CONSOLIDATED BALANCE SHEET (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Fixed maturity investments, at fair value	$ 4,854.4	$ 5,196.2
Short-term investments, at amortized cost (which approximates fair value)	654.4	630.6
Common equity securities, at fair value	1,073.2	1,029.7
Convertible fixed maturity investments, at fair value	95.6	127.4
Other long-term investments	295.2	294.2
Total investments	6,972.8	7,278.1
Cash (restricted: $188.5 and $249.8)	411.5	462.4
Reinsurance recoverable on unpaid losses	410.8	429.1
Reinsurance recoverable on paid losses	15.6	17.9
Insurance and reinsurance premiums receivable	717.6	556.3
Funds held by ceding companies	110.6	127.4
Investments in unconsolidated affiliates	383.6	387.9
Deferred acquisition costs	190.4	195.3
Deferred tax asset	539.1	569.6
Ceded unearned insurance and reinsurance premiums	144.1	91.8
Accrued investment income	44.7	45.9
Accounts receivable on unsettled investment sales	99.0	3.9
Other assets	416.5	503.0
Assets held for sale	2,155.2	2,226.8
Total assets	12,611.5	12,895.4
Liabilities
Loss and loss adjustment expense reserves	3,100.6	3,168.9
Unearned insurance and reinsurance premiums	1,064.9	924.1
Variable annuity benefit guarantee	251.6	441.5
Debt	676.2	751.2
Deferred tax liability	337.1	341.3
Accrued incentive compensation	100.8	159.0
Ceded reinsurance payable	175.7	116.5
Funds held under reinsurance treaties	67.3	43.7
Accounts payable on unsettled investment purchases	25.7	11.4
Other liabilities	374.4	452.8
Liabilities held for sale	2,155.2	2,226.8
Total liabilities	8,329.5	8,637.2
White Mountains’ common shareholders’ equity
White Mountains’ common shares at $1 par value per share - authorized 50,000,000 shares; issued and outstanding 6,176,210 and 6,290,964 shares	6.2	6.3
Paid-in surplus	1,031.1	1,050.9
Retained earnings	2,601.4	2,542.7
Accumulated other comprehensive income, after tax:
Equity in net unrealized gains from investments in unconsolidated affiliates	49.7	57.7
Net unrealized foreign currency translation gains	82.0	85.7
Pension liability and other	(11.5)	(11.5)
Total White Mountains’ common shareholders’ equity	3,758.9	3,731.8
Non-controlling interests
Non-controlling interest - OneBeacon Ltd.	263.5	251.4
Non-controlling interest - SIG Preference Shares	250.0	250.0
Non-controlling interest - HG Global	16.6	16.6
Non-controlling interest - BAM	(53.8)	(36.0)
Non-controlling interest - other	46.8	44.4
Total non-controlling interests	523.1	526.4
Total equity	4,282.0	4,258.2
Total liabilities and equity	$ 12,611.5	$ 12,895.4