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 ($)	Retained Earnings Appro. USD ($)	Retained Earnings Unappro. USD ($)	Accum. Other Comprehensive Inc. (Loss) USD ($)	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	84				136		136	(52)
Other comprehensive income	122					120	120	2
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	4,504		1,239	142	2,355	615	4,351	153
Ending Balance, shares at Jun. 30, 2011		101,020,235
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	172				212		212	(40)
Other comprehensive income	196					193	193	3
Allocation of losses of managed investment entities				(46)			(46)	46
Dividends on Common Stock	(33)				(33)		(33)
Shares issued:
Exercise of stock options	21		21				21
Exercise of stock options, shares		814,394
Other benefit plans	5		5				5
Other benefit plans, shares		276,195
Dividend reinvestment plan, shares		7,711
Stock-based compensation expense	12		12				12
Shares acquired and retired	(153)		(50)		(103)		(153)
Shares acquired and retired, shares		(3,985,470)
Other	(2)							(2)
Ending Balance at Jun. 30, 2012	$ 4,775		$ 1,207	$ 127	$ 2,515	$ 773	$ 4,622	$ 153
Ending Balance, shares at Jun. 30, 2012	94,959,232	94,959,232