CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues
Earned insurance and reinsurance premiums	$ 1,987.3	$ 2,063.6	$ 1,924.5
Net investment income	110.9	153.6	184.5
Net realized and unrealized investment gains	161.7	118.2	74.1
Other revenue	57.5	100.3	(10.0)
Total revenues	2,317.4	2,435.7	2,173.1
Expenses
Loss and loss adjustment expenses	1,040.5	1,193.9	1,174.3
Insurance and reinsurance acquisition expenses	376.9	430.2	402.2
Other underwriting expenses	331.3	321.8	268.1
General and administrative expenses	181.3	182.2	175.3
Interest expense on debt	42.5	44.8	55.2
Total expenses	1,972.5	2,172.9	2,075.1
Pre-tax income	344.9	262.8	98.0
Income tax (expense) benefit	(76.6)	15.7	110.0
Net income from continuing operations	268.3	278.5	208.0
Gain (loss) on sale of discontinued operations, net of tax	46.6	(91.0)	658.3
Net loss from discontinued operations, net of tax	(42.1)	(24.0)	(36.7)
Income before equity in earnings of unconsolidated affiliates	272.8	163.5	829.6
Equity in earnings (losses) of unconsolidated affiliates, net of tax	36.6	29.9	(20.2)
Net income	309.4	193.4	809.4
Net loss (income) attributable to non-controlling interests	12.4	14.0	(41.5)
Net income attributable to White Mountains’ common shareholders	321.8	207.4	767.9
Other comprehensive income, net of tax:
Change in equity in net unrealized (losses) gains from investments in Symetra common shares, net of tax	(98.1)	57.7	(58.5)
Change in foreign currency translation, net of tax	2.7	39.6	(15.2)
Net change in pension liability and other, net of tax	20.8	(2.9)	(10.8)
Comprehensive income	247.2	301.8	683.4
Comprehensive (income) loss attributable to non-controlling interests	(5.2)	0.8	2.8
Comprehensive income attributable to White Mountains’ common shareholders	$ 242.0	$ 302.6	$ 686.2
Basic earnings (loss) per share
Continuing operations	$ 51.15	$ 47.41	$ 18.56
Discontinued operations	$ 0.74	$ (16.91)	$ 78.88
Total consolidated operations	$ 51.89	$ 30.50	$ 97.44
Diluted earnings (loss) per share
Continuing operations	$ 51.15	$ 47.41	$ 18.56
Discontinued operations	$ 0.74	$ (16.91)	$ 78.88
Total consolidated operations	$ 51.89	$ 30.50	$ 97.44
Dividends declared and paid per White Mountains’ common share	$ 1.00	$ 1.00	$ 1.00