CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Millions	Total	Preferred Stock [Member]	Common stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance as of beginning-of-year at Dec. 31, 2009 (Scenario, Previously Reported [Member])				$ 3,316	$ (262)
Balance as of beginning-of-year (Restatement Adjustment [Member]) (Accounting Standards Update 2010-26 [Member])				(1,032)
Balance as of beginning-of-year (Restatement Adjustment [Member]) (Accounting Standards Update 2009-17 [Member])				(169)	181
Balance as of beginning-of-year (Restatement Adjustment [Member]) (Tax Restatement [Member])				(113)
Balance as of beginning-of-year at Dec. 31, 2009		806	7,840
Issuance (Redemption) of Series B preferred stock		(950)
Accretion of discount on Series B preferred stock		144		(144)
Issuance of common stock			368
Issuance (repurchase and cancellation) of common stock warrants			(48)
Stock compensation/issued for benefit plans			18
Effect of amendment to deferred compensation plans			(29)
Retirement of common stock/cancellation of shares			(25)
Comprehensive income (loss)	2,015
Other comprehensive income (loss), net of tax					932
Net income (loss)	902			902
Net income (loss) (Accounting Standards Update 2010-26 [Member])	(64)
Net income (loss) (Tax Restatement [Member])	(14)
Net income (loss) at Jan. 01, 2010 (Scenario, Previously Reported [Member])	980
Retirement of common stock				0
Dividends declared: Common (2012 - $0.360; 2011 - $0.230; 2010 - $0.080)				(26)
Dividends on preferred stock				(23)
Foreign currency translation adjustment	(2)
Change during the period, Funded Status of Employee Benefit Plans	29
Balance as of end-of-year at Dec. 31, 2010	11,686	0	8,124	2,711	851
Issuance (Redemption) of Series B preferred stock		0
Accretion of discount on Series B preferred stock		0		0
Issuance of common stock			0
Issuance (repurchase and cancellation) of common stock warrants			0
Stock compensation/issued for benefit plans			17
Effect of amendment to deferred compensation plans			(6)
Retirement of common stock/cancellation of shares			(545)
Comprehensive income (loss)	2,050
Other comprehensive income (loss), net of tax					1,829
Net income (loss)	221			221
Net income (loss) (Accounting Standards Update 2010-26 [Member])	(62)
Net income (loss) (Tax Restatement [Member])	(11)
Net income (loss) at Jan. 01, 2011 (Scenario, Previously Reported [Member])	294
Retirement of common stock				(30)
Dividends declared: Common (2012 - $0.360; 2011 - $0.230; 2010 - $0.080)				(71)
Dividends on preferred stock				0
Foreign currency translation adjustment	0
Change during the period, Funded Status of Employee Benefit Plans	(97)
Balance as of end-of-year at Dec. 31, 2011 (Scenario, Previously Reported [Member])	14,164
Balance as of end-of-year (Accounting Standards Update 2010-26 [Member])	(925)
Balance as of end-of-year (Tax Restatement [Member])	(138)
Balance as of end-of-year at Dec. 31, 2011	13,101	0	7,590	2,831	2,680
Issuance (Redemption) of Series B preferred stock		0
Accretion of discount on Series B preferred stock		0		0
Issuance of common stock			0
Issuance (repurchase and cancellation) of common stock warrants			0
Stock compensation/issued for benefit plans			23
Effect of amendment to deferred compensation plans			0
Retirement of common stock/cancellation of shares			(492)
Comprehensive income (loss)	2,441
Other comprehensive income (loss), net of tax					1,128
Net income (loss)	1,313			1,313
Retirement of common stock				0
Dividends declared: Common (2012 - $0.360; 2011 - $0.230; 2010 - $0.080)				(100)
Dividends on preferred stock				0
Foreign currency translation adjustment	(5)
Change during the period, Funded Status of Employee Benefit Plans	(32)
Balance as of end-of-year at Dec. 31, 2012	$ 14,973	$ 0	$ 7,121	$ 4,044	$ 3,808