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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Investments    
Other long-term investments $ 1,643.0 $ 1,488.0
Total assets 7,959.1 7,389.3
Liabilities    
Debt 556.3 575.2
Total liabilities 3,866.3 3,454.3
White Mountains’s common shareholders’ equity    
White Mountains’s common shares at $1 par value per share—authorized 50,000,000 shares; issued and outstanding 2,564,484 and 2,572,156 shares 2.6 2.6
Paid-in surplus 535.2 536.0
Retained earnings 3,367.3 3,211.8
Accumulated other comprehensive income (loss), after-tax:    
Net unrealized gains (losses) from foreign currency translation and interest rate swap (2.7) (3.5)
Total White Mountains’s common shareholders’ equity 3,902.4 3,746.9
Noncontrolling interests 190.4 188.1
Total equity 4,092.8 3,935.0
Total liabilities and equity 7,959.1 7,389.3
Financial Guarantee (HG Global/BAM)    
Investments    
Fixed maturity investments, at fair value 924.8 909.9
Short-term investments, at fair value 65.9 65.9
Total investments 990.7 975.8
Cash 4.8 18.2
Insurance premiums receivable 6.3 6.6
Deferred acquisition costs 36.9 36.0
Other assets 21.6 21.9
Total assets 1,060.3 1,058.5
Liabilities    
Unearned insurance premiums 299.8 298.3
Debt 146.6 146.5
Accrued incentive compensation 12.1 28.0
Other liabilities 30.1 29.0
Total liabilities 488.6 501.8
P&C Insurance and Reinsurance (Ark/WM Outrigger)    
Investments    
Fixed maturity investments, at fair value 765.0 772.8
Common equity securities, at fair value 340.4 334.6
Short-term investments, at fair value 553.7 484.6
Other long-term investments 393.9 373.6
Total investments 2,053.0 1,965.6
Cash 132.6 101.5
Reinsurance recoverables 570.6 595.3
Insurance premiums receivable 909.7 544.1
Deferred acquisition costs 208.5 127.2
Goodwill and other intangible assets 292.5 292.5
Other assets 71.5 65.2
Total assets 4,238.4 3,691.4
Liabilities    
Loss and loss adjustment expense reserves 1,345.6 1,296.5
Unearned insurance premiums 1,123.5 623.2
Debt 184.5 183.7
Reinsurance payable 193.0 251.1
Contingent consideration 42.9 45.3
Other liabilities 143.8 122.3
Total liabilities 3,033.3 2,522.1
Asset Management (Kudu)    
Investments    
Other long-term investments 683.2 695.9
Cash 36.6 101.4
Accrued investment income 19.1 12.4
Goodwill and other intangible assets 8.5 8.6
Other assets 20.6 7.6
Total assets 768.0 825.9
Liabilities    
Debt 191.6 208.3
Other liabilities 54.8 65.0
Total liabilities 246.4 273.3
Other Operations    
Investments    
Fixed maturity investments, at fair value 266.1 238.2
Common equity securities, at fair value 357.4 333.8
Short-term investments, at fair value 264.6 373.6
Investment in MediaAlpha, at fair value 253.8 168.6
Other long-term investments 565.9 418.5
Total investments 1,707.8 1,532.7
Cash 28.7 33.9
Goodwill and other intangible assets 75.2 91.3
Other assets 80.7 155.6
Total assets 1,892.4 1,813.5
Liabilities    
Debt 33.6 36.7
Accrued incentive compensation 40.0 86.1
Other liabilities 24.4 34.3
Total liabilities $ 98.0 $ 157.1