Consolidated Statement of Changes in Equity (Unaudited) (USD $) In Millions, except Share data, unless otherwise specified	Total USD ($)	Common Shares	Common Stock and Capital Surplus USD ($)	Retained Earnings Approp. USD ($)	Retained Earnings Unapprop. USD ($)	Accumulated Other Comprehensive Inc. (Loss) USD ($)	Total USD ($)	Noncontrolling Interests USD ($)
Beginning Balance at Dec. 31, 2010	$ 4,481		$ 1,271	$ 197	$ 2,368	$ 495	$ 4,331	$ 150
Beginning Balance, shares at Dec. 31, 2010		105,168,366
Balance, as previously reported at Dec. 31, 2010	4,620		1,271	197	2,523	479	4,470	150
Balance shares, as previously reported at Dec. 31, 2010		105,168,366
Net earnings	192				233		233	(41)
Other comprehensive income	93					90	90	3
Allocation of losses of managed investment entities	0			(47)			(47)	47
Dividends on Common Stock	(50)				(50)		(50)
Shares issued:
Exercise of stock options, shares		758,075
Exercise of stock options	19		19				19
Other benefit plans, shares		371,392
Other benefit plans	8		8				8
Dividend reinvestment plan, shares		11,686
Stock-based compensation expense	10		10				10
Shares acquired and retired, shares		(7,803,286)
Shares acquired and retired	(263)		(95)		(168)		(263)
Other	(4)							(4)
Ending Balance at Sep. 30, 2011	4,486		1,213	150	2,383	585	4,331	155
Ending Balance, shares at Sep. 30, 2011		98,506,233
Beginning Balance at Dec. 31, 2011	4,557		1,219	173	2,439	580	4,411	146
Beginning Balance, shares at Dec. 31, 2011	97,846,402	97,846,402
Net earnings	383				438		438	(55)
Other comprehensive income	360					352	352	8
Allocation of losses of managed investment entities	0			(64)			(64)	64
Dividends on Common Stock	(50)				(50)		(50)
Shares issued:
Exercise of stock options, shares		1,009,714
Exercise of stock options	27		27				27
Other benefit plans, shares		291,610
Other benefit plans	6		6				6
Dividend reinvestment plan, shares		11,697
Stock-based compensation expense	15		15				15
Shares exchanged - benefit plans, shares		(23,685)
Shares acquired and retired, shares		(8,288,776)
Shares acquired and retired	(315)		(105)		(210)		(315)
Other	(19)				(40)	(1)	(41)	22
Ending Balance at Sep. 30, 2012	$ 4,964		$ 1,162	$ 109	$ 2,577	$ 931	$ 4,779	$ 185
Ending Balance, shares at Sep. 30, 2012	90,846,962	90,846,962