200,000 14,300,000         
      treasury stock
    -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -475,900,000 -463,400,000 -460,100,000 -448,100,000 -437,900,000 -420,500,000 -390,900,000 -378,000,000 -364,700,000 -358,600,000 -345,700,000 -344,000,000 -314,100,000 -281,400,000 -260,300,000 -255,100,000 -252,900,000 -246,500,000 -242,500,000 -238,600,000 -227,100,000 -197,100,000 -181,100,000 -176,200,000 -164,900,000 -152,200,000 -116,800,000 -112,800,000 -88,500,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -72,300,000 -28,100,000 -28,100,000 -28,100,000 -28,100,000 -28,100,000 -28,100,000    -600,000 -300,000            
      aoci
    26,700,000 27,200,000 23,100,000                                                                                   
      total stockholders’ equity
    806,100,000 776,000,000 756,800,000 668,000,000 667,000,000 662,000,000 664,900,000 652,200,000 640,700,000 638,100,000 635,600,000 631,200,000 642,000,000 650,000,000 708,200,000 692,500,000 721,000,000 720,700,000 735,000,000  719,300,000           746,300,000    804,700,000    774,400,000 772,300,000 758,800,000 754,300,000 1,015,900,000 1,100,700,000 1,093,700,000 1,082,300,000 1,084,200,000 1,095,100,000 1,076,800,000 1,084,800,000 1,070,800,000 1,010,300,000 983,600,000 937,300,000 872,800,000 962,100,000 960,900,000 925,400,000 912,200,000 907,700,000 901,400,000 887,500,000 901,200,000 826,200,000 807,000,000 790,300,000 788,100,000 950,600,000 1,001,000,000 980,500,000 942,800,000 533,600,000 499,900,000 444,900,000 370,700,000 345,900,000 -3,105,300,000  -3,141,200,000   -2,378,000,000   
      total liabilities and stockholders' equity
    2,592,100,000 2,512,800,000 2,439,600,000 2,314,900,000 2,311,400,000 2,315,700,000 2,299,800,000 2,267,400,000                                                                              
      preferred stock, 5,000,000 shares authorized at both june 30, 2025 and december 31, 2024; no shares were issued and outstanding at june 30, 2025 and december 31, 2024
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2025 and december 31, 2024; no shares were issued and outstanding at march 31, 2025 and december 31, 2024
                                                                                         
      net liabilities of salaried veba
        3,700,000 3,800,000 3,800,000 3,800,000 17,000,000 16,900,000 16,700,000 16,500,000 19,800,000 20,000,000 20,300,000 20,600,000 16,600,000 17,000,000 17,400,000 17,800,000 32,400,000 32,500,000 32,500,000 32,600,000 32,800,000 32,600,000 32,500,000 32,400,000 31,800,000 31,800,000 31,900,000 31,900,000 27,800,000 28,000,000 28,300,000 28,600,000 18,200,000 18,500,000 18,700,000 19,000,000 15,900,000 16,400,000 16,800,000                                           
      commitments and contingencies – note 10
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2024 and december 31, 2023; no shares were issued and outstanding at december 31, 2024 and december 31, 2023
                                                                                         
      accumulated other comprehensive income
       20,500,000 16,300,000 14,200,000 11,000,000 13,100,000 800,000 -5,200,000 2,100,000 3,200,000   14,300,000  17,100,000 6,300,000                                       1,800,000 1,400,000 1,400,000 1,700,000          -5,300,000 -5,000,000 -6,000,000 4,400,000 6,000,000 7,900,000 7,900,000  -8,800,000 -8,800,000 -8,800,000 -10,000,000 -9,000,000 -7,600,000 -5,500,000 -8,100,000 
      pension and other postretirement benefits
        77,600,000 77,600,000 75,600,000 76,800,000 79,400,000 78,200,000 69,900,000 69,300,000 91,800,000 90,400,000 88,700,000 92,500,000 89,200,000 87,000,000 85,000,000                                                                   
      preferred stock, 5,000,000 shares authorized at both september 30, 2024 and december 31, 2023; no shares were issued and outstanding at september 30, 2024 and december 31, 2023
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2024 and december 31, 2023; no shares were issued and outstanding at june 30, 2024 and december 31, 2023
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2024 and december 31, 2023; no shares were issued and outstanding at march 31, 2024 and december 31, 2023
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2023 and december 31, 2022; no shares were issued and outstanding at december 31, 2023 and december 31, 2022
                                                                                         
      total
            2,268,100,000 2,267,500,000 2,329,700,000 2,288,800,000 2,373,600,000 2,461,700,000 2,541,400,000 2,422,400,000 2,437,200,000 2,414,500,000 2,152,800,000 1,864,700,000 1,847,000,000 1,848,400,000 1,553,100,000 1,526,200,000 1,426,300,000 1,422,100,000 1,447,800,000 1,419,300,000 1,426,000,000 1,423,800,000 1,405,400,000 1,385,200,000 1,422,700,000 1,386,700,000 1,413,100,000 1,443,500,000 1,433,400,000 1,421,600,000 1,236,600,000 1,250,100,000 1,263,100,000 1,251,300,000 1,534,900,000 1,743,700,000 1,816,300,000 1,772,600,000 1,766,000,000 1,770,900,000 1,792,000,000 1,739,700,000 1,764,400,000 1,752,500,000 1,694,300,000 1,661,400,000 1,390,300,000 1,320,600,000 1,381,300,000 1,419,800,000 1,370,800,000 1,342,400,000 1,325,700,000 1,274,800,000 1,271,400,000 1,085,500,000 1,035,500,000 1,035,500,000 1,069,800,000 1,145,400,000 1,210,300,000 1,212,800,000 1,199,600,000 1,165,200,000 805,500,000 773,500,000 717,600,000 655,400,000 621,100,000 1,597,900,000  1,538,900,000   1,876,500,000   
      preferred stock, 5,000,000 shares authorized at both september 30, 2023 and december 31, 2022; no shares were issued and outstanding at september 30, 2023 and december 31, 2022
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2023 and december 31, 2022; no shares were issued and outstanding at june 30, 2023 and december 31, 2022
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2023 and december 31, 2022; no shares were issued and outstanding at march 31, 2023 and december 31, 2022
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2022 and december 31, 2021; no shares were issued and outstanding at december 31, 2022 and december 31, 2021
                                                                                         
      commitments and contingencies – note 6
                                                                                         
      preferred stock, 5,000,000 shares authorized at both september 30, 2022 and december 31, 2021; no shares were issued and outstanding at september 30, 2022 and december 31, 2021
                                                                                         
      accumulated other comprehensive loss
                -21,700,000 -21,300,000  -3,700,000   -9,600,000 -18,700,000 -34,000,000 -42,200,000 -54,100,000 -38,600,000 -43,200,000 -42,300,000 -39,100,000 -48,800,000 -39,800,000 -39,000,000 -45,400,000 -36,700,000 -32,700,000 -34,300,000 -35,400,000 -36,700,000 -28,800,000 -29,900,000 -30,800,000 -31,700,000 -28,700,000 -28,800,000 -29,200,000 -96,100,000 -16,400,000 -17,700,000 -19,800,000 -20,700,000 -22,900,000 -23,500,000 -24,800,000 -26,000,000 -81,500,000 -82,400,000 -83,900,000 -85,000,000     -7,300,000 -7,100,000 -7,500,000 -7,300,000 -62,300,000 -61,400,000 -59,800,000 -60,300,000 -4,600,000                 
      preferred stock, 5,000,000 shares authorized at both june 30, 2022 and december 31, 2021; no shares were issued and outstanding at june 30, 2022 and december 31, 2021
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2022 and december 31, 2021; no shares were issued and outstanding at march 31, 2022 and december 31, 2021
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2021 and december 31, 2020; no shares were issued and outstanding at december 31, 2021 and december 31, 2020
                                                                                         
      commitments and contingencies – note 8
                                                                                         
      preferred stock, 5,000,000 shares authorized at both september 30, 2021 and december 31, 2020; no shares were issued and outstanding at september 30, 2021 and december 31, 2020
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2021 and december 31, 2020; no shares were issued and outstanding at june 30, 2021 and december 31, 2020
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2021 and december 31, 2020; no shares were issued and outstanding at march 31, 2021 and december 31, 2020
                                                                                         
      short-term investments
                          39,300,000 78,700,000 25,300,000 24,400,000 22,300,000 36,700,000 88,400,000 71,900,000 83,800,000 183,700,000 191,400,000 175,700,000 195,500,000 231,000,000 201,000,000 72,000,000 10,000,000 30,000,000 30,000,000 30,000,000 30,000,000 114,000,000 100,100,000 127,200,000 104,500,000 129,500,000 115,900,000 47,300,000 85,600,000 85,000,000 79,900,000                                 
      liabilities and stockholders' equity
                                                                                         
      stockholders' equity:
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2020 and december 31, 2019; no shares were issued and outstanding at december 31, 2020 and december 31, 2019
                                                                                         
      total stockholders' equity
                       732,400,000  718,800,000 721,100,000 733,900,000 751,400,000 746,300,000 747,900,000 740,400,000 762,500,000 761,000,000 753,600,000  783,600,000 768,800,000 798,600,000  814,100,000 808,300,000 787,800,000                                               
      preferred stock, 5,000,000 shares authorized at both september 30, 2020 and december 31, 2019; no shares were issued and outstanding at september 30, 2020 and december 31, 2019
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2020 and december 31, 2019; no shares were issued and outstanding at june 30, 2020 and december 31, 2019
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2020 and december 31, 2019; no shares were issued and outstanding at march 31, 2020 and december 31, 2019
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2019 and december 31, 2018; no shares were issued and outstanding at december 31, 2019 and december 31, 2018
                                                                                         
      preferred stock, 5,000,000 shares authorized at both september 30, 2019 and december 31, 2018; no shares were issued and outstanding at september 30, 2019 and december 31, 2018
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2019 and december 31, 2018; no shares were issued and outstanding at june 30, 2019 and december 31, 2018
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2019 and december 31, 2018; no shares were issued and outstanding at march 31, 2019 and december 31, 2018
                                                                                         
      commitments and contingencies – note 9
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2018 and december 31, 2017; no shares were issued and outstanding at december 31, 2018 and december 31, 2017
                                                                                         
      preferred stock, 5,000,000 shares authorized at both september 30, 2018 and december 31, 2017; no shares were issued and outstanding at september 30, 2018 and december 31, 2017
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2018 and december 31, 2017; no shares were issued and outstanding at june 30, 2018 and december 31, 2017
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2018 and december 31, 2017; no shares were issued and outstanding at march 31, 2018 and december 31, 2017
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2017 and december 31, 2016; no shares were issued and outstanding at december 31, 2017 and december 31, 2016
                                                                                         
      preferred stock, 5,000,000 shares authorized at both september 30, 2017 and december 31, 2016; no shares were issued and outstanding at september 30, 2017 and december 31, 2016
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2017 and december 31, 2016; no shares were issued and outstanding at june 30, 2017 and december 31, 2016
                                                                                         
      trade receivables – net
                                      157,000,000 137,700,000 142,200,000 134,600,000 138,800,000 116,700,000 131,600,000 138,600,000 149,700,000                                           
      property, plant and equipment – net
                                      535,800,000 530,900,000 518,600,000 512,700,000 504,500,000 495,400,000 472,700,000 464,500,000 458,100,000                                           
      deferred tax assets – net
                                      140,800,000     162,600,000 135,700,000 148,700,000 161,700,000  26,700,000 45,800,000 59,200,000  61,600,000 75,800,000 87,000,000  139,700,000 156,300,000 186,900,000  201,800,000 197,700,000                            
      intangible assets – net
                                      26,000,000 26,400,000 26,700,000 29,700,000 30,100,000 30,500,000 30,900,000 31,300,000 31,700,000  32,500,000 32,900,000 33,300,000  34,100,000 34,500,000 35,000,000  35,900,000 36,300,000 36,800,000  37,800,000 38,300,000                            
      preferred stock, 5,000,000 shares authorized at both march 31, 2017 and december 31, 2016; no shares were issued and outstanding at march 31, 2017 and december 31, 2016
                                                                                         
      prepaid expenses and other current assets1
                                       18,500,000 10,900,000 12,800,000 9,100,000                                               
      deferred tax assets – net1, 2
                                       159,700,000 170,900,000 180,900,000 197,500,000                                               
      other assets1
                                       33,400,000 22,100,000 20,700,000 19,500,000                                               
      short-term capital leases
                                       200,000 100,000 100,000 100,000 100,000 100,000 100,000  100,000 100,000   200,000                                      
      long-term debt1
                                       368,700,000 368,500,000 368,200,000 194,800,000                                               
      preferred stock, 5,000,000 shares authorized at both december 31, 2016 and december 31, 2015; no shares were issued and outstanding at december 31, 2016 and december 31, 2015
                                                                                         
      additional paid in capital2
                                       1,047,400,000 1,044,300,000 1,041,200,000 1,037,200,000                                               
      retained earnings2
                                       75,200,000 58,700,000 51,900,000 34,100,000                                               
      preferred stock, 5,000,000 shares authorized at both september 30, 2016 and december 31, 2015; no shares were issued and outstanding at september 30, 2016 and december 31, 2015
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2016 and december 31, 2015; no shares were issued and outstanding at june 30, 2016 and december 31, 2015
                                                                                         
      preferred stock, 5,000,000 shares authorized at both march 31, 2016 and december 31, 2015; no shares were issued and outstanding at march 31, 2016 and december 31, 2015
                                                                                         
      net assets of union veba
                                                                                         
      current portion of long-term debt
                                              175,000,000 172,500,000 170,200,000 167,900,000                                        
      preferred stock, 5,000,000 shares authorized at both december 31, 2015 and december 31, 2014; no shares were issued and outstanding at december 31, 2015 and december 31, 2014
                                                                                         
      preferred stock, 5,000,000 shares authorized at both september 30, 2015 and december 31, 2014; no shares were issued and outstanding at september 30, 2015 and december 31, 2014
                                                                                         
      preferred stock, 5,000,000 shares authorized at both june 30, 2015 and december 31, 2014; no shares were issued and outstanding at june 30, 2015 and december 31, 2014
                                                                                         
      (accumulated deficit) retained earnings
                                             -5,400,000 -18,700,000                                           
      preferred stock, 5,000,000 shares authorized at both march 31, 2015 and december 31, 2014; no shares were issued and outstanding at march 31, 2015 and december 31, 2014
                                                                                         
      trade receivables — net
                                               129,300,000                                          
      property, plant and equipment — net
                                               454,900,000                                          
      net asset of vebas
                                               340,100,000   414,100,000                                       
      deferred tax assets — net
                                               30,900,000    69,100,000    102,000,000    226,900,000   221,000,000 231,100,000 250,100,000 254,800,000 265,600,000 277,200,000 278,000,000 295,700,000 312,500,000 313,300,000 246,500,000 232,800,000 244,000,000 268,600,000              
      intangible assets — net
                                               32,100,000    33,700,000    35,400,000    37,200,000   38,800,000                           
      net liability of veba
                                               17,200,000                                          
      commitments and contingencies — note 9
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2014 and december 31, 2013; no shares were issued and outstanding at december 31, 2014 and december 31, 2013
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at september 30, 2014 and december 31, 2013
                                                132,400,000                                         
      property, plant, and equipment – net
                                                442,900,000 441,400,000 436,700,000  411,700,000 398,300,000 386,400,000  374,700,000 373,000,000 370,800,000  363,800,000 360,400,000                            
      net assets of vebas
                                                430,300,000 422,200,000                                        
      accrued salaries, wages, and related expenses
                                                37,200,000 33,800,000 33,200,000 42,700,000 39,000,000 33,700,000 33,100,000 39,300,000 35,500,000 31,300,000 31,600,000 30,900,000 28,500,000 26,900,000 29,500,000 31,100,000 29,300,000 28,000,000 28,600,000 33,100,000 32,300,000 30,200,000 32,100,000 41,200,000 34,500,000 31,800,000 32,500,000 40,100,000 34,600,000 36,100,000 35,600,000 39,400,000 33,600,000 37,000,000  42,000,000   51,800,000   
      deferred tax liability
                                                1,200,000 1,200,000 1,200,000 1,200,000 1,100,000                                     
      preferred stock, 5,000,000 shares authorized at both september 30, 2014 and december 31, 2013; no shares were issued and outstanding at september 30, 2014 and december 31, 2013
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at june 30, 2014 and december 31, 2013
                                                 123,100,000                                        
      short-term capital lease
                                                 100,000 200,000  200,000 300,000 200,000                                   
      preferred stock, 5,000,000 shares authorized at both june 30, 2014 and december 31, 2013; no shares were issued and outstanding at june 30, 2014 and december 31, 2013
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at march 31, 2014 and december 31, 2013
                                                  123,500,000                                       
      preferred stock, 5,000,000 shares authorized at both march 31, 2014 and december 31, 2013; no shares were issued and outstanding at march 31, 2014 and december 31, 2013
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at december 31, 2013 and december 31, 2012
                                                   119,800,000                                      
      property, plant, and equipment — net
                                                   429,300,000    384,300,000    367,800,000   358,100,000 354,100,000 356,900,000 349,100,000 350,300,000 338,900,000 332,000,000 323,600,000 310,700,000 296,700,000 272,800,000 253,300,000 232,900,000 222,700,000 205,900,000 193,600,000 179,500,000 170,300,000 148,400,000 242,700,000 233,800,000 223,400,000 218,500,000 213,000,000 213,400,000 214,600,000 217,700,000 
      net asset in respect of vebas
                                                   406,000,000         267,800,000 265,600,000 208,600,000                           
      payable to affiliate
                                                      12,300,000 7,900,000 14,000,000 18,300,000 22,400,000 14,400,000 20,400,000 25,100,000 23,900,000 17,100,000 20,000,000 18,600,000 16,700,000 9,000,000 21,500,000 21,100,000 21,500,000 27,500,000 10,600,000 11,300,000 17,300,000 18,600,000 19,800,000 19,200,000 19,300,000 16,200,000 19,500,000 33,000,000  14,800,000   12,600,000   
      net liability in respect of veba
                                                    4,000,000 4,500,000 4,900,000 5,300,000 19,900,000 20,100,000 20,400,000 20,600,000     1,200,000 900,000 600,000 300,000 16,900,000 15,900,000 14,900,000 14,000,000                  
      commitments and contingencies — note 10
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2013 and december 31, 2012; no shares were issued and outstanding at december 31, 2013 and december 31, 2012
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at september 30, 2013 and december 31, 2012
                                                    122,100,000                                     
      net asset in respect of veba
                                                    385,700,000 379,100,000 372,500,000 365,900,000 266,900,000 262,300,000 213,400,000 144,700,000    195,700,000 179,600,000 172,300,000 145,100,000 127,500,000 55,200,000 55,500,000 55,900,000 56,200,000                  
      preferred stock, 5,000,000 shares authorized at both september 30, 2013 and december 31, 2012; no shares were issued and outstanding at september 30, 2013 and december 31, 2012
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at june 30, 2013 and december 31, 2012
                                                     122,700,000                                    
      preferred stock, 5,000,000 shares authorized at both june 30, 2013 and december 31, 2012; no shares were issued and outstanding at june 30, 2013 and december 31, 2012
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at march 31, 2013 and december 31, 2012
                                                      141,800,000                                   
      preferred stock, 5,000,000 shares authorized at both march 31, 2013 and december 31, 2012; no shares were issued and outstanding at march 31, 2013 and december 31, 2012
                                                                                         
      trade, less allowance for doubtful receivables of 0.8 at december 31, 2012 and 0.9 at december 31, 2011, respectively
                                                       123,800,000                                  
      long-term debt-current portion
                                                          1,700,000 1,300,000    1,300,000 1,300,000                         
      commitments and contingencies — note 11
                                                                                         
      preferred stock, 5,000,000 shares authorized at both december 31, 2012 and december 31, 2011; no shares were issued and outstanding at december 31, 2012 and december 31, 2011
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, none at december 31, 2012 and 2,202,495 shares at december 31, 2011
                                                                                         
      trade, less allowance for doubtful receivables of 0.7 at september 30, 2012 and 0.9 december 31, 2011
                                                        156,400,000                                 
      preferred stock, 5,000,000 shares authorized at both september 30, 2012 and december 31, 2011; no shares were issued and outstanding at september 30, 2012 and december 31, 2011
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, none at september 30, 2012 and 2,202,495 shares at december 31, 2011
                                                                                         
      trade, less allowance for doubtful receivables of 0.9 at june 30, 2012 and december 31, 2011
                                                         131,300,000                                
      preferred stock, 5,000,000 shares authorized at both june 30, 2012 and december 31, 2011; no shares were issued and outstanding at june 30, 2012 and december 31, 2011
                                                                                         
      additional capital
                                                         1,015,500,000 1,007,900,000 998,400,000 999,100,000 997,900,000 988,800,000 987,100,000 986,600,000 985,400,000 983,700,000 967,800,000 967,000,000 964,900,000 961,300,000 958,600,000 957,100,000 953,200,000 950,200,000 948,900,000 565,600,000 547,400,000 524,900,000 487,500,000 482,500,000 538,000,000 538,000,000 538,000,000 538,000,000 538,000,000 538,000,000 538,000,000 538,700,000 
      common stock owned by union veba subject to transfer restrictions, at reorganization value, none at june 30, 2012 and 2,202,495 shares at december 31, 2011
                                                                                         
      trade, less allowance for doubtful receivables of 0.9 at march 31, 2012 and december 31, 2011
                                                          130,100,000                               
      cash convertible senior notes
                                                          149,800,000 148,000,000 146,300,000 144,600,000 143,000,000 141,400,000 139,900,000 138,400,000 136,900,000                       
      other long-term debt
                                                          3,000,000 3,400,000    11,800,000 12,100,000 7,100,000 7,100,000                       
      preferred stock, 5,000,000 shares authorized at both march 31, 2012 and december 31, 2011; no shares were issued and outstanding at march 31, 2012 and december 31, 2011
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 881,010 shares at march 31, 2012 and 2,202,495 shares at december 31, 2011
                                                          -21,100,000                               
      trade, less allowance for doubtful receivables of 0.9 at december 31, 2011 and 0.6 at december 31, 2010, respectively
                                                           98,900,000                              
      preferred stock, 5,000,000 shares authorized at both december 31, 2011 and december 31, 2010; no shares were issued and outstanding at december 31, 2011 and december 31, 2010
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 2,202,495 shares at december 31, 2011 and 3,523,980 shares at december 31, 2010
                                                           -52,900,000                              
      trade, less allowance for doubtful receivables of 0.7 at september 30, 2011 and 0.6 at december 31, 2010
                                                            129,100,000                             
      current portion of secured debt and credit facilities
                                                            1,300,000 4,800,000 4,800,000                           
      long-term secured debt and credit facilities
                                                            3,700,000 7,600,000 7,900,000                           
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 2,202,495 shares at september 30, 2011 and 3,523,980 shares at december 31, 2010
                                                            -52,900,000                             
      trade, less allowance for doubtful receivables of 0.6 at june 30, 2011 and december 31, 2010
                                                             119,100,000                            
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 2,202,495 shares at june 30, 2011 and 3,523,980 shares at december 31, 2010
                                                             -52,900,000                            
      trade, less allowance for doubtful receivables of 0.6 at march 31, 2011 and 0.6 at december 31, 2010
                                                              114,000,000                           
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 3,306,938 shares at march 31, 2011 and 3,523,980 shares at december 31, 2010
                                                              -79,400,000                           
      trade, less allowance for doubtful receivables of 0.6 at december 31, 2010 and 0.8 at december 31, 2009, respectively
                                                               83,000,000                          
      due from affiliate
                                                                   200,000    11,800,000    9,500,000    1,300,000          
      commitments and contingencies — note 13
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 3,523,980 shares at december 31, 2010 and 4,845,465 shares at december 31, 2009
                                                               -84,600,000                          
      trade, less allowance for doubtful receivables of 0.6 at september 30, 2010 and 0.8 at december 31, 2009, respectively
                                                                90,200,000                         
      commitments and contingencies — note 14
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 3,523,980 at september 30, 2010 and 4,845,465 shares at december 31, 2009
                                                                -84,600,000                         
      trade, less allowance for doubtful receivables of 0.6 at june 30, 2010 and 0.8 at december 31, 2009, respectively
                                                                 90,900,000                        
      current assets — held for sale
                                                                 2,600,000                        
      other assets — held for sale
                                                                 3,100,000                        
      current liabilities — held for sale
                                                                 900,000                        
      commitments and contingencies — note 12
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 3,708,922 at june 30, 2010 and 4,845,465 shares at december 31, 2009
                                                                 -89,100,000                        
      trade, less allowance for doubtful receivables of .6 and .8 at march 31, 2010 and december 31, 2009, respectively
                                                                  96,000,000                       
      commitments and contingencies
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,392,265 shares at march 31, 2010 and 4,845,465 shares at december 31, 2009
                                                                  -105,500,000                       
      trade, less allowance for doubtful receivables of .8 at both december 31, 2009 and 2008
                                                                   83,700,000                      
      revolving credit facility and other long-term debt
                                                                   7,100,000 7,100,000 7,100,000 7,000,000 43,000,000                  
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both december 31, 2009 and december 31, 2008
                                                                   -116,400,000                      
      trade, less allowance for doubtful receivables of .8 at september 30, 2009 and at december 31, 2008
                                                                    81,100,000                     
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both september 30, 2009 and december 31, 2008
                                                                    -116,400,000                     
      trade, less allowance for doubtful receivables of .8 at june 30, 2009 and december 31, 2008
                                                                     74,200,000                    
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both june 30, 2009 and december 31, 2008
                                                                     -116,400,000                    
      trade, less allowance for doubtful receivables of .8 at march 31, 2009 and december 31, 2008
                                                                      70,700,000                   
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both march 31, 2009 and december 31, 2008
                                                                      -116,400,000                   
      trade, less allowance for doubtful receivables of .8 and 1.4
                                                                       98,500,000                  
      investments in and advances to unconsolidated affiliate
                                                                        37,600,000 44,500,000 44,200,000 41,300,000    18,600,000 13,300,000 22,700,000 15,500,000 12,600,000 16,200,000 14,600,000 15,700,000 16,700,000  
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both december 31, 2008 and december 31, 2007
                                                                       -116,400,000                  
      trade, less allowance for doubtful receivables of 0.9 and 1.4 at september 30, 2008 and december 31, 2007, respectively
                                                                        115,400,000                 
      net assets in respect of vebas
                                                                        135,000,000 134,800,000 134,700,000 134,900,000 90,300,000 89,600,000 89,000,000 40,700,000 32,900,000         
      borrowings under revolving credit facility
                                                                        34,700,000                 
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both september 30, 2008 and december 31, 2007
                                                                        -116,400,000                 
      trade, less allowance for doubtful receivables of 1.0 and 1.4 at june 30, 2008 and december 31, 2007, respectively
                                                                         114,400,000                
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both june 30, 2008 and december 31, 2007
                                                                         -116,400,000                
      trade, less allowance for doubtful receivables of 1.2 and 1.4 at march 31, 2008 and december 31, 2007, respectively
                                                                          121,200,000               
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at both march 31, 2008 and december 31, 2007
                                                                          -116,400,000               
      trade, less allowance for doubtful receivables of 1.4 and 2.0
                                                                           96,500,000              
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 4,845,465 shares at december 31, 2007 and 6,291,945 shares at december 31, 2006
                                                                           -116,400,000              
      trade, less allowance for doubtful receivables of 2.0 at both september 30, 2007 and december 31, 2006
                                                                            112,100,000             
      investment in and advances to unconsolidated affiliate
                                                                            43,900,000 38,600,000 26,100,000           
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 5,472,665 shares and 6,291,945 shares at september 30, 2007 and december 31, 2006, respectively
                                                                            -131,400,000             
      trade, less allowance for doubtful receivables of 2.0 at both periods
                                                                             116,700,000 115,700,000           
      accrued interest
                                                                             600,000 600,000 700,000 100,000 1,100,000  1,000,000   800,000   
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 5,472,665 shares and 6,291,945 shares at june 30, 2007 and december 31, 2006, respectively
                                                                             -131,400,000            
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 5,472,665 shares and 6,291,945 shares at march 31, 2007 and december 31 2006, respectively
                                                                              -131,400,000           
      trade, less allowance for doubtful receivables of 2.0 and 2.9
                                                                               98,400,000 109,300,000         
      personal injury-related insurance recoveries receivable
                                                                                 963,300,000 963,700,000 965,500,000 965,500,000 966,100,000 967,000,000 967,000,000  
      intangible assets- net, including goodwill of 11.4 at december 31, 2005
                                                                                         
      liabilities not subject to compromise —
                                                                                         
      long-term debt — current portion
                                                                                 1,100,000  1,100,000   1,200,000   
      discontinued operations’ current liabilities
                                                                                 1,500,000  2,100,000   53,100,000   
      discontinued operations’ liabilities
                                                                                 73,500,000 68,500,000 68,500,000 26,400,000     
      liabilities subject to compromise
                                                                                 4,388,000,000 4,392,200,000 4,400,100,000 3,949,800,000 3,950,400,000 3,952,900,000 3,954,900,000 2,856,000,000 
      minority interests
                                                                                 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 
      stockholders’ equity
                                                                                         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 6,291,945 shares at december 31, 2006
                                                                               -151,100,000          
      intangible assets including goodwill of 11.4 at december 31, 2005
                                                                                9,600,000         
      common stock owned by union veba subject to transfer restrictions, at reorganization value, 6,291,945 shares at september 30, 2006
                                                                                -151,100,000         
      trade, less allowance for doubtful receivables of 2.9 at both periods
                                                                                 114,100,000        
      accumulated deficit
                                                                                 -3,635,300,000 -3,632,800,000 -3,671,200,000 -2,535,600,000 -2,547,500,000 -2,909,200,000 -2,917,500,000 -2,280,000,000 
      trade, less allowance for doubtful receivables of 2.9 and 6.9
                                                                                   94,600,000      
      discontinued operations’ current assets
                                                                                    400,000 500,000 40,300,000 30,600,000 96,000,000 
      restricted proceeds from sale of commodity interests
                                                                                    680,600,000 675,000,000 281,300,000 280,800,000 302,600,000 
      discontinued operations’ long-term assets
                                                                                      42,900,000 38,900,000 49,700,000 
      discontinued operations’ long-term liabilities
                                                                                     26,400,000 26,400,000   
      commitments and contingencies stockholders’ equity
                                                                                         
      trade, less allowance for doubtful receivables of 6.5 and 6.9
                                                                                      103,000,000   
      investments in and advances to unconsolidated affiliates
                                                                                        55,500,000 
      liabilities & stockholders’ equity
                                                                                         
      discontinued operations’ long-term liabilities, including minority interests of 13.9 and 121.1
                                                                                        54,200,000 
    The information provided in this report is taken from www.sec.gov and many other data providers. While we have conducted our best efforts to ensure that the parsed data is accurate, we cannot guarantee its accuracy. Please use caution and understand that any consequences of its use are your own responsibility.