Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues
Net earned premiums	$ 1,764	$ 1,649
Net investment income	633	648
Net realized investment gains (losses):
Other-than-temporary impairment losses	(18)	(15)
Portion of other-than-temporary impairments recognized in Other comprehensive income (loss)		(12)
Net other-than-temporary impairment losses recognized in earnings	(18)	(27)
Other net realized investment gains (losses)	46	63
Net realized investment gains (losses)	28	36
Other revenues	78	68
Total revenues	2,503	2,401
Claims, Benefits and Expenses
Insurance claims and policyholders’ benefits	1,429	1,381
Amortization of deferred acquisition costs	328	295
Other operating expenses	341	319
Interest	42	42
Total claims, benefits and expenses	2,140	2,037
Income (loss) before income tax	363	364
Income tax (expense) benefit	(113)	(114)
Net income (loss)	$ 250	$ 250
Basic and diluted earnings (loss) per share	$ 0.93	$ 0.93
Dividends per share	$ 0.20	$ 0.15
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	269.5	269.3
Diluted	269.9	269.7