Condensed Consolidated Statements of Shareholders' Equity (USD $) In Millions	Total	Common Stock	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Balance at Dec. 31, 2010
Cumulative effect of a change in accounting for deferred policy acquisition costs, net of tax	$ (22)			$ (22)
Balance (As Adjusted)	5,033	393	1,096	3,863	901	(1,220)
Balance at Dec. 31, 2011	5,055	393	1,096	3,885	901	(1,220)
Balance (in shares) (As Adjusted)		162
Balance (in shares) at Dec. 31, 2011		162
NET INCOME	118			118
Other comprehensive income, net	109				109
Dividends declared	(130)			(130)
Stock-based awards exercised and vested (in shares)		0
Stock-based awards exercised and vested	2		1			1
Stock-based compensation	8		8
Purchases	0					0
Other	4		1			3
Balance at Jun. 30, 2012	5,144	393	1,106	3,851	1,010	(1,216)
Balance (in shares) at Jun. 30, 2012		162
Balance at Dec. 31, 2012	5,453	394	1,134	4,021	1,129	(1,225)
Balance (in shares) at Dec. 31, 2012	197	163
NET INCOME	264			264
Other comprehensive income, net	92				92
Dividends declared	(133)			(133)
Stock-based awards exercised and vested (in shares)		1
Stock-based awards exercised and vested	24	2	17			5
Stock-based compensation	10		10
Purchases	(15)					(15)
Other	4		1			3
Balance (As Adjusted)	5,699
Balance at Jun. 30, 2013	$ 5,699	$ 396	$ 1,162	$ 4,152	$ 1,221	$ (1,232)
Balance (in shares) at Jun. 30, 2013	198	164