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CONSOLIDATED BALANCE SHEETS (Statement) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Assets    
Goodwill and other intangible assets $ 485.2 $ 62.1
Total assets 3,422.8 3,659.2
Liabilities    
Debt 164.3 23.8
Total liabilities 583.2 298.4
White Mountains’s common shareholders’ equity    
White Mountains’ common shares 3.2 3.8
Paid-in surplus 576.3 666.8
Retained earnings 2,407.3 2,823.2
Accumulated other comprehensive loss, after tax:    
Net unrealized foreign currency translation losses (2.8) (1.3)
Total White Mountains’s common shareholders’ equity 2,984.0 3,492.5
Non-controlling interests    
Non-controlling interests (144.4) (131.7)
Total equity 2,839.6 3,360.8
Total liabilities and equity 3,422.8 3,659.2
HG Global-BAM    
Assets    
Fixed maturity investments, at fair value 677.7 623.6
Short-term investments, at fair value 35.9 69.8
Total investments 713.6 693.4
Cash 17.9 25.6
Insurance premiums receivable 6.3 4.5
Deferred acquisition costs 17.6 14.8
Accrued investment income 4.8 3.4
Accounts receivable on unsettled investment sales 0.2 0.1
Other assets 5.1 5.6
Total assets 765.5 747.4
Liabilities    
Unearned insurance premiums 156.2 136.8
Accounts payable on unsettled investment purchases 6.5 0.6
Other liabilities 30.0 29.6
Total liabilities 192.7 167.0
NSM Holding Co LLC    
Assets    
Short-term investments, at fair value 0.9 0.0
Cash 60.6 0.0
Insurance premiums receivable 29.1 0.0
Goodwill and other intangible assets 431.0 0.0
Other assets 18.8 0.0
Total assets 540.4 0.0
Liabilities    
Debt 149.3 0.0
Premiums payable 56.6 0.0
Contingent consideration earnout liabilities 20.1 0.0
Other liabilities 27.7 0.0
Total liabilities 253.7 0.0
Non-controlling interests    
Non-controlling interests 14.1 0.0
MediaAlpha    
Assets    
Cash 13.0 9.1
Goodwill and other intangible assets 45.9 53.7
Accounts receivable from publishers and advertisers 35.9 32.4
Other assets 2.2 1.3
Total assets 97.0 96.5
Liabilities    
Debt 15.0 23.8
Amounts due to publishers and advertisers 37.7 31.6
Other liabilities 3.9 4.4
Total liabilities 56.6 59.8
Non-controlling interests    
Non-controlling interests 15.3 13.1
Other Segment    
Assets    
Fixed maturity investments, at fair value 354.2 1,506.1
Short-term investments, at fair value 276.9 106.3
Common equity securities, at fair value 1,043.5 866.1
Other long-term investments 289.7 208.8
Total investments 1,964.3 2,687.3
Cash 20.7 62.4
Accrued investment income 5.7 13.9
Accounts receivable on unsettled investment sales 3.3 20.9
Goodwill and other intangible assets 8.3 8.4
Other assets 14.3 19.1
Assets held for sale 3.3 3.3
Total assets 2,019.9 2,815.3
Liabilities    
Accrued incentive compensation 40.3 60.6
Accounts payable on unsettled investment purchases 14.2 0.0
Other liabilities 25.7 11.0
Total liabilities $ 80.2 $ 71.6