Consolidated Statement of Changes in Equity (Unaudited) (USD $) In Millions, except Share data	Total USD ($)	Common Shares	Common Stock and Capital Surplus USD ($)	Retained Earnings Appro. USD ($)	Retained Earnings Unappro. USD ($)	Accum. Other Comprehensive Inc. (Loss) USD ($)	Total Shareholders' Equity USD ($)	Noncontrolling Interests USD ($)
Beginning Balance at Dec. 31, 2009	$ 3,919		$ 1,344	$ 0	$ 2,274	$ 163	$ 3,781	$ 138
Beginning Balance, shares at Dec. 31, 2009		113,386,343
Cumulative effect of accounting change	261			261	4	(4)	261
Net earnings	188				214		214	(26)
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on securities	242					240	240	2
Change in foreign currency translation	(1)					(1)	(1)
Total comprehensive income (loss)	429						453	(24)
Allocation of losses of managed investment entities				(33)			(33)	33
Dividends on Common Stock	(31)				(31)		(31)
Shares issued:
Exercise of stock options	11		11				11
Exercise of stock options, shares		523,671
Other benefit plans	5		5				5
Other benefit plans, shares		371,186
Dividend reinvestment plan, shares		8,672
Stock-based compensation expense	6		6				6
Shares acquired and retired	(151)		(66)		(85)		(151)
Shares acquired and retired, shares		(5,642,355)
Other	(2)		(1)				(1)	(1)
Ending Balance at Jun. 30, 2010	4,447		1,299	228	2,376	398	4,301	146
Ending Balance, shares at Jun. 30, 2010		108,647,517
Beginning Balance at Dec. 31, 2010	4,620		1,271	197	2,523	479	4,470	150
Beginning Balance, shares at Dec. 31, 2010	105,168,366	105,168,366
Net earnings	86				138		138	(52)
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on securities	96					94	94	2
Change in foreign currency translation	5					5	5
Change in unrealized pension and other postretirement benefits	1					1	1
Total comprehensive income (loss)	188						238	(50)
Allocation of losses of managed investment entities				(55)			(55)	55
Dividends on Common Stock	(34)				(34)		(34)
Shares issued:
Exercise of stock options	16		16				16
Exercise of stock options, shares		654,799
Other benefit plans	8		8				8
Other benefit plans, shares		357,042
Dividend reinvestment plan, shares		7,870
Stock-based compensation expense	7		7				7
Shares acquired and retired	(178)		(63)		(115)		(178)
Shares acquired and retired, shares		(5,167,842)
Other	(2)							(2)
Ending Balance at Jun. 30, 2011	$ 4,625		$ 1,239	$ 142	$ 2,512	$ 579	$ 4,472	$ 153
Ending Balance, shares at Jun. 30, 2011	101,020,235	101,020,235