CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues
Earned premiums	$ 276.5	$ 286.5
Net investment income	10.0	9.4
Net realized and change in unrealized investment gains	18.9	28.4
Net other revenues	1.0	24.0
Total revenues	306.4	348.3
Expenses
Loss and loss adjustment expenses	149.4	148.9
Policy acquisition expenses	46.7	54.8
Other underwriting expenses	49.4	49.3
General and administrative expenses	3.3	4.0
Interest expense	3.2	3.2
Total expenses	252.0	260.2
Pre-tax income from continuing operations	54.4	88.1
Income tax expense	(6.5)	(19.8)
Net income from continuing operations	47.9	68.3
Income (loss) from discontinued operations, net of tax	(0.5)	0.5
Net income, including noncontrolling interests	47.4	68.8
Less: Net income attributable to noncontrolling interests	(0.4)	(0.4)
Net income attributable to OneBeacon's common shareholders	47.0	68.4
Other comprehensive income, net of tax	0	0.1
Comprehensive income attributable to OneBeacon's common shareholders	$ 47.0	$ 68.5
Earnings (loss) per share attributable to OneBeacon's common shareholders—basic and diluted
Net income from continuing operations, per share	$ 0.50	$ 0.71
Loss from discontinued operations, net of tax, per share	$ (0.01)	$ 0.00
Net income attributable to OneBeacon's common shareholders per share	$ 0.49	$ 0.71
Dividends declared and paid per OneBeacon's common share	$ 0.21	$ 0.21