CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets
Fixed maturity investments, at fair value	$ 4,771.9	$ 4,784.3
Short-term investments, at amortized cost (which approximates fair value)	929.2	871.7
Common equity securities, at fair value	786.9	801.6
Convertible fixed maturity and preferred investments, at fair value	15.8	20.5
Other long-term investments	402.6	407.0
Total investments	6,906.4	6,885.1
Cash (restricted: $29.0 and $23.7)	335.8	373.2
Reinsurance recoverable on unpaid losses	436.9	483.9
Reinsurance recoverable on paid losses	29.8	23.6
Insurance and reinsurance premiums receivable	706.9	547.7
Funds held by ceding entities	99.6	129.0
Investments in unconsolidated affiliates	450.8	414.4
Deferred acquisition costs	192.0	177.1
Deferred tax asset	417.9	456.1
Ceded unearned insurance and reinsurance premiums	145.1	94.0
Accrued investment income	30.4	34.5
Accounts receivable on unsettled investment sales	12.0	56.5
Goodwill and intangible assets	362.6	366.4
Other assets	323.6	356.1
Assets held for sale	58.0	58.1
Total assets	10,507.8	10,455.7
Liabilities
Loss and loss adjustment expense reserves	3,035.0	3,159.8
Unearned insurance and reinsurance premiums	1,102.5	955.3
Debt	749.8	746.6
Deferred tax liability	254.0	282.8
Accrued incentive compensation	100.5	184.6
Ceded reinsurance payable	151.8	105.7
Funds held under insurance and reinsurance contracts	143.3	138.9
Accounts payable on unsettled investment purchases	92.6	2.6
Other liabilities	338.5	341.0
Total liabilities	5,968.0	5,917.3
White Mountains’s common shareholders’ equity
White Mountains’ common shares	6.0	6.0
Paid-in surplus	1,032.7	1,028.7
Retained earnings	3,080.8	3,010.5
Accumulated other comprehensive income (loss), after tax:
Equity in net unrealized gains from investment in Symetra common shares	63.8	34.9
Net unrealized foreign currency translation losses	(167.6)	(79.8)
Pension liability and other	(4.4)	(4.6)
Total White Mountains’s common shareholders’ equity	4,011.3	3,995.7
Non-controlling interests
Total non-controlling interests	528.5	542.7
Total equity	4,539.8	4,538.4
Total liabilities and equity	10,507.8	10,455.7
OneBeacon
Non-controlling interests
Total non-controlling interests	258.8	258.4
Sirius Group
Non-controlling interests
Total non-controlling interests	250.0	250.0
HG Global
Non-controlling interests
Total non-controlling interests	17.7	17.9
Mutuals and reciprocals
Non-controlling interests
Total non-controlling interests	(140.5)	(134.3)
Other Noncontrolling Interest
Non-controlling interests
Total non-controlling interests	$ 160.2	$ 168.6