7Baggers
Quarterly
Annual
    Unit: USD2025-03-31 2024-12-31 2024-03-31 2023-12-31 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-03-31 2020-12-31 2020-09-30 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 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 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 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 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 
      
                                                                    
      cash flows from operations:
                                                                    
      net income
    62,800,000 -124,400,000 221,800,000 362,700,000 187,200,000 61,500,000 869,500,000 -210,200,000 -8,400,000 -110,500,000 473,400,000 222,000,000 45,300,000 43,200,000 15,900,000 272,200,000 -140,500,000 -66,600,000 12,000,000 544,700,000 3,400,000 33,000,000 -50,600,000 88,600,000 362,500,000 19,300,000 274,000,000 -74,900,000 3,400,000 77,000,000 40,300,000 100,200,000 95,100,000 118,200,000 56,100,000 15,200,000 119,900,000 -11,600,000 38,200,000 110,600,000 820,500,000 -26,800,000 32,500,000 -16,800,000 89,500,000 75,000,000 13,200,000 -38,200,000    30,300,000 -212,600,000 -276,700,000 -9,200,000 -56,800,000 102,600,000 92,200,000 299,300,000 162,100,000 115,800,000 96,000,000 33,300,000 -66,300,000 
      adjustments to reconcile net income to net cash provided from (used for) operations:
                                                                    
      net realized and unrealized investment (gains) losses
    -86,600,000 83,800,000 -16,200,000 -217,000,000 -112,900,000 -43,400,000 29,400,000 104,100,000 8,400,000 -1,100,000     -35,200,000 -245,600,000      -51,300,000                                           
      net realized and unrealized investment (gains) losses from investment in mediaalpha
    36,600,000 121,700,000 -210,700,000 -66,000,000 -85,200,000 -20,300,000 18,600,000 113,500,000 -18,800,000                                                        
      change in fair value of contingent consideration - ark
    9,700,000 13,800,000                                                               
      interest income from bam surplus notes subsequent to deconsolidation
    -7,500,000                                                                
      deferred income tax expense
    1,700,000 7,400,000 -9,800,000 -48,800,000 -3,600,000 -9,200,000 18,100,000 -600,000 4,600,000 -1,400,000             -9,600,000 -300,000 7,500,000 5,300,000   -10,400,000 12,200,000 -2,900,000 900,000 21,700,000 34,300,000 -2,800,000 -17,600,000 25,800,000 18,500,000 5,600,000 26,300,000                         
      amortization of restricted share awards
    3,800,000 4,500,000 3,200,000 4,100,000 3,100,000 3,700,000 3,800,000 3,600,000 2,900,000                                                        
      amortization (accretion) and depreciation
    1,100,000 1,100,000 -2,100,000 -7,500,000 -2,400,000                                                            
      other operating items:
                                                                    
      net change in reinsurance recoverables
    -331,400,000 159,000,000 -253,000,000 96,400,000 24,700,000 14,800,000 -152,200,000 14,000,000 35,700,000 -15,700,000                                                       
      net change in insurance premiums, commissions and fees receivable
    -504,200,000 249,600,000 -394,900,000                                                              
      net change in deferred acquisition costs
    -114,500,000 31,100,000 -68,800,000  -82,200,000  40,000,000 -13,400,000 -71,600,000 -51,300,000 -1,800,000 -1,100,000 -700,000 -900,000 -900,000 -600,000 -1,400,000 -1,100,000 -700,000 -1,100,000 1,100,000 -3,500,000 2,700,000 4,300,000 -4,100,000 -2,200,000 3,200,000 20,000,000 -3,400,000 -20,200,000 -19,800,000 -1,200,000 -15,300,000 9,500,000 -4,900,000 8,000,000 4,500,000 -8,000,000       30,900,000 8,900,000 10,900,000 4,800,000        7,700,000         
      net change in loss and loss adjustment expense reserves
    133,100,000 -1,400,000 142,400,000 33,300,000 49,100,000 -32,900,000 307,300,000 22,500,000 104,900,000 56,000,000            2,900,000 2,600,000 -14,300,000 32,700,000 -46,200,000 -37,500,000 163,000,000 -40,400,000 -39,300,000 42,000,000 4,900,000 -44,600,000 -69,500,000 4,300,000 -13,200,000 -86,200,000 123,900,000   -209,300,000      -113,700,000 279,200,000                815,300,000 
      net change in unearned insurance premiums
    650,300,000 -284,100,000 499,400,000 -227,500,000 501,800,000 -146,500,000 -226,600,000 144,200,000 388,200,000 245,500,000 10,500,000 8,400,000 8,300,000 15,700,000 8,200,000 3,600,000 19,800,000 3,400,000 18,300,000 8,600,000 6,900,000 20,700,000 -16,500,000 54,100,000 -5,000,000 13,900,000 -58,700,000                                      
      net change in reinsurance payable
    236,300,000 -80,700,000 181,400,000 -65,200,000 -58,100,000 -61,600,000 -106,100,000 69,900,000 -75,200,000 -40,700,000                                                       
      net change in premiums and commissions payable
    -1,900,000 -5,600,000 12,500,000                                                              
      net change in accrued incentive compensation from other operations
    -51,100,000                                                                
      contributions to kudu’s participation contracts
    -68,000,000 -103,300,000  -55,500,000 -30,900,000                                                            
      net other operating activities
    -10,400,000 -21,600,000 -68,700,000 -47,200,000                                                             
      net cash provided from (used for) operations
    -40,200,000 64,100,000 36,500,000 24,500,000 85,600,000 208,100,000 117,000,000 81,400,000 -41,500,000          2,000,000 71,500,000                                       34,400,000      
      cash flows from investing activities:
                                                                    
      net change in short-term investments
    -52,200,000 -62,400,000 441,300,000 -300,900,000 47,600,000 280,300,000 -948,000,000 68,100,000 144,500,000 -103,100,000 429,000,000 -454,300,000 76,400,000 -85,400,000 86,200,000 -55,300,000 99,500,000 -587,500,000 610,500,000 -715,000,000 47,200,000 55,600,000 18,600,000 119,000,000 -157,300,000 -50,400,000 113,400,000 43,700,000 69,000,000 -86,100,000 -291,100,000 111,800,000 -61,500,000 44,700,000 -34,100,000 -2,100,000 26,300,000 -299,000,000   61,900,000 -50,100,000 33,200,000 129,500,000 233,800,000   12,100,000   142,500,000 89,800,000             
      sales of fixed maturity investments
    96,700,000 108,600,000 185,800,000 87,200,000 54,600,000 -23,700,000 59,000,000 66,900,000 86,500,000                                                1,715,400,000 1,331,700,000 1,177,800,000 1,053,700,000 1,266,800,000 1,077,900,000 1,439,700,000 1,931,500,000 
      maturities, calls and paydowns of fixed maturity investments
    109,700,000 93,200,000 81,800,000 53,900,000 66,800,000 91,200,000 31,700,000 36,600,000 39,000,000                                                213,300,000 333,200,000 220,500,000 168,100,000 222,100,000 223,200,000   
      sales of common equity securities and investment in mediaalpha
    120,700,000                                                               
      distributions and redemptions of other long-term investments
    21,900,000 25,800,000 91,500,000 90,100,000 2,000,000 60,400,000 8,500,000               16,500,000 9,100,000 9,700,000 7,100,000 3,000,000 28,100,000 500,000 49,700,000 6,400,000 18,200,000 3,000,000 23,900,000 21,500,000 13,300,000 2,400,000 20,900,000 900,000 8,900,000 11,100,000 60,700,000 12,100,000 23,900,000 54,000,000 106,700,000 18,900,000 -400,000 8,000,000 52,400,000                
      purchases of consolidated subsidiaries, net of cash acquired of 0.0 and 44.9
                                                                    
      purchases of fixed maturity investments
    -222,500,000 -335,500,000 -417,300,000 -199,800,000 -127,600,000 -111,400,000 -143,300,000 -215,800,000 -115,000,000                                                        
      purchases of other long-term investments
    -39,700,000 -32,000,000 -79,900,000 -27,500,000 -146,100,000 -41,900,000 -86,500,000 -29,000,000 -21,400,000 -101,000,000 -15,800,000 -18,700,000 -4,700,000 -3,900,000 -108,500,000 -60,600,000 -30,000,000 -46,000,000 -16,400,000 -12,600,000 -32,700,000 -22,400,000 -2,200,000 -24,000,000 -2,400,000 -10,900,000  2,800,000 -23,800,000 -9,500,000 -13,900,000 -4,700,000 -13,000,000  -9,800,000 -4,500,000 -17,400,000 -14,900,000                           
      net other investing activities
    -27,300,000 22,900,000 29,200,000 6,400,000 -11,200,000                                                            
      net cash provided from (used for) investing activities
    7,300,000 -163,200,000 100,600,000 -88,900,000 -96,600,000 -152,000,000 234,300,000 -106,600,000 139,800,000  36,600,000 -61,000,000                                        145,600,000 787,700,000 -18,000,000           
      cash flows from financing activities:
                                                                    
      draw down of debt and revolving lines of credit
    116,300,000 21,100,000  200,000                                                             
      repayment of debt and revolving lines of credit
    -1,000,000 -1,400,000 -32,600,000 -1,400,000                                                             
      cash dividends paid to common shareholders
    -2,600,000 -2,500,000 -2,600,000                                                            
      repurchases and retirements of common shares
    -9,900,000 200,000 -8,100,000                                                             
      bam member surplus contributions prior to deconsolidation
                                                                    
      contributions from other noncontrolling interests
    600,000                                                                
      distributions to other noncontrolling interests
    -41,100,000                                                                
      net other financing activities
    16,200,000 8,200,000  -200,000                                                             
      net cash provided from (used for) financing activities
    78,500,000 19,500,000 -34,200,000  -41,300,000  -487,600,000 220,600,000 -31,100,000 6,500,000   57,800,000 21,700,000                                           191,100,000 32,500,000       
      net change in cash during the period
    45,600,000  102,900,000                          26,500,000 -42,700,000 216,500,000 -13,200,000 -10,300,000 -9,900,000 49,500,000 64,100,000 10,400,000 -246,100,000                           
      cash balance at beginning of period
    266,400,000                                                                
      cash balance at end of period
    312,000,000                                                                
      supplemental cash flows information:
                                                                    
      interest paid
    -15,900,000  -16,700,000  -5,800,000  -4,600,000 2,100,000 -8,400,000 -7,500,000  -4,700,000  -4,400,000 -3,600,000 -3,700,000  -300,000  -100,000 -200,000 -200,000  -6,500,000 1,100,000 -1,600,000  12,900,000 -9,000,000 -12,800,000 -22,200,000 -6,300,000 -12,800,000  -12,700,000 -6,400,000 -12,900,000 -500,000 -8,100,000 -12,800,000  -14,800,000 -10,900,000 -12,800,000  -18,700,000 -17,700,000 -13,200,000  -14,900,000 -28,500,000 -14,800,000  -15,400,000 -24,600,000 -14,000,000 -21,800,000 -7,200,000  46,400,000 -21,600,000 -900,000  43,200,000 
      net income tax payments
    -3,500,000  -5,300,000  -17,800,000  600,000 -3,500,000 -300,000 -1,400,000                                                       
      millions
        2,023,000,000      2,019,000,000  2,018,000,000           2,015,000,000 2,014,000,000  2,013,000,000 2,012,000,000  2,011,000,000    2,010,000,000  2,009,000,000  2,008,000,000 2,007,000,000       
      fixed maturity investments, at fair value
    8,200,000 8,200,000                                                              
      short-term investments, at fair value
    9,300,000 9,300,000                                                              
      cash
    44,900,000 44,900,000   52,000,000 52,000,000                                                       
      premiums and commissions receivable
    38,000,000 38,000,000                                                              
      other assets
    7,700,000 7,700,000   88,900,000 88,900,000                                                       
      total tangible assets
    108,100,000 108,100,000                                                              
      loss and loss adjustment expense reserves
    -9,300,000 -9,300,000   -696,000,000 -696,000,000                                                       
      unearned insurance premiums
    -20,100,000 -20,100,000   -326,100,000 -326,100,000                                                       
      premiums and commissions payable
    -49,200,000 -49,200,000                                                              
      other liabilities
    -13,100,000 -13,100,000   -25,900,000 -25,900,000                                                       
      total tangible liabilities
    -91,700,000 -91,700,000                                                              
      net tangible assets acquired
    16,400,000 16,400,000   24,500,000 24,500,000                                                       
      goodwill
    270,400,000 270,400,000   116,800,000 116,800,000                                                       
      other intangible assets
    101,000,000 101,000,000                                                              
      total goodwill and other intangible assets
    371,400,000 371,400,000                                                              
      net assets acquired
    387,800,000 387,800,000   283,600,000 283,600,000                                                       
      interest income from bam surplus notes subsequent to deconsolidation, net of interest payments received of 5.8
                                                                    
      change in fair value of bam surplus notes
     15,300,000                                                               
      unrealized loss on deconsolidation of bam
                                                                   
      net (income) income from discontinued operation, net of tax - nsm group
                                                                   
      net (gain) income from sale of discontinued operations, net of tax - nsm group
                                                                    
      proceeds from kudu’s participation contracts sold
      600,000 62,900,000                                                            
      net cash provided from (used for) operations - continuing operations
       24,500,000 85,600,000 208,100,000 115,000,000                                                          
      net cash provided from
         2,000,000                                                          
      proceeds from the sale of nsm group and other operating businesses, net of cash sold of 0.0, 0.8 and 144.4
                                                                    
      purchases of consolidated subsidiaries, net of cash acquired of 44.9, 0.0, and 0.3
                                                                    
      release of cash (pre-funding) for ils funds managed by elementum
                                                                    
      purchases of common equity securities and investment in mediaalpha
                                                                   
      payments of principal received on the bam surplus notes subsequent to deconsolidation
                                                                    
      impact to cash from deconsolidation of bam
                                                                   
      net cash provided from (used for) investing activities - continuing operations
       -88,900,000 -96,600,000 -152,000,000 234,300,000                   139,800,000                                       
      net (contributions to) distributions from discontinued operations
                                                                    
      net cash provided from (used for) financing activities - continuing operations
       24,000,000 -41,300,000 -46,800,000 -487,000,000                                                          
      net change in cash during the period - continuing operations
       -40,400,000 -52,300,000 9,300,000 -137,700,000          -2,500,000 23,100,000 48,500,000 -4,700,000 -2,100,000 -25,700,000 -97,800,000 112,900,000 -29,700,000 -3,100,000 -9,700,000                                      
      cash balance at beginning of year
                                                                    
      cash balance at end of year (includes restricted cash balances of 73.6, 0.7 and 18.3 and excludes discontinued operations cash balances of 0.0, 0.0 and 0.0
                                                                    
      interest income from bam surplus notes
                                                                    
      proceeds from the sale of other operating businesses, net of cash sold of 0.0 and 0.8
                                                                    
      purchases of consolidated subsidiaries, net of cash acquired of 44.9 and 0.0
      -231,800,000                                                              
      bam member surplus contributions prior to the deconsolidation of bam
                                                                    
      net contributions from (distributions to) other noncontrolling interests
      1,100,000 2,300,000 -1,700,000                                                            
      cash balances at beginning of period
      122,400,000  255,000,000  -111,600,000 259,300,000 211,200,000   110,300,000  97,100,000  -69,600,000 149,800,000  -6,300,000 173,500,000  -111,500,000 349,500,000 326,700,000  212,600,000 251,900,000  -4,600,000 -39,800,000 148,100,000  148,900,000  183,900,000  -8,500,000 171,300,000 159,000,000  187,700,000  
      cash balances at end of period
      225,300,000  202,700,000  -137,700,000 56,300,000 327,100,000 488,500,000  3,500,000  -1,100,000 18,100,000 132,200,000  120,200,000  -4,700,000 -71,700,000 125,000,000  109,700,000 -35,400,000 170,400,000  -150,100,000 26,500,000 306,800,000 216,500,000 -13,200,000 316,400,000  49,500,000 64,100,000 223,000,000 -244,100,000 206,300,000 245,300,000  26,600,000 -17,100,000 154,900,000  -25,300,000 16,200,000 137,200,000  -79,200,000 -83,500,000 318,100,000  -9,500,000 -50,100,000 229,600,000 -13,400,000 186,300,000  18,700,000 8,500,000 183,100,000  1,400,000 
      bam member surplus contributions
      11,400,000 26,400,000 11,800,000                                                            
      fidus re premium payments
      -3,500,000 -3,300,000 -3,500,000                                                            
      net (gain) income from sale of discontinued operations, net of tax - sirius group
                                                                    
      net change in insurance premiums receivable
       169,400,000 -365,300,000 154,500,000 196,500,000 -135,200,000 -343,600,000 -199,700,000            2,700,000 35,200,000 -23,800,000 -8,500,000 -11,000,000 49,800,000                                      
      net change in deferred acquisition costs and value of in-force business acquired
                                                                    
      proceeds from the sale of nsm group and other operating businesses, net of cash sold of 0.8, 144.4 and 0.0
                                                                    
      release of cash pre-funded/placed in escrow for ark transaction
             646,300,000                                                       
      purchases of common equity securities
         -336,500,000 -49,900,000 -100,000 -38,000,000 -68,800,000 -100,000 -25,000,000 -100,000 -100,000 -4,600,000 -75,300,000 -109,400,000 -62,600,000 -136,700,000 -568,500,000 -113,400,000 -288,600,000 -108,300,000 -55,300,000 -86,100,000 -80,500,000 211,800,000 -491,700,000 -49,500,000 -39,400,000 -59,000,000 -65,000,000 -74,600,000 -105,700,000 -108,600,000 -143,300,000 -58,700,000                           
      purchases of consolidated subsidiaries, net of cash acquired of 0.0, 0.3, and 52.2
                                                                    
      issuances of shares to noncontrolling interests
                                                                    
      net cash provided from (used for) financing activities – continuing operations
                                                                    
      cash balance at end of year (includes restricted cash balances of 0.7, 18.3 and 4.5 and excludes discontinued operations cash balances of 0.0, 0.0 and 111.6
                                                                    
      investments
         594,300,000 594,300,000                                                       
      reinsurance recoverables
         433,400,000 433,400,000                                                       
      insurance premiums receivable
         236,700,000 236,700,000                                                       
      ceded unearned premiums
         170,200,000 170,200,000                                                       
      value of in-force business acquired
         71,700,000 71,700,000                                                       
      debt
         -46,400,000 -46,400,000                                                       
      ceded reinsurance payable
         -528,300,000 -528,300,000                                                       
      other intangible assets - syndicate underwriting capacity
         175,700,000 175,700,000                                                       
      deferred tax liability on other intangible assets
         -33,400,000 -33,400,000                                                       
      net change in restricted cash
        800,000 3,300,000 1,600,000 1,800,000 1,000,000 4,800,000 -4,500,000 -13,400,000 -10,700,000 -21,800,000 28,000,000 10,800,000 8,700,000      8,400,000 -2,600,000 11,000,000 4,100,000 8,100,000 -5,300,000 4,000,000 -5,600,000 33,900,000 18,300,000                               
      sales of common equity securities
             160,300,000 205,000,000 474,900,000 25,100,000 82,000,000 223,600,000 136,500,000 40,100,000 14,400,000 16,300,000 223,900,000 166,200,000 17,700,000 239,700,000 109,800,000 83,800,000 767,500,000 90,800,000 -206,000,000 496,600,000 80,000,000 217,100,000 64,200,000 63,400,000 108,600,000 64,300,000 166,300,000 181,900,000 40,900,000 36,600,000 22,200,000 112,400,000 40,500,000 24,200,000 60,700,000 60,200,000 15,700,000 80,000,000 15,900,000 7,700,000 4,900,000 104,500,000 192,600,000  118,200,000 110,900,000 138,400,000 131,900,000 136,100,000  305,400,000 189,500,000 62,800,000   
      proceeds from the sale of nsm group and other operating businesses, net of cash sold of 0.8 and 144.4
                                                                    
      purchases of consolidated subsidiaries, net of cash acquired of 0.0 and 0.3
                                                                    
      fixed maturity investments
        14,500,000      22,000,000 -300,000 24,400,000 -300,000 200,000 8,100,000  10,900,000                                               
      short-term investments
        9,700,000      1,000,000 3,700,000 1,300,000  2,600,000                                               
      common equity securities
        1,300,000      6,100,000 -1,700,000 11,000,000 -400,000 -2,500,000 5,400,000  5,000,000                                               
      other long-term investments
        14,100,000      -28,300,000 53,600,000 23,100,000 -1,800,000 7,200,000 1,600,000  1,900,000                                               
      amount attributable to tpc providers
                                                                    
      total investment income
        39,600,000      60,700,000 51,600,000 62,200,000 -2,500,000 4,900,000 16,400,000  20,400,000                                               
      third-party investment expenses
        -600,000      -900,000 -900,000 -100,000 100,000 -400,000  -700,000                                               
      net investment income, pre-tax
        39,000,000       51,600,000 61,300,000 -2,600,000 5,000,000 16,000,000  19,700,000                                               
      net change in other assets and liabilities
        -3,400,000 127,700,000 9,000,000 17,100,000 -63,400,000 -34,700,000 39,000,000 51,100,000 12,800,000 13,700,000 25,400,000 -33,200,000 -25,300,000 -41,300,000 700,000 16,600,000 25,900,000 -64,000,000 -75,800,000 -30,200,000 -88,900,000 -31,800,000 4,500,000 81,500,000 9,400,000 -55,300,000 163,500,000 66,600,000 -77,000,000 -25,400,000 -1,300,000 114,600,000 -24,700,000 14,400,000 18,200,000 35,800,000  109,400,000       -145,600,000   24,200,000       36,800,000      
      proceeds from the sale of other businesses, net of cash sold of 0.8 and 0.0
        17,300,000                                                            
      draw down of debt and revolving line of credit
          8,800,000 188,000,000 15,000,000 105,300,000  57,000,000 42,900,000 106,500,000 33,200,000  15,000,000 350,000,000   250,000,000 -4,500,000 107,000,000 61,500,000 114,500,000 15,000,000 4,500,000                                   
      repayment of debt and revolving line of credit
        -20,000,000  -8,100,000 12,400,000 -14,800,000 -93,700,000  -1,600,000 -700,000 -500,000 -6,900,000 -14,800,000 -4,200,000 -2,300,000 -400,000 -351,300,000 -12,100,000 -1,200,000 -2,800,000 -251,300,000 -135,400,000 -15,100,000 -2,700,000 -75,300,000 -16,300,000 -1,300,000                                   
      common shares repurchased
        -25,300,000  -508,900,000 -66,800,000 -34,800,000      -7,200,000     -20,300,000 -319,500,000 -374,600,000 -166,900,000 -100,000,000 -151,500,000 -12,800,000 -4,300,000 -74,900,000 -14,800,000 -10,900,000 -800,000 -79,000,000 -26,500,000                           
      amortization and depreciation
         -2,700,000 -1,400,000 -7,600,000 16,000,000 12,800,000 16,200,000 9,800,000 10,000,000 7,800,000 3,700,000 8,300,000 7,300,000 4,800,000 -3,500,000 6,700,000 4,600,000 14,600,000 29,800,000 12,200,000 5,100,000 17,400,000 20,700,000 1,800,000 22,800,000 22,200,000                                   
      net change in ceded unearned premiums
         500,000 45,700,000 -18,600,000 -19,700,000 24,800,000            -8,200,000  -600,000 1,800,000 -6,800,000  59,200,000 -21,100,000 -61,500,000 14,300,000 11,000,000 -60,600,000  23,900,000 -2,100,000 -52,400,000 27,800,000    28,500,000 46,200,000 1,800,000                     
      proceeds from kudu participation contracts sold
                                                                    
      contributions to kudu participation contracts
                                                                    
      proceeds from the sale of nsm group, net of cash sold of 143.9, 0.0 and 0.0
                                                                    
      proceeds from the sale of other operating businesses, net of cash sold of 0.5 0.0 and 0.0
                                                                    
      cash pre-funded for ils funds managed by elementum
                                                                    
      purchases of consolidated subsidiaries, net of cash acquired of 0.3, 52.2, and 1.5
                                                                    
      issuances of shares to non-controlling interests
                                                                    
      bam member surplus contribution
                                                                    
      net contributions from (distributions to) other non-controlling interests
                                                                    
      other financing activities
         500,000 -300,000 2,400,000 -4,200,000 -4,600,000 300,000       -100,000 -1,600,000 -7,600,000                                           
      cash balance at end of year (includes restricted cash balances of 12.2, 4.5 and 0.0 and excludes discontinued operations cash balances of 0.0, 111.6 and 126.6
                                                                    
      net (gain) income from sale of discontinued operations, net of tax - nsm group and sirius group
                                                                    
      investments in kudu participation contracts
          -45,100,000   -11,000,000  -100,000                                                     
      proceeds from the sale of nsm group, net of cash sold of 143.9 and 0.0
                                                                    
      proceeds from the sale of other operations, net of cash sold of 0.5 and 0.0
                                                                    
      purchases of consolidated subsidiaries, net of cash acquired of 0.3 and 52.2
                                                                   
      other investing activities
          -2,000,000 1,300,000 4,400,000 60,900,000 41,600,000 -26,700,000 -14,400,000 82,900,000 -78,400,000 -17,400,000 -38,000,000                                                
      cash dividends paid to the company’s common shareholders
          -3,000,000 -3,100,000 -3,200,000 -3,800,000 -4,600,000 -5,400,000 -6,000,000 -6,200,000 -6,200,000                           
      net distributions from non-controlling interest shareholders
          -2,700,000                                                          
      contributions from discontinued operations
                      15,100,000                                             
      capital contributions from bam members
          26,000,000 24,000,000 12,300,000 13,800,000 22,000,000 15,400,000 11,700,000 23,000,000 12,000,000 7,900,000 26,900,000 4,900,000 11,700,000 8,400,000 7,700,000 9,600,000 9,800,000 11,500,000 10,000,000 6,700,000 8,900,000 8,800,000 6,900,000 4,600,000 3,900,000 2,900,000 4,800,000 5,600,000 3,500,000                              
      acquisition of subsidiary shares by non-controlling interest shareholders
                                                                   
      fidus re premium payment
          -1,800,000 -1,900,000 -1,900,000 -3,200,000  -700,000 -800,000 -700,000 -800,000 -700,000 -700,000                                                
      net (income) income from nsm group discontinued operation, net of tax
                                                                    
      net (gain) income from sale of sirius group, net of tax
                                                                    
      proceeds from the sale of consolidated subsidiaries, net of cash sold of 0.0 and 0.0
                                                                    
      net (gain) income from sale of discontinued operations, net of tax
                800,000     -100,000                                               
      net change in premiums and commissions receivable
            -12,600,000  -9,100,000 9,000,000                                                     
      net change in premiums payable
            10,100,000 2,600,000 -3,500,000 -22,800,000                                                     
      distributions and redemptions of other long-term investments and settlements of forward contracts
            39,800,000 40,100,000 5,400,000 400,000  24,900,000 1,900,000 1,900,000  -6,900,000                                               
      purchases of consolidated subsidiaries, net of cash acquired of — and 52.0
                                                                    
      net contributions from non-controlling interest shareholders
            300,000                                                        
      contingent consideration payments related to acquisitions of subsidiaries
             -6,700,000                                                       
      effect of exchange rate changes on cash
            600,000 -300,000 -2,600,000 900,000 1,400,000 -600,000 -500,000 300,000            6,400,000 -8,500,000 -13,800,000 3,400,000 -200,000 -1,200,000 3,700,000 -2,100,000 -600,000 3,800,000 -2,500,000 1,700,000   100,000 2,300,000 2,100,000    3,300,000     700,000 3,100,000   2,600,000 600,000 3,400,000 1,800,000   
      net change in cash during the period - continuing operations, including the effect of exchange rate changes
            67,800,000 277,300,000 -3,600,000 3,500,000  -1,100,000 18,100,000 21,900,000                                                 
      adjustments to reconcile net income to net cash from operations:
                                                                    
      net realized and unrealized investment (gains) losses from mediaalpha
                                                                    
      realized (gain) income from the 2019 mediaalpha transaction
                                                                    
      net change in commissions receivable
             -200,000                                                       
      net change in investments in kudu participation contracts
                                                                    
      purchases of fixed maturity and convertible investments
             -411,100,000 -126,400,000 -117,900,000 -111,200,000 -130,600,000 -145,100,000 -152,300,000 -137,100,000 -537,100,000 -1,175,400,000 -412,500,000 180,300,000 -957,600,000 -1,367,900,000 -968,000,000 -3,151,800,000 -315,200,000                                       
      purchases of consolidated subsidiaries, net of cash acquired of 52.2, 13.4, and 12.8 and including restricted cash of 0.0, 8.4, 0.0
                                                                    
      acquisition of subsidiary shares from non-controlling interest shareholders
                                                                    
      proceeds from issuance of shares to non-controlling interest shareholders
                62,700,000                                                 
      contingent considerations related to acquisition of subsidiaries
                                                                    
      cash balance at end of year
                                                                    
      net realized and unrealized investment losses (gains) from investment in mediaalpha
             41,700,000                                                       
      net gain from sale of discontinued operations, net of tax
             -18,700,000 1,500,000 700,000   -700,000    -554,300,000                                             
      amortization of restricted share and option awards
             4,000,000  3,500,000 2,200,000 2,900,000 2,600,000 2,800,000 3,300,000 3,200,000                                               
      net cash from operations
             -92,800,000            -56,100,000   -94,800,000 -92,400,000   22,000,000 -57,700,000  4,800,000 -47,200,000 -30,200,000 193,600,000 -39,500,000 -224,900,000                            
      sales of fixed maturity and convertible investments
             97,800,000  49,000,000 41,700,000 51,100,000 148,500,000 93,000,000 80,000,000 1,266,500,000 493,200,000 431,500,000 331,200,000 868,500,000 995,300,000 979,900,000 1,251,200,000 202,300,000                                       
      maturities, calls and paydowns of fixed maturity and convertible investments
             31,400,000  41,500,000 26,600,000 31,200,000 35,900,000 25,600,000 16,600,000 40,600,000 34,800,000 64,800,000 -62,000,000 175,800,000 196,600,000 213,800,000 160,600,000 155,900,000                                       
      purchases of consolidated subsidiaries, net of cash acquired of 52.0 and 0.0
             11,100,000                                                       
      net cash (used for) provided from investing activities
             363,900,000   600,000 52,100,000                                                   
      distribution to non-controlling interest shareholders
             -900,000   -100,000 -27,600,000    -400,000 4,600,000 -5,100,000  -300,000    -8,100,000 -300,000 -700,000                                   
      capital contributions to non-controlling interest shareholders
             -400,000   900,000 700,000                                                 
      net realized and unrealized investment gains from mediaalpha
                                                                    
      realized gain from the 2019 mediaalpha transaction
                                                                    
      deferred income tax (benefit) expense
                         -1,100,000                                           
      investments in asset management firms - kudu
                -44,000,000                                                    
      purchases of consolidated subsidiaries, net of cash acquired of 13.4, 12.8, and 90.9 and including restricted cash of 8.4, 0.0, 53.4
                                                                    
      cash pre-funded/placed in escrow for ark transaction
                                                                    
      acquisitions of additional shares from non-controlling interest
                                                                    
      repurchase of shares from non-controlling interest shareholders
                -21,100,000                                                 
      capital contributions from non-controlling interest shareholders
                                                                    
      distributions to non-controlling interest shareholders
                                                                    
      payments to contingent considerations related to purchases of consolidated subsidiaries
                                                                    
      investment in mediaalpha
                                                                    
      net investment income
                                                                    
      net realized and unrealized investment gains
                       -32,500,000     -28,100,000 -29,500,000   61,100,000 -103,400,000 -20,800,000 -113,900,000 -63,800,000 -95,600,000 -28,200,000 37,300,000 -75,200,000 -72,700,000                           
      realized gain from the mediaalpha transaction
                -1,300,000 -66,200,000                                                 
      purchases of consolidated subsidiaries, net of cash acquired of 13.4 and 12.8
                                                                    
      payments on contingent consideration earnout liabilities
               -600,000                                                     
      net cash provided from financing activities
               12,500,000                                        23,000,000    341,100,000         
      net realized and unrealized investment losses
                     53,700,000                                  23,300,000             
      net cash (used for) provided from operations
                   -41,100,000 -600,000      -13,000,000                                          
      purchases of consolidated subsidiaries, net of cash acquired of 11.9 and 12.8
                                                                    
      net income tax refunds
                 -100,000    200,000                                               
      charges (credits) to reconcile net income to net cash provided from (used for) operations:
                                                                    
      net income from discontinued operations
                      15,200,000       -7,300,000 -65,700,000 -15,500,000 7,900,000 -6,700,000       24,600,000                           
      net cash from continuing operations
                                                                    
      net cash provided from discontinued operations
                                                                    
      sales of unconsolidated affiliates and consolidated subsidiaries, net of cash sold
                         -11,000,000                                          
      net settlement of investment cash flows and contributions with discontinued operations
                     100,000    -5,400,000                                          
      purchases of consolidated subsidiaries, net of cash acquired of 12.8, 90.9, and 0.0 and including restricted cash of 0.0, 53.4, 0.0
                                                                    
      net cash (used for) provided from investing activities — continuing operations
                                                                    
      net cash provided from investing activities — discontinued operations
                                                                    
      distributions from discontinued operations
                                                                    
      net cash provided from (used for) financing activities — continuing operations
                                                                    
      net cash from financing activities — discontinued operations
                                                                    
      add: cash held for sale at the beginning of period
                         900,000                                          
      deferred income expense
                 7,400,000 -3,500,000 7,500,000                                                 
      purchases of consolidated subsidiaries, net of cash acquired of 12.8 and 71.6
                                                                   
      payments on contingent consideration earnout liability
                                                                   
      acquisition of additional subsidiary shares from non-controlling interest
                                                                    
      restricted share statutory withholding tax payments
                 -4,900,000  -8,400,000                                               
      net cash provided from operations - discontinued operations
                                             8,000,000                       
      net cash (used for) provided from investing activities - continuing operations
                                                                    
      net cash from investing activities - discontinued operations
                                                                    
      net cash from financing activities - discontinued operations
                       -19,900,000                                             
      net cash from operations - continuing operations
                   -41,100,000  -44,800,000  1,800,000 -10,100,000 -56,100,000   -102,400,000 -41,700,000   22,600,000 -65,600,000  20,900,000 -32,600,000   -7,400,000 -184,200,000                            
      purchases of consolidated subsidiaries, net of cash acquired of 0.4
                   -9,600,000                                                 
      net cash provided from investing activities - continuing operations
                   -42,800,000  77,500,000  687,100,000 -31,700,000 39,300,000  409,600,000    -47,800,000 29,300,000 43,700,000 147,700,000 -5,400,000 43,600,000  -166,400,000 81,600,000 362,200,000 -521,200,000 178,300,000 814,900,000  8,900,000                       
      net cash provided from investing activities
                   -42,800,000 -49,200,000 77,400,000 20,800,000   39,300,000 -65,400,000 393,300,000 774,100,000 174,800,000 -49,600,000 -4,800,000 29,900,000 35,800,000 144,600,000 10,700,000 58,200,000 30,900,000 -145,700,000 113,700,000 402,900,000 -365,600,000 178,300,000 814,900,000 140,500,000 174,700,000 251,300,000 233,100,000 2,400,000 159,000,000 186,800,000 137,100,000 10,800,000 -27,900,000        137,000,000  -128,500,000 -11,800,000 168,300,000 246,600,000 -205,400,000 
      net cash from financing activities - continuing operations
                   105,500,000  -9,600,000    -8,900,000  -314,700,000 -506,800,000 -101,200,000  -116,500,000 -31,800,000 -12,300,000 -80,000,000 -32,100,000 -21,100,000  -2,100,000 -8,000,000 -167,000,000 -31,500,000                           
      net cash from financing activities
                   105,500,000 47,900,000 -9,600,000 25,700,000 -713,500,000 -2,300,000 -8,900,000 -19,500,000 -323,900,000 -500,200,000 -98,800,000 -51,600,000 -118,900,000 -31,800,000 -12,300,000 -80,000,000 -32,100,000 -21,100,000 -9,400,000 -2,100,000 -8,000,000 -167,000,000 -31,500,000                           
      deferred income tax benefit
                                                                    
      net gain on sale of discontinued operations
                           -47,900,000                                         
      proceeds paid to non-controlling common shareholders from the sale of consolidated subsidiaries
                                                                   
      purchases of consolidated subsidiaries, net of cash acquired of 90.9, including 53.4 of restricted cash
                                                                    
      net change in unsettled investment purchases and sales
                     42,900,000  -55,500,000 -79,100,000 -1,000,000 142,800,000 -197,400,000 46,000,000 44,300,000 -76,400,000 -16,600,000 -46,800,000 135,200,000 86,700,000 -110,400,000 52,600,000 25,300,000 -52,100,000 115,100,000 -80,800,000 -87,900,000 -128,700,000 67,100,000 -7,000,000 15,500,000 -28,200,000 66,700,000     -31,700,000 -40,900,000 56,200,000 68,600,000 -61,100,000 -45,900,000 -34,800,000 225,800,000     -80,000,000 98,400,000 -114,200,000 59,700,000 
      net cash provided from investing activities — continuing operations
                                                                    
      proceeds from issuances of common shares
                                          -100,000   -100,000   700,000       1,600,000 200,000 500,000 100,000 800,000 
      net cash from financing activities — continuing operations
                                                                    
      less: cash held for sale at the end of period
                          -2,900,000                                          
      gain from sale of tranzact reported in discontinued operations
                      51,900,000                                           
      add back reclassification from continuing operations for the release of a tax valuation allowance
                      30,200,000                                           
      increase to white mountains’s book value from sale of tranzact
                                                                  
      charges (credits) to reconcile net income to net cash from operations:
                                                                    
      deferred income benefit
                     -800,000  -2,100,000                                             
      net cash (used for) provided from operations - discontinued operations
                                                                    
      purchases of consolidated subsidiaries, net of cash acquired of 71.9
                                                                    
      net cash provided from investing activities - discontinued operations
                           -16,300,000       -3,100,000 16,100,000 14,600,000  20,700,000 32,100,000 40,700,000                            
      add: cash held for sale, excluding discontinued operations, at the beginning of period
                                                                   
      less: cash held for sale, excluding discontinued operations, at the end of period
                                                                    
      investment income:
                                                                    
      net cash provided from (used for) operations - discontinued operations
                     100,000           -600,000 7,900,000                                   
      net cash provided from used for operations
                     -44,700,000                                               
      net acquisitions of property and equipment
                     -100,000  1,100,000 300,000 -400,000  500,000 -1,000,000 -2,700,000    -5,000,000 -4,600,000 -3,400,000 -500,000 -2,700,000 -4,200,000 -2,700,000 -3,500,000 -700,000                           
      net cash (used for) provided from investing activities - discontinued operations
                     -100,000        35,000,000   600,000 -7,900,000                                   
      net gain on sale of unconsolidated affiliates
                                                                    
      undistributed equity in earnings from unconsolidated affiliates, after-tax
                                                                    
      purchases of consolidated affiliates and other assets
                                                                    
      distributions, settlements and redemptions of other long-term investments
                       -600,000                                             
      purchases of unconsolidated affiliates and consolidated subsidiaries, net of cash acquired
                                                                    
      payments of contingent consideration related to purchases of consolidated subsidiaries
                           -7,800,000                                       
      net income tax refund from national governments
                                                                   
      net income on sale of discontinued operations
                         1,000,000                                           
      net change in reinsurance recoverable on paid and unpaid losses
                         1,400,000 6,600,000 -2,400,000 -16,500,000 26,500,000 43,200,000 -99,300,000 16,000,000 20,000,000 -30,500,000 -11,700,000 13,900,000 9,500,000 -20,500,000 15,900,000 20,100,000 -28,800,000 86,700,000 40,200,000   97,800,000 84,400,000 104,100,000    45,900,000 8,300,000 193,300,000 39,700,000 40,100,000 32,100,000 93,600,000 76,700,000 257,600,000 167,000,000 218,700,000 178,800,000 192,900,000 147,800,000   
      net change in funds held under insurance treaties
                         -4,300,000  15,200,000 6,000,000 -2,800,000                                       
      net cash from operations - discontinued operations
                            7,600,000 -50,700,000     3,100,000 -16,100,000 -14,600,000  -20,700,000 -32,100,000 -40,700,000                            
      onebeacon ltd. common shares repurchased and retired
                          -11,500,000 -1,900,000 -200,000 100,000 -1,700,000                                   
      contributions to discontinued operations
                           -3,000,000                                       
      increase to white mountains book value from sale of tranzact
                         82,100,000                                           
      charges (credits) to reconcile net income to net cash (used for) provided from operations:
                                                                    
      net gain on sale of consolidated and unconsolidated affiliates
                                                                    
      net income (income) from discontinued operations
                            6,000,000 900,000       500,000                                
      net (gain) loss on sale of discontinued operations
                                                                    
      net change in ceded unearned insurance premiums
                                                                    
      net change in funds held under insurance contracts
                                                                    
      net cash (used for) provided from continuing operations
                                                                    
      net cash (used for) provided from discontinued operations
                                                                    
      purchases of consolidated and unconsolidated affiliates
                                                                    
      net (acquisitions) dispositions of property and equipment
                                                                    
      net cash provided from (used for) investing activities — continuing operations
                                                                    
      change in capital lease obligation
                                                                    
      (contributions to) distributions from discontinued operations
                                                                    
      capital contributions from non-controlling interest of consolidated lps
                                                                  
      redemptions paid to non-controlling interest of consolidated lps
                                                                  
      f-4
                                                                    
      net gain on sale of unconsolidated affiliates and consolidated subsidiaries
                                                                    
      undistributed equity in earnings from unconsolidated affiliates, net of tax
                               -3,900,000 -6,800,000 -7,300,000 -7,000,000 -12,500,000 -13,800,000  -8,600,000 -7,100,000 -9,200,000 -7,700,000                           
      net change in funds held by ceding entities
                               45,600,000 -34,500,000 21,400,000                                   
      net change in ceded reinsurance payable
                           4,000,000 -8,100,000 1,300,000  -79,300,000 35,500,000 56,400,000 -16,100,000 1,400,000 78,600,000  -17,600,000 -4,900,000 75,700,000 -11,700,000 -11,300,000 54,500,000      6,000,000 55,900,000 137,000,000                 
      net cash (used for) provided from operations - continuing operations
                                                                    
      payments on capital lease obligation
                           -400,000 -500,000 -500,000  -700,000 -1,500,000 -1,300,000 -1,400,000 -1,300,000 -1,300,000  -1,300,000 -900,000 -1,800,000                            
      cash dividends paid to onebeacon ltd.’s non-controlling common shareholders
                           -4,700,000 -4,800,000 -4,700,000 -4,900,000 -4,900,000 -5,000,000 -4,900,000 -4,900,000 -5,000,000 -4,900,000 -5,000,000 -5,000,000 -4,900,000 -5,000,000                            
      acquisition of additional shares from non-controlling interest
                                                                   
      net cash (used for) provided from financing activities - discontinued operations
                                                                    
      net gain on sale of unconsolidated subsidiaries
                                                                    
      sales of consolidated and unconsolidated subsidiaries, net of cash sold
                                                                    
      net settlement of investment cash flows with discontinued operations
                                                                    
      purchases of consolidated and unconsolidated subsidiaries, net of cash acquired
                            -8,100,000                                       
      net cash provided from (used for) financing activities - discontinued operations
                                                                    
      cash held for sale at the beginning of period
                                                                    
      cash held for sale at the end of period
                                                                    
      scope
                                                                    
      united states first event
                            75,000,000                                       
      united states second event
                            45,000,000                                       
      japan first event
                            25,000,000                                       
      net change in variable annuity benefit guarantee liabilities
                             -400,000 1,300,000 -2,800,000 1,500,000 -400,000 -20,100,000 -22,300,000 1,300,000 -90,900,000 -50,400,000 -57,500,000 -189,900,000 10,600,000                           
      net change in variable annuity benefit guarantee derivative instruments
                             7,000,000  -1,200,000 11,200,000 9,400,000 9,500,000 14,800,000 -20,400,000  49,800,000                              
      funding from operational cash flows for discontinued operations
                                                                    
      transfer of proceeds from symetra sale to sirius group
                             -559,800,000                                       
      net cash provided from financing activities - discontinued operations
                             2,400,000                                       
      net income tax refund from (payment to) national governments
                             13,500,000                                       
      net (gain) loss on sale of other discontinued operations
                                                                    
      net change in ceded reinsurance premiums payable
                                                                    
      net change in variable annuity benefit derivative instruments
                                        22,500,000 88,400,000                           
      net cash provided from (used for) continuing operations
                                                                    
      net cash provided from (used for) discontinued operations
                                                                    
      sales of unconsolidated affiliates, net of cash sold and held in escrow
                                                                    
      contributions to other long-term investments
                                                                    
      funding of operational cash flows for discontinued operations
                                  3,100,000 -16,100,000 -14,600,000 21,200,000 -20,700,000 -32,100,000 -40,700,000                            
      net dispositions (acquisitions) of property and equipment
                              -4,500,000 -15,000,000                                     
      distributions from (contributions to) discontinued operations
                              -3,000,000                                      
      distribution to non-controlling interest shareholders of tranzact and mediaalpha
                                                                    
      net cash (used for) provided from financing activities — discontinued operations
                                                                    
      gain on sale of subsidiaries - hamer and essentia
                                                                    
      net cash provided from operations - continuing operations
                                                                    
      net cash provided from operations
                                                        -46,100,000            
      sales of fixed maturity and convertible fixed maturity investments
                               -1,211,200,000 965,400,000 1,110,800,000 1,313,500,000 1,314,600,000 1,026,300,000 528,900,000 711,500,000 676,500,000 1,962,900,000 1,679,200,000 789,400,000 2,450,200,000 576,200,000 794,800,000 982,600,000 1,128,300,000 1,045,800,000 671,700,000 718,100,000 442,400,000 481,000,000 666,500,000 409,100,000 834,000,000 333,000,000 1,065,200,000 741,000,000 1,527,200,000         
      maturities, calls and paydowns of fixed maturity and convertible fixed maturity investments
                               -6,600,000 117,900,000 138,200,000 90,700,000 87,900,000 189,700,000 85,800,000 69,700,000 134,000,000 176,300,000 112,100,000 101,700,000 194,900,000 148,300,000 189,600,000 343,100,000 482,600,000 346,500,000 314,800,000 326,200,000 846,600,000 350,300,000 312,500,000 336,800,000 249,500,000 213,300,000 219,600,000 626,500,000 359,400,000         
      sales of consolidated and unconsolidated affiliates, net of cash sold
                                 12,800,000  31,300,000                7,400,000 4,200,000         
      funding from (of) operational cash flows for discontinued operations
                               10,200,000 -600,000 7,900,000                                   
      purchases of fixed maturity and convertible fixed maturity investments
                               1,169,500,000 -1,187,400,000 -1,282,300,000 -1,232,600,000 -1,393,300,000 -1,138,300,000 -728,200,000 -798,600,000 -862,700,000 -1,742,500,000 -1,747,300,000                           
      purchases of consolidated and unconsolidated affiliates, net of cash acquired
                               -30,900,000 -2,400,000 -32,200,000  -9,200,000                            
      gain on sale of subsidiary - hamer and citation
                                                                    
      net change in unearned insurance and reinsurance premiums
                                -10,900,000 181,300,000 41,800,000 -26,700,000 217,700,000 -103,700,000 -21,100,000 -33,800,000 146,100,000 -18,300,000 10,000,000 214,900,000  11,900,000 -77,600,000 152,100,000  -87,600,000 -48,700,000 204,100,000  -90,900,000 -58,200,000 149,800,000 -103,100,000 43,900,000 9,900,000 109,200,000 -17,600,000 167,300,000  37,800,000 -25,800,000 156,200,000   
      net change in funds held under reinsurance treaties
                                9,800,000 15,000,000 -3,900,000 700,000 54,000,000 11,700,000 9,400,000 23,700,000 -3,100,000 3,700,000 1,300,000        6,400,000                 
      net change in insurance and reinsurance premiums receivable
                                12,700,000 -190,500,000 -1,900,000 16,800,000 -212,400,000 156,500,000 47,900,000 -12,000,000 -179,700,000 56,300,000                     95,100,000      
      cash dividends paid on sig preference shares
                                    -9,400,000                             
      collateral provided by interest rate cap counterparties
                                600,000 -1,200,000 -900,000 -1,900,000 -2,600,000 1,100,000                               
      net income tax (payment to) refund from national governments
                                                                    
      gross beginning balance
                                -124,800,000 3,159,800,000 4,900,000 -30,900,000 3,079,300,000  -42,700,000 -68,300,000 3,168,900,000 -181,000,000 -191,500,000 5,702,300,000  -117,400,000 -427,400,000 6,187,200,000    6,802,100,000  -260,300,000 -140,000,000 7,400,100,000  -91,600,000 -24,100,000 8,062,100,000 -141,200,000 8,777,200,000       
      less beginning reinsurance recoverable on unpaid losses
                                47,000,000 -483,900,000 -8,000,000 2,900,000 -428,100,000  22,200,000 18,300,000 -429,100,000 96,000,000                           
      net income and lae reserves
                                -77,800,000 2,675,900,000 -3,100,000 -28,000,000 2,651,200,000  -20,500,000 -50,000,000 2,739,800,000 -85,000,000 -149,600,000 3,195,000,000  -6,200,000 -354,500,000 3,810,100,000    4,011,200,000  -100,600,000 -74,300,000 4,349,700,000  -43,900,000 68,500,000 4,594,200,000 800,000 4,761,500,000       
      loss and lae reserves consolidated — ssie
                                    13,600,000                                
      loss and lae incurred relating to:
                                                                    
      current year losses
                                33,200,000 266,800,000 22,800,000 37,900,000 240,500,000  -100,000 47,100,000 242,900,000 49,800,000 10,500,000 257,900,000  5,100,000 -247,500,000 550,200,000    719,500,000  40,900,000 -17,300,000 563,900,000  130,800,000 -34,900,000 618,300,000 -2,300,000 630,100,000       
      prior year losses
                                -10,300,000 -1,400,000 -16,400,000 15,500,000 -11,200,000  3,800,000 -16,800,000 1,400,000 -6,700,000 -8,200,000 4,800,000               28,900,000 20,400,000         
      total incurred losses and lae
                                22,900,000 265,400,000 6,400,000 53,400,000 229,300,000  3,700,000 30,300,000 244,300,000 43,100,000 2,300,000 262,700,000  -15,300,000 -234,100,000 526,500,000    703,200,000  15,200,000 -14,300,000 543,200,000  64,900,000 -6,000,000 638,700,000         
      foreign currency translation adjustment to loss and lae reserves
                                29,900,000 -22,400,000 -23,000,000 -2,300,000 1,800,000  16,900,000 5,000,000 -9,600,000 24,100,000 -23,900,000 11,800,000   -11,000,000 21,100,000      -3,900,000      25,900,000 -200,000 3,700,000       
      loss and lae paid relating to:
                                                                    
      total loss and lae payments
                                31,200,000 -320,800,000 -8,100,000 -12,600,000 -272,900,000  22,600,000 16,600,000 -307,200,000 56,500,000                           
      net ending balance
                                6,200,000 2,598,100,000 -27,900,000 -3,100,000 2,623,200,000  22,800,000 -20,500,000 2,689,800,000 -257,400,000 -85,000,000 3,045,400,000  -148,500,000 -424,400,000 3,873,700,000    4,171,400,000  -55,300,000 -100,600,000 4,275,400,000  52,600,000 -43,900,000 4,662,700,000 -90,800,000 4,762,300,000       
      plus ending reinsurance recoverable on unpaid losses
                                -9,400,000 436,900,000 -2,500,000 8,000,000 425,200,000  27,400,000 -22,200,000 410,800,000 -2,012,600,000 -96,000,000 2,465,400,000  388,100,000 -145,500,000 2,338,600,000    2,919,600,000  9,100,000 -159,700,000 2,984,700,000  -62,200,000 -47,700,000 3,375,300,000 -180,500,000 3,873,700,000       
      gross ending balance
                                -3,200,000 3,035,000,000 -30,400,000 4,900,000 3,048,400,000  50,200,000 -42,700,000 3,100,600,000 -2,270,000,000 -181,000,000 5,510,800,000  239,600,000 -569,900,000 6,212,300,000    7,091,000,000  -46,200,000 -260,300,000 7,260,100,000  -9,600,000 -91,600,000 8,038,000,000 -271,300,000 8,636,000,000       
      gain on sale of subsidiary - citation
                                                                    
      net income tax (payment) refund to national governments
                                 -15,000,000                                   
      gain on sale of subsidiary - citation and essentia
                                  -700,000                                
      excess of fair value of acquired net assets over cost - ashmere
                                                                    
      draw down of revolving line of credit
                                     50,000,000 20,000,000 50,000,000 80,000,000                            
      repayment of revolving line of credit
                                  -40,000,000   -50,000,000 -20,000,000 -50,000,000 -155,000,000                            
      purchase of interest rate cap
                                                                   
      net income tax refund (payment) to national governments
                                  6,200,000 -2,200,000 3,800,000                                
      loss and lae reserves acquired
                                                                    
      accretion of fair value adjustment to loss and lae reserves
                                  -100,000 200,000  100,000 -1,100,000 1,200,000 -100,000 -5,900,000 7,100,000  2,100,000    2,100,000  900,000 100,000 2,500,000  200,000 -100,000 4,200,000 300,000 5,100,000       
      net change in funds held by ceding companies
                                   4,700,000 12,600,000 -21,600,000 1,000,000 9,800,000 25,200,000 7,200,000      22,000,000 1,900,000   16,900,000 -3,500,000 38,900,000 19,000,000 6,000,000  -15,100,000 9,400,000 16,100,000 73,700,000 11,900,000  94,700,000 7,800,000 55,000,000   
      excess of fair value of acquired net assets over cost - american fuji
                                      -6,900,000                            
      net (gain) loss on sale of consolidated and unconsolidated affiliates
                                                                    
      excess of fair value of acquired net assets over cost
                                                                    
      undistributed equity in (earnings) income from unconsolidated affiliates, after-tax
                                                                    
      net change in ceded unearned insurance and reinsurance premiums
                                                                    
      net cash from discontinued operations
                                                                    
      repurchase of debt
                                                                    
      issuance of debt, net of debt issuance costs
                                                                    
      net change in cash from discontinued operations
                                                                    
      cash reclassified to assets held for sale
                                                                    
      see notes to consolidated financial statements.
                                                                    
      net (income) income from discontinued operations
                                        -500,000                            
      net income on sale of discontinued operation
                                                                    
      gain on sale of subsidiary - essentia
                                      -23,000,000                            
      cash reclassified from assets held for sale
                                         2,000,000                         
      net income tax payments to national governments
                                      6,900,000 -6,200,000 -2,200,000 6,900,000 -4,700,000 -8,700,000  18,900,000 -14,500,000 -10,800,000                     
      less: beginning net income and lae reserves for onebeacon’s runoff business
                                                                    
      loss and lae reserves acquired - american fuji
                                        21,300,000                            
      net (gain) income from discontinued operations
                                                                    
      less: beginning net income and lae reserves for onebeacon's runoff business
                                                                    
      plus: ending net income and lae reserves for onebeacon's runoff business
                                                                    
      sale of unconsolidated affiliates
                                                                    
      cash dividends paid to onebeacon ltd.’s noncontrolling common shareholders
                                         -5,000,000                           
      less: beginning net income and lae reserves for autoone and onebeacon's runoff business
                                                                    
      plus: ending net income and lae reserves for autoone and onebeacon's runoff business
                                                                    
      loss and lae reserve balances for onebeacon's run-off business prior to september 30, 2012 and autoone prior to september 30, 2011 were not classified as held for sale. adjustment is to present loss and lae reserve activities from continuing operations.
                                                                    
      less: beginning net income and lae reserves for autoone
                                                                    
      plus: ending net income and lae reserves for autoone
                                                                    
      net income on sale of discontinued operation - autoone
                                            1,000,000                        
      net gain on sale of discontinued operation - esurance
                                                                    
      net cash (used for) provided from operations — continuing operations
                                                                    
      net cash (used for) provided from operations — discontinued operations
                                                                    
      net cash provided from (used for) investing activities — discontinued operations
                                                                    
      repayment of debt
                                                                    
      settlement of interest rate swap associated with mortgage note
                                                                    
      capital lease obligation
                                                                    
      net cash provided from financing activities — discontinued operations
                                                                    
      net increase in cash during year
                                                                    
      net decrease in cash from discontinued operations
                                                                    
      currency
                                                                    
      swedish kronor
                                                                    
      british pound
                                                                    
      canadian dollar
                                                                    
      contribution to discontinued operations
                                                                    
      sales of consolidated and unconsolidated affiliates
                                                                    
      net cash provided from (used for) investing activities - discontinued operations
                                             165,800,000                       
      cash dividends paid on sirius group preference shares
                                                                    
      loss and lae reserves acquired — central national
                                                                    
      loss and lae reserves sold — onebeacon personal lines
                                                                    
      cash dividends paid on white mountains re group, ltd. preference shares
                                                                    
      net increase in cash during the period
                                              40,100,000 6,800,000       -83,500,000 134,200,000  -9,500,000 -41,600,000 58,300,000 -13,400,000 27,300,000  18,700,000     
      cash reclassified to assets held for personal lines transaction
                                                                    
      net change in ceded reinsurance premiums receivable
                                                                    
      sales of trust account investments
                                                                    
      issuance of debt
                                                        175,800,000 475,000,000 394,400,000 417,400,000 15,000,000     
      redemption of mandatorily redeemable preferred stock
                                                                    
      cash dividends paid to mandatorily redeemable preferred shareholders
                                                                    
      cash exchanged with berkshire hathaway inc. for the company’s common shares
                                                                    
      settlement of interest rate swap
                                                                    
      net decrease in cash during the period
                                                                    
      net (income tax payments to) income tax receipts from national governments
                                                                    
      net (income tax payments to) tax receipts from national governments
                                                                    
      assets held for sale:
                                                                    
      short-term investments, at amortized cost
                                                                    
      reinsurance recoverable on unpaid losses
                                                                    
      reinsurance recoverable on paid losses
                                                                    
      premiums receivable
                                                                    
      deferred acquisition costs
                                                                    
      net deferred tax asset
                                                                    
      total assets held for sale
                                                                    
      liabilities held for sale:
                                                                    
      loss and lae reserves
                                                                    
      unearned premiums
                                                                    
      total liabilities held for sale
                                                                    
      net assets held for sale
                                                                    
      net change in fixed maturity investments held for collateral under onebeacon’s securities lending program
                                                                    
      net change in short-term investments held for collateral under onebeacon’s securities lending program
                                                                    
      net change in onebeacon’s securities lending payable
                                                       46,900,000             
      proceeds from option exercises
                                                   500,000      300,000 100,000         
      net cash (used for) provided from financing activities
                                                                    
      net (tax payments to) tax receipts from national governments
                                                   -5,100,000                 
      loss and lae reserves acquired-central national
                                                   17,600,000                 
      net change in loss reserves
                                                                    
      deferred income tax provision
                                                                    
      undistributed equity in earnings (losses) from unconsolidated affiliates, after-tax
                                                                    
      net change in loss and lae reserves
                                                                    
      net change in reserves for structured contracts
                                                                    
      issuance of wmre preference shares, net of issuance costs
                                                                    
      interest rate swap agreements associated with wmre senior notes
                                                                    
      company’s common shares repurchased and retired
                                                                    
      net cash (used for) financing activities
                                                                    
      swedish krona
                                                                    
      net income - white mountains and noncontrolling interests
                                                     192,700,000               
      excess of fair value of acquired assets over cost
                                                                    
      maturities of trust account investments
                                                         302,200,000 3,400,000 26,900,000 6,900,000       
      cash dividends paid to preferred shareholders
                                                                    
      net receipts from (payments to) national governments
                                                     14,100,000 -7,400,000 20,600,000             
      loss and lae reserves acquired - helicon
                                                           13,700,000         
      distributions of other long-term investments
                                                      10,200,000 10,300,000             
      noncontrolling interest
                                                       6,700,000             
      net realized investment losses
                                                        421,800,000 129,000,000 4,900,000 13,000,000         
      net unrealized investment losses
                                                        108,300,000 320,900,000 54,200,000 105,000,000         
      gain on sale of shares through initial public offering of onebeacon ltd.
                                                                    
      minority interest
                                                            26,400,000 19,000,000       
      undistributed equity in (losses) earnings from unconsolidated affiliates, after-tax
                                                                    
      net change in funds held by ceding reinsurers
                                                                    
      sales of common equity securities and other investments
                                                                  129,300,000 131,700,000 
      sale of agri renewal rights
                                                                    
      purchases of trust account assets
                                                                    
      purchases of common equity securities and other investments
                                                                    
      interest rate swap agreements
                                                                    
      cash dividends paid to onebeacon ltd.’s minority common shareholders
                                                                    
      cash dividends paid on wmre preference shares
                                                                    
      sales of other investments
                                                         7,200,000 2,300,000 34,900,000 57,400,000 27,600,000  26,600,000 10,600,000 12,700,000   
      sale of shares of onebeacon ltd.
                                                            16,700,000       
      purchases of other investments
                                                                    
      issuance of white mountains re group, ltd. preference shares, net of issuance costs
                                                                    
      cash dividends paid on white mountains re group ltd. preference shares
                                                                    
      net payments to national governments
                                                         -27,000,000           
      net change in loss reserves - sierra insurance group
                                                                    
      net realized investment gains
                                                                    
      purchases of unconsolidated affiliates
                                                                    
      interest rate swap agreement
                                                                    
      net federal income taxes (paid) received
                                                                    
      total incurred loss and lae
                                                             613,300,000       
      gain on sale of shares of onebeacon insurance group, ltd.
                                                                    
      undistributed equity in earnings from unconsolidated insurance affiliates, after-tax
                                                                    
      net federal income tax receipts
                                                                    
      sales of renewal rights
                                                                    
      carrying value of net liability for weather derivative contracts at january 1, 2006
                                                                    
      net consideration received during the year for new contracts
                                                                    
      net payments made on contracts settled during the year
                                                                    
      net decrease in fair value on settled and unsettled contracts
                                                                    
      carrying value of net liability for weather derivative contracts at december 31, 2006
                                                                    
      sales of consolidated affiliate, net of cash sold
                                                                    
      sale of renewal rights
                                                                    
      net federal income taxes received
                                                               17,500,000   
      millions, except per share amounts
                                                                    
      net income, as reported
                                                               -213,100,000 -29,500,000 176,300,000   
      add: option income included in reported net income under apb 25 and fin 28
                                                                    
      less: option expense determined under fas 123
                                                                    
      net income, pro forma
                                                               -214,900,000 -27,400,000 175,300,000   
      earnings per share:
                                                                    
      basic - as reported
                                                                 16,380,000   
      basic - pro forma
                                                                 16,290,000   
      diluted - as reported
                                                                    
      diluted - pro forma
                                                                    
      add: option expense included in reported net income under apb 25 and fin 28
                                                                    
      basic—as reported
                                                                    
      basic—pro forma
                                                                    
      diluted—as reported
                                                                    
      diluted—pro forma
                                                                    
      less: option income included in reported net income under apb 25 and fin 28
                                                                 1,000,000   
      option expense determined under fas 123
                                                                    
      net change in insurance and reinsurance balances receivable
                                                                    
      net decrease in short-term investments
                                                                    
      maturities of fixed maturity investments
                                                                  -125,700,000 272,100,000 
      proceeds from issuances of debt
                                                                    
      repayments of debt
                                                                    
      dividends paid on mandatorily redeemable preferred stock of subsidiaries
                                                                    
      dividends paid on common shares
                                                                    
      charges (credits) to reconcile net income to cash flows used for operations:
                                                                    
      sales of consolidated affiliates, net of cash sold
                                                                    
      sale of montpelier common shares
                                                                    
      purchases of consolidated affiliates, net of cash acquired
                                                                    
      investment in unconsolidated insurance affiliate
                                                                    
      proceeds from exercise of warrants to acquire common shares
                                                                    
      net income taxes paid
                                                                    
      (unaudited) millions, except per share amounts
                                                                    
      total revenues
                                                                   1,161,600,000 
      income before extraordinary items
                                                                   -50,800,000 
      pro forma net income - basic
                                                                   -3,030,000 
      pro forma net income - diluted
                                                                   -1,550,000 
      excess of fair value of acquired net assets over cost - sierra group
                                                                    
      sale of consolidated affiliate, net of cash sold
                                                                    
      charges (credits) to reconcile net income to cash flows from operations:
                                                                    
      cumulative effect of changes in accounting principles
                                                                    
      loss on early extinguishment of debt
                                                                    
      dividends on preferred stock subject to mandatory redemption
                                                                    
      share appreciation expense for series b warrants
                                                                    
      amortization of deferred credits and other benefits
                                                                    
      undistributed equity in earnings from unconsolidated insurance affiliates, after tax
                                                                    
      net income tax receipts
                                                                    
      net cash from operating activities
                                                                    
      net decrease (increase) in short-term investments
                                                                    
      proceeds from sales of subsidiaries and affiliates, net of cash acquired
                                                                    
      proceeds from issuances of common shares and convertible preference shares
                                                                    
      proceeds from issuances of preferred stock of subsidiaries
                                                                    
      proceeds from the issuance of warrants
                                                                    
      dividends paid on convertible preference shares
                                                                    
      common shares repurchased and retired
                                                                    
      basic earnings
                                                                    
      net income from continuing operations
                                                                    
      redemption value adjustment and dividends on convertible preference shares
                                                                    
      net income from continuing operations available to common shareholders
                                                                    
      extraordinary income items
                                                                    
      net income available to common shareholders
                                                                    
      diluted earnings
                                                                    
      other effects on diluted earnings
                                                                    
      adjusted net income available to common shareholders
                                                                    
      earnings
                                                                    
      average outstanding dilutive options and warrants to acquire common shares
                                                                    
      diluted earnings per share denominator
                                                                    
    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.