Condensed Consolidated Statements of Shareholders' Equity (USD $) In Millions, except Share data	Total	Scenario, Previously Reported	Effect Of New Guidance Adoption On Deferred Policy Acquisition Costs	Common Stock	Common Stock Scenario, Previously Reported	Paid-In Capital	Paid-In Capital Scenario, Previously Reported	Retained Earnings	Retained Earnings Scenario, Previously Reported	Retained Earnings Effect Of New Guidance Adoption On Deferred Policy Acquisition Costs	Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income Scenario, Previously Reported	Treasury Stock	Treasury Stock Scenario, Previously Reported
Balance at Dec. 31, 2010	$ 5,012	$ 5,032	$ (20)	$ 393	$ 393	$ 1,091	$ 1,091	$ 3,960	$ 3,980	$ (20)	$ 769	$ 769	$ (1,201)	$ (1,201)
Balance (in shares) at Dec. 31, 2010				163,000,000	163,000,000
NET INCOME	30							30
Other comprehensive income, net	(66)										(66)
Dividends declared	(196)							(196)
Stock-based awards exercised and vested	(2)					(5)							3
Stock-based compensation	10					10
Purchases	(30)												(30)
Other	6					2							4
Balance at Sep. 30, 2011	4,764			393		1,098		3,794			703		(1,224)
Balance (in shares) at Sep. 30, 2011				163,000,000
Balance at Dec. 31, 2011	5,033			393		1,096		3,863			901		(1,220)
Balance (in shares) at Dec. 31, 2011	196,000,000			162,000,000
NET INCOME	229							229
Other comprehensive income, net	270										270
Dividends declared	(196)							(196)
Stock-based awards exercised and vested (in shares)				1,000,000
Stock-based awards exercised and vested	13			1		10							2
Stock-based compensation	12					12
Purchases	(7)												(7)
Other	5					1							4
Balance at Sep. 30, 2012	$ 5,359			$ 394		$ 1,119		$ 3,896			$ 1,171		$ (1,221)
Balance (in shares) at Sep. 30, 2012	197,000,000			163,000,000