7Baggers

Willis Towers Watson PLC
(NASDAQ:WTW) 

WTW stock logo

Willis Towers Watson Public Limited Company operates as an advisory, broking, and solutions company worldwide. It operates through two segments: Health, Wealth and Career; and Risk & Broking. The company offers strategy and design consulting, plan management service and support, broking and administ...

Founded: 1828
Sector: Consumer Cyclical
Industry: Personal Services

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At a glance:
  • Global Leader in Insurance Brokerage and Risk Advisory: Willis Towers Watson (WTW) operates a diversified platform spanning insurance broking, risk management consulting, and related advisory services for corporate and institutional clients.
  • Revenue Mix Benefits from Recurring, Fee-Based Client Relationships: A meaningful portion of WTW’s business is tied to ongoing brokerage placements and advisory engagements, which can support relatively stable demand versus more transaction-driven financial services models.
  • Earnings Sensitivity to Pricing Cycles and Commercial Insurance Markets: Results can be influenced by insurance market conditions (pricing, capacity, and renewal activity), with stronger rate environments generally supporting brokerage economics and organic growth.
  • Margin and Cost Discipline Remain Key Performance Levers: Operating margin expansion often depends on expense management, productivity initiatives, and integration of prior restructuring actions, alongside sustained organic growth.
  • Capital Allocation Focus: Shareholder Returns and Targeted M&A: WTW historically balances returning capital to shareholders (e.g., buybacks/dividends) with selective acquisitions and investments intended to deepen capabilities or expand distribution in attractive niches.
Bull Thesis:
  • Resilient Demand for Core Consulting Services: Willis Towers Watson operates in essential areas like HR, benefits, and risk management consulting. These services are often non-discretionary for businesses, driven by regulatory complexity, talent management needs, and evolving risk landscapes, ensuring stable and growing demand regardless of broader economic cycles.
  • Strategic Focus and Capital Allocation Post-Divestiture: Following the divestiture of its insurance brokerage business (Willis Re), WTW has a clearer strategic focus on its core consulting and solutions segments. This allows for more targeted investments, operational efficiencies, and significant capital returns to shareholders through buybacks, enhancing shareholder value.
  • Global Reach and Diversified Revenue Streams: WTW's extensive global footprint and diverse client base across various industries and geographies provide revenue stability and resilience. This diversification mitigates risks associated with reliance on any single market or sector, supporting consistent performance and growth.
  • Recurring Revenue Model and High Client Retention: Many of WTW's services involve long-term client relationships, recurring consulting engagements, and software subscriptions. This model provides a stable and predictable revenue base, supported by high client retention rates due to the embedded nature of its services within client operations.
Bear Thesis:
  • Intense Competition and Pricing Pressure: The HR, benefits, and risk consulting market is highly competitive, with major players like Mercer (Marsh McLennan), Aon, and numerous specialized firms vying for market share. This intense competition can lead to pricing pressure, impacting WTW's margins and making it challenging to achieve significant organic growth.
  • Sensitivity to Economic Downturns: While some services are essential, a significant economic downturn could lead clients to reduce discretionary consulting spend, delay projects, or scale back on benefits programs. This could negatively impact WTW's revenue growth and profitability, particularly in its advisory and project-based segments.
  • Talent Acquisition and Retention Challenges: As a professional services firm, WTW's success is heavily reliant on its human capital. Attracting, developing, and retaining top-tier consulting talent in a competitive labor market is a continuous challenge. Wage inflation and the 'great resignation' trends could increase operating costs and impact service delivery.
  • Execution Risks and Integration Complexity: Despite past strategic realignments and divestitures, managing a large, global professional services organization involves ongoing execution risks. Integrating various service lines, technologies, and cultures across different regions can be complex, potentially leading to operational inefficiencies or slower-than-expected realization of synergies.
Main Competitors:
  • Marsh McLennan ($MMC) (Risk, Strategy, and People Solutions (Marsh, Mercer, Guy Carpenter, Oliver Wyman)), Marsh McLennan is a major global competitor through its distinct operating companies: Marsh (insurance broking), Mercer (HR, health, wealth, career consulting), and Guy Carpenter (reinsurance broking). This structure directly mirrors and competes with Willis Towers Watson's integrated offerings across risk, benefits, and human capital.
  • Arthur J. Gallagher & Co. ($AJG) (Insurance Brokerage, Risk Management, and Consulting), Gallagher is a significant global insurance broker and risk management firm that also offers employee benefits consulting. While perhaps not as large as Aon or Marsh McLennan in all segments, it competes directly for clients seeking property & casualty insurance, employee benefits, and specialized risk advisory services, often through an aggressive acquisition strategy.
  • Korn Ferry ($KFY) (Organizational Consulting, Executive Search, Leadership Development), Korn Ferry competes with Willis Towers Watson primarily in the human capital and talent management space. They offer services like executive search, leadership development, organizational strategy, and rewards consulting, directly challenging WTW's offerings in talent acquisition, retention, and HR advisory.
Moat:
Willis Towers Watson's competitive moat is built on its global scale, deep domain expertise across risk, benefits, and human capital, and its integrated advisory and broking model. This allows for comprehensive solutions and creates high switching costs for large corporate clients. Competition is fierce, primarily from other global professional services giants like Aon and Marsh McLennan, who offer similar breadth and depth of services. Additionally, specialized consulting firms and regional brokers compete in specific segments, pushing WTW to continuously innovate and leverage its data and analytics capabilities to maintain its market position.
Income Statements:
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 2019-03-31 2018-12-31 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2016-09-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2014-06-30 2014-03-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 
                                                      
      revenue
    2,412,000,000 2,936,000,000 2,288,000,000 2,261,000,000 2,223,000,000 3,035,000,000 2,289,000,000 2,265,000,000 2,341,000,000 2,914,000,000 2,166,000,000 2,159,000,000 2,244,000,000 2,722,000,000 1,953,000,000 2,031,000,000 2,160,000,000 2,706,000,000 1,973,000,000 2,286,000,000 2,590,000,000 2,764,000,000 2,009,000,000 2,113,000,000 2,466,000,000 2,690,000,000 1,989,000,000 2,312,000,000  1,990,000,000 2,292,000,000                    
      yoy
    8.50% -3.26% -0.04% -0.18% -5.04% 4.15% 5.68% 4.91% 4.32% 7.05% 10.91% 6.30% 3.89% 0.59% -1.01% -11.15% -16.60% -2.10% -1.79% 8.19% 5.03% 2.75% 1.01% -8.61%  35.18% -13.22%                        
      qoq
    -17.85% 28.32% 1.19% 1.71% -26.75% 32.59% 1.06% -3.25% -19.66% 34.53% 0.32% -3.79% -17.56% 39.38% -3.84% -5.97% -20.18% 37.15% -13.69% -11.74% -6.30% 37.58% -4.92% -14.31% -8.33% 35.24% -13.97%   -13.18%                     
      costs of providing services
                                                      
      salaries and benefits
    1,434,000,000 1,439,000,000 1,413,000,000 1,449,000,000 1,324,000,000 1,367,000,000 1,396,000,000 1,397,000,000 1,342,000,000 1,325,000,000 1,359,000,000 1,347,000,000 1,313,000,000 1,263,000,000 1,225,000,000 1,259,000,000 1,318,000,000 1,262,000,000 1,255,000,000 1,407,000,000 1,523,000,000 1,419,000,000 1,331,000,000 1,363,000,000 1,394,000,000 1,340,000,000 1,283,000,000 1,348,000,000  1,275,000,000 1,377,000,000 1,261,000,000 1,145,000,000 1,148,000,000 1,119,000,000 1,196,000,000 -608,000,000 -570,000,000 -561,000,000 -575,000,000 -570,000,000 -541,000,000 -529,000,000 -568,000,000 -967,000,000 -502,000,000 -506,000,000 -490,000,000 -506,000,000 -584,000,000 
      other operating expenses
    385,000,000 355,000,000 352,000,000 336,000,000 365,000,000 518,000,000 419,000,000 439,000,000 457,000,000 533,000,000 396,000,000 433,000,000 453,000,000 513,000,000 384,000,000 393,000,000 486,000,000 504,000,000 385,000,000 398,000,000 417,000,000 505,000,000 382,000,000 387,000,000 484,000,000 472,000,000 417,000,000 418,000,000  406,000,000 423,000,000 376,000,000 366,000,000 391,000,000 370,000,000 431,000,000 -283,000,000 -177,000,000 -179,000,000 -173,000,000 -165,000,000 -144,000,000 -155,000,000 -156,000,000 -150,000,000 -146,000,000 -156,000,000 -147,000,000 -164,000,000 -153,000,000 
      depreciation
    56,000,000 59,000,000 56,000,000 57,000,000 54,000,000 54,000,000 60,000,000 57,000,000 59,000,000 58,000,000 60,000,000 64,000,000 60,000,000 64,000,000 60,000,000 65,000,000 66,000,000 69,000,000 69,000,000 72,000,000 71,000,000 70,000,000 73,000,000 67,000,000 98,000,000 69,000,000 58,000,000 54,000,000  51,000,000 49,000,000 52,000,000 54,000,000 51,000,000 45,000,000 43,000,000               
      amortization
    48,000,000 48,000,000 47,000,000 49,000,000 48,000,000 50,000,000 56,000,000 60,000,000 60,000,000 60,000,000 62,000,000 70,000,000 71,000,000 73,000,000 71,000,000 83,000,000 85,000,000 84,000,000 85,000,000 98,000,000 103,000,000 114,000,000 108,000,000 119,000,000 121,000,000 121,000,000 118,000,000 127,000,000  140,000,000 141,000,000 140,000,000 141,000,000 149,000,000 157,000,000 161,000,000               
      transaction and integration expenses
    41,000,000                   51,000,000 24,000,000 45,000,000 42,000,000 14,000,000 9,000,000 1,000,000 6,000,000 6,000,000  55,000,000 43,000,000 92,000,000 74,000,000                  
      total costs of providing services
    1,964,000,000 1,920,000,000 1,870,000,000 1,893,000,000 1,791,000,000 2,134,000,000 3,055,000,000 2,053,000,000 2,061,000,000 2,135,000,000 2,007,000,000 2,017,000,000 1,959,000,000 2,014,000,000 1,799,000,000 1,894,000,000 1,981,000,000 2,016,000,000 842,000,000 2,026,000,000 2,138,000,000 2,177,000,000 1,936,000,000 1,950,000,000 2,106,000,000 2,003,000,000 1,882,000,000 1,953,000,000  1,927,000,000 2,033,000,000 1,968,000,000 1,811,000,000 1,829,000,000 1,776,000,000 1,908,000,000               
      income from operations
    448,000,000 1,016,000,000 418,000,000 368,000,000 432,000,000 901,000,000 -766,000,000 212,000,000 280,000,000 779,000,000 159,000,000 142,000,000 285,000,000 708,000,000 154,000,000 137,000,000 179,000,000 690,000,000 1,131,000,000 260,000,000 452,000,000 587,000,000 73,000,000 163,000,000 360,000,000 687,000,000 107,000,000 359,000,000  63,000,000 259,000,000 110,000,000 41,000,000 124,000,000 1,000,000 326,000,000               
      yoy
    3.70% 12.76% -154.57% 73.58% 54.29% 15.66% -581.76% 49.30% -1.75% 10.03% 3.25% 3.65% 59.22% 2.61% -86.38% -47.31% -60.40% 17.55% 1449.32% 59.51% 25.56% -14.56% -31.78% -54.60%  990.48% -58.69% 226.36%  -49.19% 25800.00% -66.26%                   
      qoq
    -55.91% 143.06% 13.59% -14.81% -52.05% -217.62% -461.32% -24.29% -64.06% 389.94% 11.97% -50.18% -59.75% 359.74% 12.41% -23.46% -74.06% -38.99% 335.00% -42.48% -23.00% 704.11% -55.21% -54.72% -47.60% 542.06% -70.19%   -75.68% 135.45% 168.29% -66.94% 12300.00% -99.69%                
      operating margin %
    18.57% 34.60% 18.27% 16.28% 19.43% 29.69% -33.46% 9.36% 11.96% 26.73% 7.34% 6.58% 12.70% 26.01% 7.89% 6.75% 8.29% 25.50% 57.32% 11.37% 17.45% 21.24% 3.63% 7.71% 14.60% 25.54% 5.38% 15.53% NaN% 3.17% 11.30% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% 
      interest expense
    -77,000,000 -66,000,000 -65,000,000 -64,000,000 -65,000,000 -66,000,000 -65,000,000 -68,000,000 -64,000,000 -63,000,000 -61,000,000 -57,000,000 -54,000,000 -54,000,000 -54,000,000 -51,000,000 -49,000,000 -50,000,000 -50,000,000 -52,000,000 -59,000,000 -60,000,000 -61,000,000 -62,000,000 -61,000,000 -62,000,000 -62,000,000 -54,000,000  -52,000,000 51,000,000 49,000,000 47,000,000 46,000,000 45,000,000 46,000,000 -39,000,000 -35,000,000 -35,000,000 -35,000,000 -32,000,000 -30,000,000 -32,000,000 -31,000,000 -31,000,000 -32,000,000 -32,000,000 -38,000,000 -34,000,000 -40,000,000 
      other income
    5,000,000 -3,000,000 37,000,000 9,000,000 -64,000,000 853,000,000 -1,163,000,000 24,000,000 26,000,000 23,000,000 66,000,000 35,000,000 25,000,000 83,000,000 85,000,000 93,000,000 27,000,000 84,000,000 105,000,000 74,000,000 439,000,000 75,000,000 156,000,000 76,000,000 92,000,000 50,000,000 55,000,000 55,000,000  63,000,000 -56,000,000 19,750,000 29,000,000   18,000,000 2,000,000 1,000,000 2,000,000 1,000,000 3,000,000  2,000,000 1,000,000  1,000,000 3,000,000  1,000,000  
      income from operations before income taxes and interest in earnings of associates
    376,000,000 947,000,000 390,000,000 313,000,000 303,000,000                             48,000,000                 
      provision for income taxes
    -70,000,000    -65,000,000   -26,000,000 -48,000,000 -116,000,000 -25,000,000 -24,000,000 -50,000,000 -131,000,000 -1,000,000 -19,000,000 -43,000,000 -150,000,000 -267,000,000 -96,000,000 -96,000,000 -49,750,000 -46,000,000 -75,000,000 -78,000,000   -67,000,000  -9,000,000 43,000,000                    
      income from operations before interest in earnings of associates
    306,000,000 750,000,000 313,000,000 334,000,000 238,000,000                             40,000,000                 
      interests in earnings of associates, net of tax
    -3,000,000   -2,000,000 1,000,000                                              
      net income
    303,000,000 736,000,000 306,000,000 332,000,000 239,000,000 1,248,000,000 -1,672,000,000 142,000,000 194,000,000 623,000,000 139,000,000 96,000,000 206,000,000 593,000,000 192,000,000 114,000,000 125,000,000 2,407,000,000 907,000,000 186,000,000 736,000,000 134,250,000 122,000,000 102,000,000 313,000,000 551,000,000 80,000,000 293,000,000  65,000,000 221,000,000   41,000,000  245,000,000 -18,000,000 116,000,000 72,000,000 48,000,000 250,000,000 -27,000,000 107,000,000 223,000,000 -801,000,000 26,000,000 232,000,000 60,000,000 89,000,000 42,000,000 
      yoy
    26.78% -41.03% -118.30% 133.80% 23.20% 100.32% -1302.88% 47.92% -5.83% 5.06% -27.60% -15.79% 64.80% -75.36% -78.83% -38.71% -83.02% 1692.92% 643.44% 82.35% 135.14% -75.64% 52.50% -65.19%  747.69% -63.80%   58.54%    -64.66%  410.42% -107.20% -529.63% -32.71% -78.48% -131.21% -203.85% -53.88% 271.67% -1000.00% -38.10%     
      qoq
    -58.83% 140.52% -7.83% 38.91% -80.85% -174.64% -1277.46% -26.80% -68.86% 348.20% 44.79% -53.40% -65.26% 208.85% 68.42% -8.80% -94.81% 165.38% 387.63% -74.73% 448.23% 10.04% 19.61% -67.41% -43.19% 588.75% -72.70%   -70.59%      -1461.11% -115.52% 61.11% 50.00% -80.80% -1025.93% -125.23% -52.02% -127.84% -3180.77% -88.79% 286.67% -32.58% 111.90%  
      net income margin %
    12.56% 25.07% 13.37% 14.68% 10.75% 41.12% -73.04% 6.27% 8.29% 21.38% 6.42% 4.45% 9.18% 21.79% 9.83% 5.61% 5.79% 88.95% 45.97% 8.14% 28.42% 4.86% 6.07% 4.83% 12.69% 20.48% 4.02% 12.67% NaN% 3.27% 9.64% NaN% NaN% Infinity% NaN% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 
      income attributable to non-controlling interests
    -6,000,000 -1,000,000 -2,000,000 -1,000,000 -4,000,000 -2,000,000 -3,000,000 -1,000,000 -4,000,000 -1,000,000 -3,000,000 -2,000,000 -3,000,000 -5,000,000 -2,000,000 -5,000,000 -3,000,000 -5,000,000 -4,000,000 -2,000,000 -3,000,000 -7,000,000 -1,000,000 -8,000,000 -8,000,000 -7,000,000 -5,000,000 -6,000,000  -7,000,000 -6,000,000 -8,000,000  -8,000,000  -7,000,000               
      net income attributable to wtw
    297,000,000 735,000,000 304,000,000 331,000,000 235,000,000 1,246,000,000 -1,675,000,000 141,000,000 190,000,000 622,000,000 136,000,000 94,000,000 203,000,000 588,000,000 190,000,000 109,000,000 122,000,000                                  
      earnings per share
                                                      
      basic earnings per share
    3.12 7.54 3.12 3.34 2.34 12.15 -16.44 1.37 1.84 5.93 1.3 0.88 1.89 5.29 1.72 0.97 1.03 18.84 7.01 1.42 5.64 1.003 0.93 0.73 2.36 4.19 0.58 2.21  0.44 1.62   0.24  1.76               
      diluted earnings per share
    3.1 7.52 3.11 3.32 2.33 12.15 -16.44 1.36 1.83 5.89 1.29 0.88 1.88 5.27 1.72 0.97 1.03 18.78 6.99 1.41 5.63 3.66 0.93 0.72 2.34 4.18 0.58 2.2  0.44 1.61   0.24  1.75               
      comprehensive income before non-controlling interests
    267 611 303 561 462 900 -1,561 126 145 387 61 124 259 691 -42 -130 69 2,580 826 219 786 127.75 260 158 93 438 -42 315  -111 305                    
      comprehensive income attributable to non-controlling interests
    -6 -1 -2 -1 -4 -2 -3 -1 -4 -1 -5 -2 -3 -4 -2 -5 -3 -5 -4 -2 -5 -4.25 -2 -8 -7 -8 -3 -5  -6 -7                    
      comprehensive income attributable to wtw
    261 610 301 560 458 898 -1,564 125 141 386 56 122 256 687 -44 -135 66                                  
      impairment
          1,042,000,000                                            
      restructuring costs
         32,000,000 8,000,000 3,000,000 18,000,000 38,000,000 17,000,000 10,000,000 3,000,000 28,000,000 9,000,000 56,000,000 6,000,000               47,000,000 31,000,000 27,000,000 49,000,000 25,000,000 -33,000,000 -24,000,000 -38,000,000 -3,000,000           
      transaction and transformation
     19,000,000 2,000,000 2,000,000  113,000,000 74,000,000 97,000,000 125,000,000 121,000,000 113,000,000 93,000,000 59,000,000 73,000,000 50,000,000 38,000,000 20,000,000                                  
      benefit from income taxes
     -30,250,000 -77,000,000 21,000,000  62,000,000 322,000,000                   -124,000,000 -20,000,000       8,000,000  18,000,000               
      interest in earnings of associates, net of tax
     -14,000,000 -7,000,000                             1,000,000  1,000,000 1,000,000 1,000,000 -6,000,000 3,000,000 -2,000,000  19,000,000 -1,000,000 -3,000,000 15,000,000 -7,000,000 -2,000,000 15,000,000 10,000,000 -3,000,000 16,000,000 
      income from operations before income taxes
         -396,000,000 -1,994,000,000 168,000,000 242,000,000           282,000,000 832,000,000 184,000,000 168,000,000 177,000,000 391,000,000 675,000,000 100,000,000 360,000,000  74,000,000 264,000,000                    
      income from continuing operations before income taxes
             739,000,000 164,000,000 120,000,000 256,000,000 737,000,000 185,000,000 179,000,000 157,000,000 724,000,000 1,186,000,000                                
      income from continuing operations
             623,000,000 139,000,000 96,000,000 206,000,000 606,000,000 184,000,000 160,000,000 114,000,000 574,000,000 919,000,000                       -27,000,000 107,000,000  -800,000,000 26,000,000 232,000,000    
      income from discontinued operations, net of tax
                 -13,000,000 8,000,000 -46,000,000 11,000,000 1,833,000,000 -12,000,000                          250,000      
      basic earnings per share:
                                                      
      income from continuing operations per share
             5.93 1.3 0.88 1.89 5.41 1.65 1.38 0.94 4.54 7.1                                
      income from discontinued operations per share
                 -0.12 0.07 -0.41 0.09 14.3 -0.09                                
      diluted earnings per share:
                                                      
      loss from discontinued operations, net of tax
                                                      
      loss from discontinued operations per share
                                                      
      transaction and integration
                     71,000,000 -952,000,000                                
      income from discontinued operations before income taxes
                     79,250,000 -15,000,000                                
      benefit from income taxes on discontinued operations
                     -17,500,000 3,000,000                                
      net income attributable to willis towers watson
                     455,000,000 903,000,000 184,000,000 733,000,000 476,000,000 121,000,000 94,000,000 305,000,000 544,000,000 75,000,000 287,000,000  58,000,000 215,000,000   33,000,000  238,000,000               
      x
                                                      
      comprehensive income attributable to willis towers watson
                     455 822 217 781 123.5 258 150 86 430 -45 310  -117 298                    
      cash dividends declared per share
                                 0.6 0.6 0.53 0.53 0.53 0.48 0.48           0.27 0.26 0.26 0.26 
      revenues
                                                      
      commissions and fees
                                   2,051,000,000 1,832,000,000 1,930,000,000 1,761,000,000  970,000,000 841,000,000 917,000,000 930,000,000 1,090,000,000 791,000,000 885,000,000 1,046,000,000 867,000,000 749,000,000 1,005,000,000 755,000,000 854,000,000 1,000,000,000 
      interest and other income
                                   27,000,000 20,000,000 23,000,000 16,000,000 15,000,000               
      total revenues
                                   2,078,000,000 1,852,000,000 1,953,000,000 1,777,000,000 2,234,000,000 974,000,000 846,000,000 922,000,000 935,000,000 1,097,000,000 795,000,000 890,000,000 1,051,000,000 871,000,000 754,000,000 1,013,000,000 762,000,000 863,000,000 1,008,000,000 
      (loss)/income from operations before income taxes and interest in earnings of associates
                                   102,500,000 -35,000,000                  
      benefit from/(benefit from) income taxes
                                   18,250,000 19,000,000                  
      (loss)/income from operations before interest in earnings of associates
                                   84,250,000 -54,000,000                  
      net (loss)/income
                                   84,750,000 -54,000,000  -31,000,000                
      net (loss)/income attributable to willis towers watson
                                   80,750,000 -54,000,000  -32,000,000                
      basic (loss)/earnings per share
                                   0.595 -0.4  -0.23                
      diluted (loss)/earnings per share
                                   0.59 -0.4  -0.23                
      comprehensive income/(loss) before non-controlling interests
                                   430 34 181                 
      comprehensive loss/(income) attributable to non-controlling interests
                                   -3.75 12                  
      comprehensive income/(loss) attributable to willis towers watson
                                   408 46 165                 
      integration expenses
                                     63,000,000 36,000,000 52,000,000               
      other income/(income)
                                     30,000,000 14,000,000                
      comprehensive (income)/loss attributable to non-controlling interests
                                     -16                 
      (loss)/income from continuing operations before income taxes and interest in earnings of associates
                                      -58,000,000                
      (benefit from)/benefit from income taxes
                                      -26,000,000                
      (loss)/income from continuing operations before interest in earnings of associates
                                      -32,000,000                
      (income)/loss attributable to non-controlling interests
                                      -1,000,000                
      commissions, fees and consulting revenue
                                       2,219,000,000               
      income from continuing operations before income taxes and interest in earnings of associates
                                       262,000,000               
      income from continuing operations before interest in earnings of associates
                                       244,000,000               
      investment income
                                        2,000,000 4,000,000 3,000,000 4,000,000 4,000,000 4,000,000 3,000,000 4,000,000 4,000,000 4,000,000 5,000,000 7,000,000 8,000,000 8,000,000 
      expenses
                                                      
      depreciation expense
                                        -25,000,000 -25,000,000 -23,000,000 -24,000,000 -23,000,000 -21,000,000 -21,000,000 -26,000,000 -20,000,000 -21,000,000 -19,000,000 -17,000,000 -19,000,000 -20,000,000 
      amortization of intangible assets
                                        -23,000,000 -23,000,000 -16,000,000 -12,000,000 -13,000,000 -14,000,000 -14,000,000 -14,000,000 -15,000,000 -14,000,000 -15,000,000 -18,000,000 -17,000,000 -17,000,000 
      total expenses
                                        -972,000,000 -819,000,000 -817,000,000 -787,000,000 -771,000,000 -720,000,000 -719,000,000 -764,000,000 -1,646,000,000 -684,000,000 -696,000,000 -672,000,000 -706,000,000 -770,000,000 
      operating income
                                        2,000,000 27,000,000 105,000,000 148,000,000 326,000,000 75,000,000 171,000,000 287,000,000 -775,000,000 70,000,000 317,000,000 90,000,000 157,000,000 238,000,000 
      income before income taxes and interest in earnings of associates
                                        -8,000,000 1,000,000 93,000,000 110,000,000 294,000,000 -15,000,000 139,000,000 256,000,000 117,250,000 38,000,000 285,000,000 52,000,000 123,000,000 27,000,000 
      income tax benefit
                                        -4,000,000 112,000,000             
      income before interest in earnings of associates
                                        -12,000,000 113,000,000 74,000,000 51,000,000 231,000,000 -26,000,000 110,000,000 208,000,000 88,750,000 28,000,000 217,000,000 50,000,000 92,000,000 26,000,000 
      less: net income (income) attributable to noncontrolling interests
                                        -1,250,000 1,000,000             
      net income attributable to willis group holdings
                                        99,250,000 117,000,000 70,000,000 47,000,000 246,000,000 -27,000,000 105,000,000 219,000,000 -805,000,000 26,000,000 225,000,000 60,000,000 85,000,000 34,000,000 
      income taxes
                                          -19,000,000 -59,000,000 -63,000,000 -11,000,000 -29,000,000 -48,000,000 13,000,000 -10,000,000 -68,000,000 -2,000,000 -31,000,000 -1,000,000 
      less: net income attributable to noncontrolling interests
                                          -2,000,000 -1,000,000 -4,000,000  -2,000,000 -4,000,000 -4,000,000  -7,000,000  -4,000,000 -8,000,000 
      interest in (losses) / earnings of associates, net of tax
                                           -3,000,000           
      net income on disposal of operations
                                                      
      loss on extinguishment of debt
                                             -60,000,000         
      discontinued operations, net of tax
                                                250,000      
      amounts attributable to willis group holdings shareholders
                                                      
      income from continuing operations, net of tax
                                             -27,000,000 105,000,000  -804,000,000 26,000,000 225,000,000    
      net gain on disposal of operations
                                                -2,000,000 -1,000,000    4,000,000 
      make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs
                                                     -171,000,000 
      total comprehensive income attributable to willis group holdings
                                                  256,000,000    
      earnings per share — basic and diluted
                                                      
      — basic earnings per share — continuing operations
                                                  1.29    
      — diluted earnings per share — continuing operations
                                                  1.28    
      — basic earnings per share
                                                   0.35   
      — diluted earnings per share
                                                   0.34   
      —basic earnings per share
                                                    0.49 0.2 
      —diluted earnings per share
                                                    0.48 0.2 
      earnings per share—basic and diluted
                                                      
    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 2019-03-31 2018-12-31 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2016-09-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2014-06-30 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-03-31 2011-09-30 2011-06-30 2011-03-31 
                                                       
        assets
                                                       
        cash and cash equivalents
      1,855,000,000 3,132,000,000 1,895,000,000 1,963,000,000 1,507,000,000 1,890,000,000 1,372,000,000 1,247,000,000 1,893,000,000 1,424,000,000 1,247,000,000 1,602,000,000 1,135,000,000 1,262,000,000 1,496,000,000 1,920,000,000 2,198,000,000 4,486,000,000 2,162,000,000 2,217,000,000 1,960,000,000 2,089,000,000 1,647,000,000 1,087,000,000 898,000,000 887,000,000 867,000,000 992,000,000 1,033,000,000 911,000,000 954,000,000 1,030,000,000 912,000,000 852,000,000 767,000,000 954,000,000 532,000,000 466,000,000 483,000,000 708,000,000 623,000,000 503,000,000 531,000,000 500,000,000 424,000,000 464,000,000 363,000,000 317,000,000 432,000,000 
        fiduciary assets
      10,981,000,000 10,445,000,000 9,967,000,000 10,720,000,000 10,293,000,000 9,504,000,000 9,176,000,000 9,925,000,000 9,940,000,000 9,073,000,000 8,039,000,000 8,608,000,000 12,213,000,000 11,772,000,000 11,190,000,000 11,988,000,000 11,631,000,000 11,014,000,000 10,923,000,000 15,379,000,000 15,911,000,000 15,160,000,000 15,560,000,000 16,042,000,000 15,589,000,000 13,004,000,000 13,779,000,000 15,129,000,000 12,604,000,000 14,126,000,000 13,613,000,000 12,155,000,000 12,206,000,000 12,751,000,000 11,604,000,000 12,031,000,000 10,458,000,000 10,509,000,000 11,006,000,000 9,983,000,000 9,197,000,000 9,910,000,000 9,811,000,000 9,271,000,000 10,425,000,000 10,368,000,000 10,090,000,000 11,256,000,000 10,484,000,000 
        accounts receivable
      2,648,000,000 2,702,000,000 2,189,000,000 2,364,000,000 2,366,000,000 2,494,000,000 2,118,000,000 2,425,000,000 2,430,000,000 2,572,000,000 2,079,000,000 2,206,000,000 2,261,000,000 2,387,000,000 1,884,000,000 2,025,000,000 2,186,000,000 2,370,000,000 2,065,000,000 2,507,000,000 2,569,000,000 2,555,000,000 2,223,000,000 2,430,000,000 2,594,000,000 2,621,000,000 2,167,000,000 2,490,000,000 2,379,000,000 2,394,000,000 2,600,000,000 2,246,000,000 2,155,000,000 2,288,000,000 2,043,000,000 2,268,000,000 1,258,000,000 1,100,000,000 1,226,000,000 1,175,000,000 985,000,000 1,044,000,000 1,051,000,000 933,000,000 908,000,000 1,009,000,000 911,000,000 1,049,000,000 992,000,000 
        prepaid and other current assets
      601,000,000 595,000,000 570,000,000 558,000,000 1,295,000,000 1,217,000,000 558,000,000 432,000,000 379,000,000 364,000,000 469,000,000 401,000,000 337,000,000 414,000,000 476,000,000 432,000,000 390,000,000 612,000,000 480,000,000 465,000,000 432,000,000 497,000,000 484,000,000 363,000,000 469,000,000 525,000,000 587,000,000 409,000,000 404,000,000 458,000,000 439,000,000 430,000,000 418,000,000 342,000,000 319,000,000 326,000,000              
        total current assets
      16,085,000,000 16,874,000,000 14,621,000,000 15,605,000,000 15,461,000,000 15,105,000,000 14,313,000,000 14,029,000,000 14,642,000,000 13,433,000,000 11,834,000,000 12,817,000,000 15,946,000,000 15,835,000,000 15,051,000,000 16,370,000,000 16,412,000,000 18,488,000,000 20,591,000,000 20,568,000,000 20,872,000,000 20,301,000,000 19,914,000,000 19,922,000,000 19,550,000,000 17,037,000,000 17,400,000,000 19,020,000,000 16,420,000,000 17,889,000,000 17,606,000,000 15,861,000,000 15,691,000,000 16,233,000,000 14,733,000,000 15,579,000,000 12,503,000,000 12,334,000,000 12,946,000,000 12,072,000,000 11,014,000,000 11,674,000,000 11,595,000,000 10,898,000,000 12,116,000,000 12,217,000,000 11,700,000,000 12,981,000,000 12,304,000,000 
        fixed assets
      671,000,000 695,000,000 686,000,000 696,000,000 667,000,000 661,000,000 710,000,000 709,000,000 703,000,000 720,000,000 710,000,000 725,000,000 723,000,000 718,000,000 701,000,000 744,000,000 817,000,000 851,000,000 881,000,000 927,000,000 951,000,000 1,014,000,000 997,000,000 989,000,000 974,000,000 1,046,000,000 963,000,000 957,000,000 942,000,000 924,000,000 926,000,000 985,000,000 937,000,000 895,000,000 811,000,000 790,000,000 563,000,000 531,000,000 516,000,000 496,000,000 472,000,000 452,000,000 447,000,000 468,000,000 446,000,000 426,000,000 387,000,000 391,000,000 386,000,000 
        goodwill
      9,662,000,000 8,938,000,000 8,936,000,000 8,938,000,000 8,841,000,000 8,799,000,000 8,882,000,000 10,184,000,000 10,186,000,000 10,195,000,000 10,143,000,000 10,202,000,000 10,193,000,000 10,173,000,000 10,089,000,000 10,158,000,000 10,200,000,000 10,183,000,000 10,146,000,000 10,995,000,000 10,986,000,000 11,204,000,000 11,131,000,000 11,196,000,000 11,162,000,000 11,194,000,000 11,187,000,000 10,456,000,000 10,465,000,000 10,468,000,000 10,555,000,000 10,519,000,000 10,529,000,000 10,509,000,000 10,483,000,000 10,477,000,000 3,737,000,000 3,150,000,000 3,097,000,000 2,870,000,000 2,846,000,000 2,829,000,000 2,813,000,000 2,827,000,000 3,304,000,000 3,308,000,000 3,297,000,000 3,317,000,000 3,312,000,000 
        other intangible assets
      1,275,000,000 1,141,000,000 1,185,000,000 1,232,000,000 1,255,000,000 1,295,000,000 1,360,000,000 1,898,000,000 1,960,000,000 2,016,000,000 2,064,000,000 2,146,000,000 2,212,000,000 2,273,000,000 2,314,000,000 2,408,000,000 2,492,000,000 2,555,000,000 2,681,000,000 2,786,000,000 2,878,000,000 3,043,000,000 3,125,000,000 3,257,000,000 3,360,000,000 3,478,000,000 3,561,000,000 3,187,000,000 3,318,000,000 3,562,000,000 3,761,000,000 3,882,000,000 4,034,000,000 4,156,000,000 4,589,000,000 5,086,000,000 1,115,000,000 665,000,000 675,000,000 360,000,000 361,000,000 373,000,000 369,000,000 385,000,000 379,000,000 406,000,000 440,000,000 461,000,000 477,000,000 
        right-of-use assets
      499,000,000 487,000,000 480,000,000 495,000,000 487,000,000 485,000,000 539,000,000 536,000,000 542,000,000 565,000,000 533,000,000 570,000,000 577,000,000 586,000,000 584,000,000 621,000,000 701,000,000 720,000,000 795,000,000 830,000,000 841,000,000 902,000,000 894,000,000 894,000,000 906,000,000 968,000,000 959,000,000 946,000,000                      
        pension benefits assets
      541,000,000 529,000,000 589,000,000 578,000,000 550,000,000 530,000,000 632,000,000 611,000,000 598,000,000 588,000,000 908,000,000 893,000,000 863,000,000 827,000,000 1,008,000,000 1,002,000,000 992,000,000 971,000,000 1,056,000,000 1,026,000,000 991,000,000 971,000,000 1,041,000,000 975,000,000 915,000,000 868,000,000 932,000,000 833,000,000 773,000,000 902,000,000 832,000,000 764,000,000 649,000,000 595,000,000 857,000,000 749,000,000              
        other non-current assets
      904,000,000 866,000,000 942,000,000 934,000,000 803,000,000 806,000,000 732,000,000 1,655,000,000 1,606,000,000 1,573,000,000 1,431,000,000 1,420,000,000 1,392,000,000 1,357,000,000 1,244,000,000 1,206,000,000 1,227,000,000 1,202,000,000 1,132,000,000 1,135,000,000 1,113,000,000 1,096,000,000 935,000,000 877,000,000 860,000,000 835,000,000 701,000,000 494,000,000 467,000,000 468,000,000 532,000,000 447,000,000 432,000,000 386,000,000 328,000,000 348,000,000 209,000,000 211,000,000 234,000,000 194,000,000 187,000,000 205,000,000 199,000,000 206,000,000 328,000,000 353,000,000 339,000,000 365,000,000 357,000,000 
        total non-current assets
      13,552,000,000 12,656,000,000 12,818,000,000 12,873,000,000 12,603,000,000 12,576,000,000 12,855,000,000 15,593,000,000 15,595,000,000 15,657,000,000 15,789,000,000 15,956,000,000 15,960,000,000 15,934,000,000 15,940,000,000 16,139,000,000 16,429,000,000 16,482,000,000 16,691,000,000 17,699,000,000 17,760,000,000 18,230,000,000 18,123,000,000 18,188,000,000 18,177,000,000 18,389,000,000 18,303,000,000 16,873,000,000 15,965,000,000 16,324,000,000 16,606,000,000 16,597,000,000 16,581,000,000 16,541,000,000 17,068,000,000 17,450,000,000 6,336,000,000 5,479,000,000 5,373,000,000 4,479,000,000 4,309,000,000 4,264,000,000 4,207,000,000 4,214,000,000 4,887,000,000 4,874,000,000 4,915,000,000 4,960,000,000 4,934,000,000 
        total assets
      29,637,000,000 29,530,000,000 27,439,000,000 28,478,000,000 28,064,000,000 27,681,000,000 27,168,000,000 29,622,000,000 30,237,000,000 29,090,000,000 27,623,000,000 28,773,000,000 31,906,000,000 31,769,000,000 30,991,000,000 32,509,000,000 32,841,000,000 34,970,000,000 37,282,000,000 38,267,000,000 38,632,000,000 38,531,000,000 38,037,000,000 38,110,000,000 37,727,000,000 35,426,000,000 35,703,000,000 35,893,000,000 32,385,000,000 34,213,000,000 34,212,000,000 32,458,000,000 32,272,000,000 32,774,000,000 31,801,000,000 33,029,000,000 18,839,000,000 17,813,000,000 18,319,000,000 16,551,000,000 15,323,000,000 15,938,000,000 15,802,000,000 15,112,000,000 17,003,000,000 17,091,000,000 16,615,000,000 17,941,000,000 17,238,000,000 
        liabilities and equity
                                                       
        fiduciary liabilities
      10,981,000,000 10,445,000,000 9,967,000,000 10,720,000,000 10,293,000,000 9,504,000,000 9,176,000,000 9,925,000,000 9,940,000,000 9,073,000,000 8,039,000,000 8,608,000,000 12,213,000,000 11,772,000,000 11,190,000,000 11,988,000,000 11,631,000,000 11,014,000,000 10,923,000,000 15,379,000,000 15,911,000,000 15,160,000,000 15,560,000,000 16,042,000,000 15,589,000,000 13,004,000,000 13,779,000,000 15,129,000,000 12,604,000,000 14,126,000,000 13,613,000,000 12,155,000,000 12,206,000,000 12,751,000,000 11,604,000,000 12,031,000,000 10,458,000,000 10,509,000,000 11,006,000,000 9,983,000,000 9,197,000,000 9,910,000,000 9,811,000,000 9,271,000,000 10,425,000,000 10,368,000,000 10,090,000,000 11,256,000,000 10,484,000,000 
        deferred revenue and accrued expenses
      1,543,000,000 2,087,000,000 1,868,000,000 1,726,000,000 1,499,000,000 2,211,000,000 2,027,000,000 1,891,000,000 1,638,000,000 2,104,000,000 1,868,000,000 1,685,000,000 1,485,000,000 1,915,000,000 1,640,000,000 1,534,000,000 1,398,000,000 1,926,000,000 1,829,000,000 1,782,000,000 1,526,000,000 2,161,000,000 1,733,000,000 1,504,000,000 1,329,000,000 1,784,000,000 1,521,000,000 1,240,000,000 1,647,000,000 1,357,000,000 1,239,000,000 1,711,000,000 1,472,000,000 1,311,000,000 1,282,000,000 1,109,000,000 752,000,000 520,000,000 443,000,000 418,000,000 489,000,000 414,000,000 455,000,000 541,000,000 279,000,000 285,000,000 287,000,000 323,000,000 349,000,000 
        current debt
       550,000,000 550,000,000 549,000,000 549,000,000    650,000,000 650,000,000 649,000,000 899,000,000 250,000,000 250,000,000 250,000,000  599,000,000 613,000,000 644,000,000 1,110,000,000 471,000,000 971,000,000 973,000,000 525,000,000 697,000,000 316,000,000 484,000,000 187,000,000                      
        current lease liabilities
      117,000,000 125,000,000 123,000,000 124,000,000 120,000,000 118,000,000 122,000,000 118,000,000 123,000,000 125,000,000 119,000,000 125,000,000 127,000,000 126,000,000 126,000,000 137,000,000 142,000,000 150,000,000 150,000,000 152,000,000 147,000,000 152,000,000 143,000,000 144,000,000 151,000,000 164,000,000 151,000,000 158,000,000                      
        other current liabilities
      906,000,000 797,000,000 735,000,000 752,000,000 923,000,000 765,000,000 735,000,000 740,000,000 767,000,000 678,000,000 630,000,000 652,000,000 814,000,000 716,000,000 851,000,000 969,000,000 1,137,000,000 1,015,000,000 950,000,000 751,000,000 965,000,000 888,000,000 811,000,000 804,000,000 858,000,000 802,000,000 801,000,000 940,000,000 864,000,000 814,000,000 867,000,000 804,000,000 793,000,000 882,000,000 812,000,000 972,000,000 558,000,000 488,000,000 522,000,000 467,000,000 381,000,000 358,000,000 333,000,000 327,000,000 289,000,000 334,000,000 274,000,000 318,000,000 343,000,000 
        total current liabilities
      13,547,000,000 14,004,000,000 13,243,000,000 13,871,000,000 13,384,000,000 12,598,000,000 12,535,000,000 12,674,000,000 13,118,000,000 12,630,000,000 11,305,000,000 11,969,000,000 14,889,000,000 14,779,000,000 14,122,000,000 14,692,000,000 14,914,000,000 14,724,000,000 18,616,000,000 19,174,000,000 19,020,000,000 19,332,000,000 19,220,000,000 19,019,000,000 18,624,000,000 16,070,000,000 16,736,000,000 17,654,000,000 15,301,000,000 16,382,000,000 15,804,000,000 14,755,000,000 14,556,000,000 15,029,000,000 14,217,000,000 15,256,000,000 12,801,000,000 11,881,000,000 12,495,000,000 10,984,000,000 10,135,000,000 10,765,000,000 10,671,000,000 10,194,000,000 11,086,000,000 11,091,000,000 10,820,000,000 12,083,000,000 11,358,000,000 
        long-term debt
      6,304,000,000 5,756,000,000 4,763,000,000 4,762,000,000 4,761,000,000 5,309,000,000 5,308,000,000 5,307,000,000 5,307,000,000 4,567,000,000 4,565,000,000 4,565,000,000 4,472,000,000 4,471,000,000 4,470,000,000 4,720,000,000 3,975,000,000 3,974,000,000 3,993,000,000 3,995,000,000 4,632,000,000 4,664,000,000 4,641,000,000 5,068,000,000 5,177,000,000 5,301,000,000 5,381,000,000 4,518,000,000 4,389,000,000 4,589,000,000 4,507,000,000 4,450,000,000 4,493,000,000 4,097,000,000 3,267,000,000 2,767,000,000 2,278,000,000 2,248,000,000 2,052,000,000 2,302,000,000 2,315,000,000 2,326,000,000 2,387,000,000 2,338,000,000 2,364,000,000 2,435,000,000 2,285,000,000 2,307,000,000 2,432,000,000 
        liability for pension benefits
      630,000,000 660,000,000 524,000,000 550,000,000 552,000,000 615,000,000 487,000,000 505,000,000 526,000,000 563,000,000 433,000,000 452,000,000 457,000,000 480,000,000 552,000,000 638,000,000 698,000,000 757,000,000 1,188,000,000 1,238,000,000 1,278,000,000 1,405,000,000 1,172,000,000 1,235,000,000 1,261,000,000 1,324,000,000 1,039,000,000 1,135,000,000 1,170,000,000 1,185,000,000 1,230,000,000 1,259,000,000 1,207,000,000 1,271,000,000 1,089,000,000 1,210,000,000 279,000,000 285,000,000 294,000,000 126,000,000 229,000,000 256,000,000 269,000,000 282,000,000 223,000,000 261,000,000 128,000,000 150,000,000 156,000,000 
        provision for liabilities
      361,000,000 340,000,000 369,000,000 369,000,000 359,000,000 341,000,000 416,000,000 409,000,000 377,000,000  360,000,000 386,000,000 366,000,000 357,000,000 365,000,000 378,000,000 385,000,000 375,000,000 401,000,000 399,000,000 390,000,000  560,000,000 534,000,000 541,000,000 537,000,000 555,000,000 543,000,000  546,000,000 624,000,000                   
        long-term lease liabilities
      485,000,000 472,000,000 475,000,000 500,000,000 498,000,000 502,000,000 556,000,000 564,000,000 570,000,000 592,000,000 569,000,000 602,000,000 610,000,000 620,000,000 608,000,000 645,000,000 715,000,000 734,000,000 800,000,000 838,000,000 857,000,000 918,000,000 915,000,000 906,000,000 914,000,000 964,000,000 957,000,000 961,000,000                      
        other non-current liabilities
      251,000,000 246,000,000 255,000,000 246,000,000 296,000,000 254,000,000 202,000,000 196,000,000 221,000,000 238,000,000 200,000,000 201,000,000 200,000,000 221,000,000 203,000,000 215,000,000 244,000,000 253,000,000 239,000,000 280,000,000 305,000,000 312,000,000 322,000,000 317,000,000 320,000,000 335,000,000 314,000,000 296,000,000 429,000,000 446,000,000 506,000,000 544,000,000 476,000,000 473,000,000 544,000,000 605,000,000 533,000,000 502,000,000 506,000,000 362,000,000 353,000,000 371,000,000 378,000,000 375,000,000 376,000,000 371,000,000 362,000,000 367,000,000 371,000,000 
        total non-current liabilities
      8,031,000,000 7,474,000,000 6,386,000,000 6,427,000,000 6,466,000,000 7,066,000,000 7,063,000,000 7,533,000,000 7,551,000,000 6,867,000,000 6,833,000,000 6,927,000,000 6,841,000,000 6,897,000,000 6,956,000,000 7,400,000,000 6,852,000,000 6,938,000,000 7,233,000,000 7,378,000,000 8,038,000,000 8,267,000,000 8,197,000,000 8,635,000,000 8,714,000,000 8,987,000,000 8,936,000,000 7,997,000,000 7,087,000,000 7,457,000,000 7,578,000,000 7,426,000,000 7,635,000,000 7,301,000,000 6,630,000,000 6,416,000,000 3,625,000,000 3,394,000,000 3,283,000,000 3,105,000,000 3,141,000,000 3,173,000,000 3,238,000,000 3,193,000,000 3,219,000,000 3,296,000,000 3,078,000,000 3,119,000,000 3,211,000,000 
        total liabilities
      21,578,000,000 21,478,000,000 19,629,000,000 20,298,000,000 19,850,000,000 19,664,000,000 19,598,000,000 20,207,000,000 20,669,000,000 19,497,000,000 18,138,000,000 18,896,000,000 21,730,000,000 21,676,000,000 21,078,000,000 22,092,000,000 21,766,000,000 21,662,000,000 25,849,000,000 26,552,000,000 27,058,000,000 27,599,000,000 27,417,000,000 27,654,000,000 27,338,000,000 25,057,000,000 25,672,000,000 25,651,000,000 22,388,000,000 23,839,000,000 23,382,000,000 22,181,000,000 22,191,000,000 22,330,000,000 20,847,000,000 21,672,000,000 16,426,000,000 15,275,000,000 15,778,000,000 14,089,000,000 13,276,000,000 13,938,000,000 13,909,000,000 13,387,000,000 14,305,000,000 14,387,000,000 13,898,000,000 15,202,000,000 14,569,000,000 
        commitments and contingencies
                                                       
        equity
                                                       
        additional paid-in capital
      11,239,000,000 11,106,000,000 11,037,000,000 11,012,000,000 11,017,000,000 10,989,000,000 10,957,000,000 10,943,000,000 10,930,000,000 10,910,000,000 10,903,000,000 10,910,000,000 10,890,000,000 10,876,000,000 10,855,000,000 10,855,000,000 10,826,000,000 10,804,000,000 10,786,000,000 10,785,000,000 10,765,000,000 10,748,000,000 10,724,000,000 10,713,000,000 10,703,000,000 10,687,000,000 10,667,000,000 10,630,000,000 10,615,000,000 10,566,000,000 10,548,000,000 10,538,000,000 10,501,000,000 10,658,000,000 10,536,000,000 10,436,000,000              
        accumulated deficit
      -392,000,000                                                 
        accumulated other comprehensive loss, net of tax
      -2,870,000,000 -2,834,000,000 -2,709,000,000 -2,706,000,000 -2,935,000,000 -3,158,000,000 -2,810,000,000 -2,921,000,000 -2,905,000,000 -2,856,000,000 -2,620,000,000 -2,540,000,000 -2,568,000,000 -2,621,000,000 -2,720,000,000 -2,486,000,000 -2,242,000,000 -2,186,000,000 -2,359,000,000 -2,278,000,000 -2,311,000,000 -2,359,000,000 -2,253,000,000 -2,390,000,000 -2,446,000,000 -2,227,000,000 -2,113,000,000 -1,974,000,000 -1,961,000,000 -1,605,000,000 -1,430,000,000 -1,513,000,000 -1,676,000,000 -1,776,000,000 -1,221,000,000 -1,053,000,000              
        total wtw shareholders’ equity
      7,977,000,000 7,976,000,000 7,735,000,000 8,100,000,000 8,133,000,000 7,940,000,000 7,492,000,000 9,337,000,000 9,489,000,000 9,520,000,000 9,410,000,000 9,799,000,000 10,096,000,000 10,016,000,000 9,838,000,000 10,337,000,000 11,004,000,000 13,260,000,000                                
        non-controlling interests
      82,000,000 76,000,000 75,000,000 80,000,000 81,000,000 77,000,000 78,000,000 78,000,000 79,000,000 73,000,000 75,000,000 78,000,000 80,000,000 77,000,000 75,000,000 80,000,000 71,000,000 48,000,000 40,000,000 45,000,000 48,000,000 112,000,000 105,000,000 121,000,000 126,000,000 120,000,000 114,000,000 122,000,000 119,000,000 119,000,000 130,000,000 123,000,000 111,000,000 124,000,000                
        total equity
      8,059,000,000 8,052,000,000 7,810,000,000 8,180,000,000 8,214,000,000 8,017,000,000 7,570,000,000 9,415,000,000 9,568,000,000 9,593,000,000 9,485,000,000 9,877,000,000 10,176,000,000 10,093,000,000 9,913,000,000 10,417,000,000 11,075,000,000 13,308,000,000 11,433,000,000 11,715,000,000 11,574,000,000 10,932,000,000 10,620,000,000 10,456,000,000 10,389,000,000 10,369,000,000 10,001,000,000 10,214,000,000 9,971,000,000 10,347,000,000 10,802,000,000 10,249,000,000 10,026,000,000 10,387,000,000 10,901,000,000 11,304,000,000              
        total liabilities and equity
      29,637,000,000 29,530,000,000 27,439,000,000 28,478,000,000 28,064,000,000 27,681,000,000 27,168,000,000 29,622,000,000 30,237,000,000 29,090,000,000 27,623,000,000 28,773,000,000 31,906,000,000 31,769,000,000 30,991,000,000 32,509,000,000 32,841,000,000 34,970,000,000 37,282,000,000 38,267,000,000 38,632,000,000 38,531,000,000 38,037,000,000 38,110,000,000 37,727,000,000 35,426,000,000 35,703,000,000 35,893,000,000 32,385,000,000 34,213,000,000 34,212,000,000 32,458,000,000 32,272,000,000 32,774,000,000 31,801,000,000 33,029,000,000              
        (accumulated deficit)/retained earnings
       -296,000,000 -593,000,000 -206,000,000   -650,000,000                                           
        retained earnings
          51,000,000 109,000,000  1,315,000,000 1,464,000,000 1,466,000,000 1,127,000,000 1,429,000,000 1,774,000,000 1,764,000,000 1,706,000,000 1,971,000,000 2,423,000,000 4,645,000,000 2,969,000,000 3,166,000,000 3,075,000,000 2,434,000,000 2,047,000,000 2,015,000,000 2,009,000,000 1,792,000,000 1,336,000,000 1,439,000,000 1,201,000,000 1,270,000,000 1,557,000,000 1,104,000,000 1,130,000,000 1,402,000,000 1,455,000,000 1,771,000,000              
        deferred tax liabilities
           45,000,000 94,000,000 552,000,000 550,000,000 542,000,000 706,000,000 721,000,000 736,000,000 748,000,000 758,000,000 804,000,000 835,000,000 845,000,000 612,000,000 628,000,000 576,000,000 561,000,000 587,000,000 575,000,000 501,000,000 526,000,000 690,000,000 544,000,000 559,000,000 691,000,000 711,000,000 615,000,000 856,000,000 823,000,000 1,137,000,000 1,234,000,000 240,000,000 20,000,000 21,000,000 28,000,000 18,000,000 32,000,000 23,000,000 21,000,000 20,000,000 25,000,000 17,000,000 22,000,000 8,000,000 
        current assets held for sale
            1,089,000,000        5,000,000 5,000,000 7,000,000 6,000,000 4,961,000,000                               
        current liabilities held for sale
            475,000,000        65,000,000 64,000,000 7,000,000 6,000,000 4,120,000,000                               
        treasury shares, at cost, 15,574 shares in 2024
            -5,000,000                                           
        benefit from liabilities
               365,000,000            407,000,000       540,000,000   558,000,000 603,000,000 637,000,000 593,000,000 600,000,000              
        treasury shares, at cost, 17,519 in 2022
                                                       
        treasury shares, at cost, 17,519 shares in 2022
                                                       
        treasury shares, at cost, 17,519 in 2022 and 2021
                   -3,000,000                                    
        treasury shares, at cost, 17,519 shares in 2022 and 2021
                    -3,000,000  -3,000,000                                 
        treasury shares, at cost, 128,391 shares in 2022 and 17,519 in 2021
                     -3,000,000                                  
        non-current assets held for sale
                                                       
        non-current liabilities held for sale
                                                       
        treasury shares, at cost, 17,519 in 2021 and 2020
                       -3,000,000                                
        treasury shares, at cost, 17,519 shares in 2021 and 2020
                        -3,000,000 -3,000,000 -3,000,000                             
        total willis towers watson shareholders’ equity
                        11,393,000,000 11,670,000,000 11,526,000,000 10,820,000,000 10,515,000,000 10,335,000,000 10,263,000,000 10,249,000,000 9,887,000,000 10,092,000,000 9,852,000,000 10,228,000,000 10,672,000,000 10,126,000,000 9,915,000,000 10,263,000,000 10,767,000,000 11,151,000,000              
        treasury shares, at cost, 17,519 in 2020 and 2019 and 40,000 shares, €1 nominal value, in 2019
                           -3,000,000                            
        treasury shares, at cost, 17,519 shares in 2020 and 2019, and 40,000 shares, €1 nominal value in 2019
                            -3,000,000 -3,000,000                          
        treasury shares, at cost, 17,519 shares in 2020 and 2019, and 40,000 shares, €1 nominal value, in 2020 and 2019
                              -3,000,000                         
        redeemable non-controlling interest
                                30,000,000 28,000,000 26,000,000 27,000,000 28,000,000 28,000,000 55,000,000 57,000,000                
        treasury shares, at cost, 17,519 in 2019 and 2018 and 40,000 shares, €1 nominal value, in 2019 and 2018
                               -3,000,000                        
        treasury shares, at cost, 17,519 shares in 2019 and 2018, and 40,000 shares, €1 nominal value, in 2019 and 2018
                                -3,000,000 -3,000,000                      
        short-term debt and current portion of long-term debt
                                  186,000,000 85,000,000 85,000,000 85,000,000 85,000,000 85,000,000 519,000,000 1,144,000,000 988,000,000   15,000,000 17,000,000 17,000,000 15,000,000 15,000,000 15,000,000 17,000,000 114,000,000 114,000,000 145,000,000 
        treasury shares, at cost, 17,519 in 2018 and 2017 and 40,000 shares, €1 nominal value, in 2018 and 2017
                                  -3,000,000                     
        treasury shares, at cost, 17,519 shares in 2018 and 2017, and 40,000 shares, €1 nominal value, in 2018 and 2017
                                   -3,000,000 -3,000,000                   
        treasury shares, at cost, 17,519 in 2017 and 795,816 in 2016, and 40,000 shares, €1 nominal value, in 2017 and 2016
                                     -3,000,000                  
        treasury shares, at cost, 263,899 shares in 2017 and 795,816 shares in 2016, and 40,000 shares, €1 nominal value, in 2017 and 2016
                                      -40,000,000                 
        treasury shares, at cost, 149,572 shares in 2017 and 795,816 shares in 2016, and 40,000 shares, €1 nominal value, in 2017 and 2016
                                       -21,000,000                
        redeemable noncontrolling interest
                                        53,000,000 53,000,000              
        ordinary shares, 0.000304635 nominal value; authorized: 1,510,003,775; issued 137,206,851 shares in 2016 and 68,624,892 in 2015
                                                       
        ordinary shares, €1 nominal value; authorized: 40,000; issued 40,000 shares in 2016 and 2015
                                                       
        preference shares, 0.000115 nominal value; authorized: 1,000,000,000; issued nil shares in 2016 and 2015
                                                       
        treasury shares, at cost, 17,519 shares in 2016 and 2015, and 40,000 shares, €1 nominal value, in 2016 and 2015
                                        -3,000,000 -3,000,000              
        noncontrolling interests
                                        134,000,000 153,000,000              
        ordinary shares, 0.000304635 nominal value; authorized: 1,510,003,775; issued 138,398,396 shares in 2016 and 68,624,892 in 2015
                                                       
        current assets
                                                       
        other current assets
                                          255,000,000 240,000,000 222,000,000 195,000,000 195,000,000 207,000,000 186,000,000 181,000,000 317,000,000 325,000,000 315,000,000 327,000,000 369,000,000 
        non-current assets
                                                       
        investments in associates
                                          13,000,000 171,000,000 168,000,000 190,000,000 184,000,000 177,000,000 183,000,000 174,000,000 175,000,000 187,000,000 186,000,000 186,000,000 193,000,000 
        deferred tax assets
                                          76,000,000 19,000,000 9,000,000 11,000,000 14,000,000 10,000,000 16,000,000 13,000,000 42,000,000 51,000,000 21,000,000 32,000,000 27,000,000 
        pension benefits asset
                                          623,000,000 700,000,000 677,000,000 359,000,000 253,000,000 213,000,000 181,000,000 136,000,000 241,000,000 170,000,000 261,000,000 231,000,000 202,000,000 
        liabilities and stockholders’ equity
                                                       
        current liabilities
                                                       
        income taxes payable
                                          45,000,000 21,000,000 35,000,000 73,000,000 33,000,000 34,000,000 34,000,000 19,000,000 58,000,000 62,000,000 38,000,000 50,000,000 29,000,000 
        non-current liabilities
                                                       
        provisions for liabilities
                                          295,000,000 199,000,000 220,000,000 212,000,000 208,000,000 202,000,000 189,000,000 180,000,000 181,000,000 182,000,000 179,000,000 184,000,000 187,000,000 
        current portion of long-term debt
                                           323,000,000 468,000,000           
      Cashflow Statements:
      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 2019-03-31 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2016-03-31 2015-09-30 2013-09-30 2013-06-30 2013-03-31 2012-03-31 
                                             
          cash flows from operating activities
                                             
          net income
        303,000,000 736,000,000 306,000,000 332,000,000 239,000,000 1,248,000,000 -1,672,000,000 142,000,000 194,000,000 623,000,000 139,000,000 96,000,000 206,000,000 593,000,000 192,000,000 114,000,000 125,000,000 2,407,000,000 907,000,000 186,000,000 736,000,000 483,000,000 122,000,000 102,000,000 313,000,000 551,000,000 293,000,000 65,000,000 221,000,000 253,000,000 -54,000,000 245,000,000 116,000,000 -27,000,000 107,000,000 223,000,000 232,000,000 
          adjustments to reconcile net income to total net cash from operating activities:
                                             
          depreciation
        56,000,000 59,000,000 56,000,000 57,000,000 54,000,000 54,000,000 60,000,000 57,000,000 59,000,000 58,000,000 60,000,000 64,000,000 60,000,000 64,000,000 60,000,000 65,000,000 66,000,000 69,000,000 69,000,000 72,000,000 71,000,000 70,000,000 73,000,000 67,000,000 98,000,000 69,000,000 54,000,000 53,000,000 51,000,000 83,000,000 57,000,000       
          amortization
        48,000,000 48,000,000 47,000,000 49,000,000 48,000,000 50,000,000 56,000,000 60,000,000 60,000,000 60,000,000 62,000,000 70,000,000 71,000,000 73,000,000 71,000,000 83,000,000 85,000,000 83,000,000 85,000,000 98,000,000 103,000,000 114,000,000 108,000,000 119,000,000 121,000,000 121,000,000 127,000,000 140,000,000 141,000,000 140,000,000 141,000,000       
          non-cash lease expense
        25,000,000 26,000,000 24,000,000 22,000,000 25,000,000 22,000,000 27,000,000 22,000,000 27,000,000 22,000,000 25,000,000 31,000,000 27,000,000 26,000,000 30,000,000 31,000,000 33,000,000 52,000,000 35,000,000 36,000,000 37,000,000 36,000,000 36,000,000 40,000,000 34,000,000 41,000,000 36,000,000           
          net periodic cost of defined benefit pension plans
        6,000,000                                    1,000,000 
          provision for doubtful receivables from clients
        6,000,000 -2,000,000 1,000,000 2,000,000 5,000,000 3,000,000 2,000,000 8,000,000  3,000,000 -2,000,000 7,000,000 1,000,000 7,000,000 5,000,000 6,000,000 5,000,000 8,000,000  4,000,000 24,000,000 -3,000,000 8,000,000 3,000,000 7,000,000         
          benefit from deferred income taxes
        -30,000,000  8,000,000 -47,000,000 -23,000,000 166,000,000 -354,000,000 -16,000,000 -9,000,000  -21,000,000 -22,000,000 -15,000,000            -23,000,000 -28,000,000 -28,000,000 -22,000,000 -26,000,000 -229,000,000 18,000,000   7,000,000    
          share-based compensation
        42,000,000 49,000,000 36,000,000 31,000,000 37,000,000 36,000,000 31,000,000 30,000,000 24,000,000 38,000,000 29,000,000 32,000,000 26,000,000 28,000,000 24,000,000 25,000,000 22,000,000 30,000,000 19,000,000 25,000,000 27,000,000 31,000,000 31,000,000 29,000,000 -1,000,000 26,000,000 10,000,000 1,000,000 3,000,000 19,000,000 15,000,000 35,000,000 12,000,000 10,000,000 9,000,000 12,000,000 9,000,000 
          gain on disposal of operations
           -14,000,000                                 
          non-cash foreign exchange loss
        -14,000,000 -17,000,000 21,000,000 9,000,000 -6,000,000 -13,000,000 -11,000,000 -1,000,000  -5,000,000 -5,000,000 11,000,000          2,000,000 -12,000,000 10,000,000 8,000,000 -2,000,000 17,000,000         
          other
        18,000,000 25,000,000 16,000,000 9,000,000 9,000,000 26,000,000 10,000,000 14,000,000 8,000,000 10,000,000 5,000,000 6,000,000 10,000,000 7,000,000 11,000,000 -7,000,000 -5,000,000 -4,000,000 -9,000,000 12,000,000 -24,000,000 -20,000,000 -22,000,000 -22,000,000 23,000,000 28,000,000 4,000,000 11,000,000 -8,000,000 -36,000,000 -54,000,000       
          changes in operating assets and liabilities, net of effects from purchase of subsidiaries:
                                             
          accounts receivable
        75,000,000 -510,000,000 157,000,000 63,000,000 162,000,000 -504,000,000 153,000,000 5,000,000 113,000,000 -467,000,000 97,000,000 35,000,000 129,000,000 -458,000,000 90,000,000 98,000,000 82,000,000 -309,000,000 214,000,000 76,000,000 -115,000,000 -287,000,000 231,000,000 174,000,000 -46,000,000 -454,000,000 -121,000,000 124,000,000 -43,000,000 -95,000,000 205,000,000 -161,000,000 105,000,000 68,000,000 4,000,000 -128,000,000 -80,000,000 
          other assets
        -51,000,000 26,000,000 -43,000,000 -100,000,000 1,000,000 -74,000,000 -138,000,000 -108,000,000 -53,000,000 -10,000,000 -94,000,000 -92,000,000 11,000,000 1,000,000 -87,000,000 -89,000,000 -22,000,000 13,000,000 -44,000,000 -76,000,000 -15,000,000 -127,000,000 -160,000,000 75,000,000 7,000,000 133,000,000 -37,000,000 24,000,000 46,000,000 -33,000,000 121,000,000 -118,000,000 -24,000,000 35,000,000 -17,000,000 -4,000,000 -7,000,000 
          other liabilities
        -517,000,000 231,000,000 89,000,000 -87,000,000 -691,000,000 460,000,000 83,000,000 184,000,000 -426,000,000 207,000,000 155,000,000 65,000,000 -411,000,000 15,000,000 63,000,000 -115,000,000 -458,000,000 24,000,000 307,000,000 50,000,000 -556,000,000 432,000,000 200,000,000 65,000,000 -482,000,000 32,000,000 -379,000,000 68,000,000 -393,000,000 300,000,000 -278,000,000 -81,000,000 40,000,000 80,000,000 72,000,000 142,000,000 74,000,000 
          provisions
        23,000,000 -29,000,000 1,000,000 3,000,000 16,000,000 -69,000,000 3,000,000 32,000,000 13,000,000 1,000,000 -23,000,000 18,000,000 8,000,000 -15,000,000 -6,000,000 13,000,000 -25,000,000 6,000,000 8,000,000 -7,000,000 -161,000,000 20,000,000 -10,000,000 13,000,000 -25,000,000 10,000,000 -66,000,000 49,000,000 -47,000,000 -40,000,000       
          net cash from operating activities
        -10,000,000 771,000,000 678,000,000   599,000,000 482,000,000 407,000,000 24,000,000 522,000,000 393,000,000 296,000,000 134,000,000 375,000,000 179,000,000 237,000,000 21,000,000 184,000,000 1,511,000,000   568,000,000 521,000,000 662,000,000 23,000,000 461,000,000  377,000,000 18,000,000 347,000,000 196,000,000 118,000,000 106,000,000  98,000,000 39,000,000  
          capital expenditures
          -26,000,000 -27,000,000 -29,000,000 -27,000,000 -23,000,000 -25,000,000 -22,000,000 -19,000,000 -16,000,000 -17,000,000 -18,000,000 -15,000,000 -13,000,000 -13,000,000   -14,000,000 -16,000,000 -18,000,000 -15,000,000 -16,000,000  -12,000,000 -13,000,000 -23,000,000 -20,000,000 -18,000,000   
          free cash flows
        -10,000,000 771,000,000 678,000,000   573,000,000 455,000,000 378,000,000 -3,000,000 499,000,000 368,000,000 274,000,000 115,000,000 359,000,000 162,000,000 219,000,000 6,000,000 171,000,000 1,498,000,000   554,000,000 505,000,000 644,000,000 8,000,000 445,000,000  365,000,000 5,000,000 324,000,000 176,000,000 100,000,000 106,000,000  98,000,000 39,000,000  
          cash flows from investing activities
                                             
          additions to fixed assets and software
        -55,000,000 -63,000,000 -57,000,000 -58,000,000 -51,000,000                                 
          acquisitions of operations, net of cash acquired
        -792,000,000 -1,000,000 -13,000,000 -1,000,000 -79,000,000 -10,000,000 -3,000,000 -15,000,000 -2,000,000 -4,000,000 -1,000,000 -4,000,000 -8,000,000 -68,000,000     -3,000,000 -66,000,000 -5,000,000 -1,000,000 -3,000,000 -5,000,000 469,000,000 -65,000,000     
          contributions to investments in associates
        -9,000,000 -19,000,000 -8,000,000                                   
          net sales/(purchases) of available-for-sale securities
        16,000,000                                     
          net cash from investing activities
        -840,000,000 -83,000,000 -82,000,000 696,000,000 -84,000,000 480,000,000 -72,000,000 -84,000,000 -74,000,000       -55,000,000 74,000,000 1,993,000,000 -13,000,000 -55,000,000 645,000,000 -52,000,000 141,000,000 -87,000,000 -162,000,000 -83,000,000 -75,000,000 -74,000,000 -79,000,000   417,000,000 -100,000,000  -54,000,000 -21,000,000  
          cash flows (used in)/from financing activities
                                             
          borrowing of other debt
        550,000,000                                     
          debt issuance costs
        -4,000,000     -2,000,000 -7,000,000 -1,000,000                   
          repayments of debt
        -551,000,000 -1,000,000 -2,000,000 -1,000,000 -1,000,000 -2,000,000 -1,000,000 -651,000,000 -1,000,000 -1,000,000 -251,000,000 -1,000,000 -1,000,000 -2,000,000 -582,000,000 -1,000,000 -38,000,000 -455,000,000 -7,000,000 -508,000,000 -8,000,000 -8,000,000 -183,000,000 -128,000,000 -170,000,000 -1,000,000 -22,000,000 -21,000,000 -20,000,000 -19,000,000 -1,181,000,000 -151,000,000 -524,000,000 -4,000,000 -4,000,000 -2,000,000 
          repurchase of shares
        -300,000,000 -350,000,000 -600,000,000 -500,000,000 -200,000,000 -395,000,000 -205,000,000 -200,000,000 -101,000,000 -196,000,000 -350,000,000 -350,000,000 -104,000,000 -440,000,000 -369,000,000 -471,000,000 -2,250,000,000 -627,000,000        -3,000,000    -70,000,000 -166,000,000  -3,000,000    -19,000,000 
          net proceeds from fiduciary funds held for clients
        192,000,000 -171,000,000 202,000,000 -174,000,000 315,000,000 -149,000,000 151,000,000 -228,000,000 1,011,000,000  123,000,000   197,000,000 72,000,000                       
          cash paid for employee taxes on withholding shares
        -2,000,000 -3,000,000 -10,000,000 -41,000,000 -2,000,000 -26,000,000 -6,000,000 -19,000,000 -5,000,000 -5,000,000 -4,000,000 -12,000,000 -5,000,000 -2,000,000 -27,000,000 -4,000,000 -1,000,000 -8,000,000 -7,000,000   -13,000,000   -1,000,000  -23,000,000 -7,000,000 -4,000,000 -11,000,000       
          dividends paid
        -88,000,000 -89,000,000 -90,000,000 -91,000,000 -88,000,000 -89,000,000 -89,000,000 -90,000,000 -86,000,000 -87,000,000 -88,000,000 -90,000,000 -87,000,000 -89,000,000 -91,000,000 -91,000,000 -98,000,000 -99,000,000 -6,000,000 -177,000,000 -92,000,000 -87,000,000 -88,000,000 -87,000,000 -84,000,000 -84,000,000 -77,000,000 -81,000,000 -68,000,000 -68,000,000 -72,000,000  -56,000,000 -49,000,000 -48,000,000 -47,000,000 -46,000,000 
          net cash (used in)/from financing activities
        -203,000,000  -511,000,000                  -633,000,000 -100,000,000       -24,000,000         
          decrease in cash, cash equivalents and restricted cash
        -1,053,000,000          -217,000,000 -338,000,000 -380,000,000  -317,000,000 72,000,000 -2,485,000,000                     
          effect of exchange rate changes on cash, cash equivalents and restricted cash
        -29,000,000 1,000,000 -5,000,000 127,000,000 80,000,000 -129,000,000 85,000,000 -6,000,000 -47,000,000 65,000,000 -55,000,000 -20,000,000 21,000,000 126,000,000 -120,000,000 -136,000,000 -34,000,000 -103,000,000 -14,000,000 4,000,000 -14,000,000 26,000,000 17,000,000 14,000,000 -36,000,000 20,000,000            
          cash, cash equivalents and restricted cash, beginning of period
        6,487,000,000  4,998,000,000  3,792,000,000  4,721,000,000  7,691,000,000  2,096,000,000  895,000,000             
          cash, cash equivalents and restricted cash, end of period
        5,405,000,000  80,000,000 360,000,000 4,983,000,000  336,000,000 -875,000,000 5,251,000,000  -272,000,000 -358,000,000 4,362,000,000  -437,000,000 -64,000,000 5,172,000,000  255,000,000 1,966,000,000  560,000,000 188,000,000 906,000,000             
          impairment
                    81,000,000                     
          non-cash restructuring charges
             24,000,000 5,000,000 1,000,000 11,000,000 19,000,000 11,000,000 6,000,000 2,000,000 15,000,000 7,000,000                       
          net periodic cost of/(credit for) defined benefit pension plans
                                             
          provision for deferred income taxes
                     42,000,000 -47,000,000 -28,000,000 -17,000,000 185,000,000 -15,000,000 46,000,000 10,000,000  15,000,000             2,000,000  
          net loss on disposal of operations
             -853,000,000     -41,000,000   -17,000,000 -20,000,000 40,000,000 56,000,000           9,000,000         
          net proceeds from sale of operations
         34,000,000                30,000,000 696,000,000 210,000,000    4,000,000         
          cash and fiduciary funds transferred in sale of operations
                -6,000,000   -17,000,000 -12,000,000                     
          net purchases of held-to-maturity securities
                                           
          net purchases of available-for-sale securities
         3,000,000                                   
          cash flows from financing activities
                                             
          senior notes issued
             746,000,000              -1,000,000 997,000,000      
          payments of deferred and contingent consideration related to acquisitions
         -4,000,000      -4,000,000 -1,000,000 -1,000,000 -6,000,000 -2,000,000 -20,000,000 -2,000,000 -17,000,000     -10,000,000    -22,000,000 1,000,000       
          acquisitions of and dividends paid to non-controlling interests
         -7,000,000   -3,000,000 -7,000,000 -2,000,000 -1,000,000 -16,000,000 -43,000,000   -2,000,000 -6,000,000   -1,000,000 -14,000,000 -4,000,000 -17,000,000 -1,000,000 -13,000,000 -13,000,000 -1,000,000 -33,000,000    -32,000,000 -5,000,000       
          net cash from financing activities
            24,000,000 -664,000,000 -159,000,000 -1,192,000,000 1,556,000,000 -472,000,000 -615,000,000 340,000,000 -453,000,000  -419,000,000 -110,000,000 -2,580,000,000  -1,484,000,000     -401,000,000 186,000,000 -377,000,000 82,000,000    -50,000,000 -115,000,000 -10,000,000  -68,000,000 18,000,000  
          increase in cash, cash equivalents and restricted cash
         1,063,000,000 85,000,000 233,000,000 -95,000,000 415,000,000 251,000,000 -869,000,000 1,506,000,000         1,368,000,000 14,000,000 251,000,000 -116,000,000  543,000,000 174,000,000 47,000,000             
          cash, cash equivalents and restricted cash, beginning of year
                                             
          cash, cash equivalents and restricted cash, end of year
                                             
          net periodic cost/(benefit) of defined benefit pension plans
          6,000,000 6,000,000 88,000,000                                 
          loss on disposal of operations
                                             
          cash flows (used in)/from operating activities
                                             
          net cash (used in)/from operating activities
            -35,000,000                -128,000,000      -47,000,000           
          sale of investments
            -32,000,000    1,000,000  -3,000,000 -7,000,000 4,000,000 200,000,000                     
          additions to fixed assets and software for internal use
             -30,000,000 -36,000,000 -37,000,000 -33,000,000 -37,000,000 -36,000,000 -38,000,000 -42,000,000 -38,000,000 -40,000,000 -29,000,000 -31,000,000 -39,000,000 -30,000,000 -42,000,000 -37,000,000 -40,000,000 -48,000,000 -69,000,000 -66,000,000 -71,000,000 -57,000,000 -76,000,000 -65,000,000 -102,000,000 -79,000,000 -48,000,000      
          capitalized software costs
             -26,000,000 -27,000,000 -29,000,000 -27,000,000 -23,000,000 -25,000,000 -22,000,000 -19,000,000 -16,000,000 -17,000,000 -18,000,000 -15,000,000 -13,000,000 -13,000,000 -13,000,000 -14,000,000 -14,000,000 -16,000,000 -18,000,000 -15,000,000 -16,000,000 -17,000,000 -12,000,000 -13,000,000 -23,000,000 -20,000,000 -18,000,000      
          proceeds from issuance of shares
                     6,000,000 1,000,000 8,000,000 1,000,000 1,000,000 8,000,000 3,000,000 2,000,000 3,000,000 14,000,000 22,000,000 7,000,000 11,000,000 17,000,000 7,000,000       
          net periodic benefit of defined benefit pension plans
              -4,000,000 -7,000,000 -4,000,000 -6,000,000 -9,000,000 -3,000,000 -8,000,000 -40,000,000 -33,000,000 -40,000,000 -40,000,000 -43,000,000 -44,000,000 -39,000,000 -42,000,000 -54,000,000 -50,000,000 -46,000,000 -46,000,000 -42,000,000 -32,000,000 -17,000,000 -61,000,000 15,000,000 -41,000,000 -23,000,000      
          proceeds from sale of operations
                  77,000,000                           
          purchase of investments
              1,000,000                               
          net gain on disposal of operations
                            -359,000,000                 
          benefit from doubtful receivables from clients
                                     2,000,000 4,000,000       
          (benefit from)/benefit from deferred income taxes
                                             
          net (gain)/loss on disposal of operations
                                             
          non-cash foreign exchange loss/
                                     -2,000,000        
          cash flows (used in)/from investing activities
                                             
          net proceeds/(payments) from sale of operations
                                             
          (purchase)/sale of investments
                                             
          net cash (used in)/from investing activities
                   -974,000,000 -61,000,000 -115,000,000                -73,000,000        
          cash flows used in financing activities
                                             
          net (payments)/proceeds from fiduciary funds held for clients
                                             
          net payments from fiduciary funds held for clients
                    -250,000,000    -211,000,000                     
          non-cash foreign exchange gain
                     41,000,000 -177,000,000 4,000,000 -5,000,000  -1,000,000 -2,000,000 -2,000,000                 
          net payments on revolving credit facility
                                       -338,000,000      
          proceeds from issuance of other debt
                                          
          fiduciary assets
                          483,000,000 586,000,000 -1,784,000,000 679,000,000 747,000,000 -327,000,000 -2,873,000,000 977,000,000 -2,490,000,000 -867,000,000 -1,326,000,000 66,000,000 701,000,000 -1,379,000,000 361,000,000 830,000,000 -131,000,000 -672,000,000 -924,000,000 
          fiduciary liabilities
                          -483,000,000 -586,000,000 1,784,000,000 -679,000,000 -747,000,000 327,000,000 2,873,000,000 -977,000,000 2,490,000,000 867,000,000 1,326,000,000 -66,000,000 -701,000,000 1,379,000,000 -361,000,000 -830,000,000 131,000,000 672,000,000 924,000,000 
          net borrowings on revolving credit facility
                                396,000,000  138,000,000 136,000,000 61,000,000         
          benefit from/(benefit from) deferred income taxes
                                             
          non-cash foreign exchange (gain)/loss
                                             
          cash flows used in investing activities
                                             
          increase/(decrease) in cash, cash equivalents and restricted cash
                                             
          net (payments)/borrowings on revolving credit facility
                                             
          payments related to share cancellation
                                             
          cash and cash equivalents, beginning of year
                                             
          cash and cash equivalents, beginning of period
                                  1,033,000,000 1,030,000,000  532,000,000 500,000,000 436,000,000 
          decrease in cash and cash equivalents
                                  -40,000,000      -4,000,000     
          effect of exchange rate changes on cash and cash equivalents
                                  -1,000,000 -35,000,000 9,000,000 77,000,000 21,000,000 2,000,000 -13,000,000 3,000,000 -4,000,000 -5,000,000 3,000,000 
          cash and cash equivalents, end of period
                                  992,000,000 -43,000,000 954,000,000  60,000,000 954,000,000 -17,000,000 120,000,000 -28,000,000 531,000,000 464,000,000 
          net income/(gain) on disposal of operations
                                             
          increase in cash and cash equivalents
                                    -85,000,000   420,000,000  117,000,000 -24,000,000 36,000,000 25,000,000 
          cash and cash equivalents, end of year
                                             
          amortization of non-current deferred fulfillment costs
                                    5,000,000         
          net gain on disposal of operations and fixed and intangible assets and gain on re-measurement of equity interests
                                             
          net disposals of operations
                                             
          net borrowings/(payments) on revolving credit facility
                                     -33,000,000 392,000,000       
          payments for share cancellation related to legal settlement
                                             
          increase/(decrease) in cash and cash equivalents
                                             
          net income on disposal of operations
                                             
          net cash from/(used in) investing activities
                                             
          (decrease)/increase in cash and cash equivalents
                                             
          net gain on disposal of operations and fixed and intangible assets
                                        -15,000,000 -2,000,000 -1,000,000 -3,000,000 
          movement on provisions
                                       69,000,000 -16,000,000 1,000,000 14,000,000 13,000,000 -17,000,000 
          cash flows from/(used in) investing activities
                                             
          net (repayments)/borrowings on revolving credit facility
                                             
          proceeds from issue of other debt
                                       400,000,000      
          proceeds from issuance of shares and excess tax benefit
                                       11,000,000      
          acquisitions of and dividends paid to noncontrolling interests
                                       -4,000,000      
          supplemental disclosures:
                                             
          cash paid for interest
                                       54,000,000      
          cash paid for income taxes
                                       19,000,000      
          issuance of shares and assumed awards in connection with the merger
                                             
          cash flows from (used in) operating activities
                                             
          depreciation expense
                                       43,000,000 25,000,000 21,000,000 21,000,000 26,000,000 19,000,000 
          amortization of intangible assets
                                       161,000,000 23,000,000 14,000,000 14,000,000 14,000,000 15,000,000 
          benefit from doubtful accounts
                                       13,000,000      
          (benefit from) benefit from deferred income taxes
                                       -70,000,000      
          effect of exchange rate changes on net income
                                       5,000,000 14,000,000 3,000,000 -4,000,000 -5,000,000 -5,000,000 
          cash flows from (used in) investing activities
                                             
          redemptions of held-to-maturity investments
                                       11,000,000      
          sales and redemptions of available for sale securities
                                       9,000,000      
          amortization of cash retention awards
                                        4,000,000 2,000,000 1,000,000 2,000,000 62,000,000 
          net periodic income of defined benefit pension plans
                                        -21,000,000     
          benefit from doubtful debts
                                        2,000,000 1,000,000   4,000,000 
          net movement in deferred taxes
                                             
          excess tax benefits from share-based payment arrangements
                                           
          net gain on derivative instruments
                                             
          undistributed earnings of associates
                                        -3,000,000 1,000,000 9,000,000 -13,000,000 -15,000,000 
          change in operating assets and liabilities, net of effects from purchase of subsidiaries:
                                             
          cash incentives paid
                                        -28,000,000 -28,000,000    
          funding of defined benefit pension plans
                                        -24,000,000 -48,000,000 -33,000,000 -44,000,000 -33,000,000 
          proceeds on disposal of fixed and intangible assets
                                        2,000,000 1,000,000 4,000,000 4,000,000 3,000,000 
          additions to fixed assets
                                        -53,000,000 -27,000,000 -28,000,000 -23,000,000 -36,000,000 
          additions to intangible assets
                                        -1,000,000    
          payments to acquire other investments, net of distributions received
                                             
          proceeds on sale of operations, net of cash disposed
                                        17,000,000     
          note
                                        2,013,000,000  
          net proceeds from draw down of revolving credit facilities
                                             
          proceeds from issue of shares
                                        11,000,000 43,000,000 43,000,000 19,000,000 11,000,000 
          acquisition of noncontrolling interests
                                         -4,000,000 -29,000,000 
          dividends paid to noncontrolling interests
                                        -6,000,000 -1,000,000 -7,000,000 -1,000,000 -3,000,000 
          gain on derivative instruments
                                         25,000,000 -1,000,000 -4,000,000  
          proceeds from draw down of revolving credit facilities
                                            
          net cash from continuing operating activities
                                            62,000,000 
          acquisitions of subsidiaries, net of cash acquired
                                         -1,000,000 -28,000,000 -1,000,000 -2,000,000 
          payments to acquire other investments
                                         -3,000,000 -1,000,000 -1,000,000 -2,000,000 
          net cash from continuing investing activities
                                            -37,000,000 
          net cash from continuing financing activities
                                             
          income from discontinued operations
                                             
          net periodic (income) cost of defined benefit pension plans
                                         -1,000,000 -1,000,000 -1,000,000  
          tender premium included in loss on extinguishment of debt
                                             
          increase in cash and cash equivalents from operating and investing activities
                                         199,000,000 44,000,000 18,000,000 25,000,000 
          tender premium on extinguishment of senior notes
                                             
          proceeds from sale of noncontrolling interests
                                            3,000,000 
          provision for doubtful debts
                                           1,000,000  
          cash awards paid
                                           -196,000,000  
          proceeds from draw down of revolving credit facility
                                           55,000,000 85,000,000 
          benefit for deferred income taxes
                                            -2,000,000 
          make-whole on repurchase and redemption of senior notes and write-off of unamortized debt issuance costs
                                             
          cash retention awards paid
                                            -192,000,000 
          acquisition of investments in associates
                                             
          proceeds from (repayment on) draw down of revolving credit facility
                                             
          make-whole on repurchase and redemption of senior notes
                                             
          adjustments to reconcile net income to total net cash provided by operating activities:
                                             
          net loss on disposal of operations and fixed and intangible assets
                                             
          non-cash venezuela currency devaluation
                                             
          investment in trident v parallel fund, lp
                                             
          (repayment of) proceeds from draw down of revolving credit facility