Stockholders' Equity (Components of Stockholders' Equity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Beginning balance	$ 6,202
Net Income	1,684	1,943	1,994
Unrealized Translation	249	(334)	(625)
Employee postretirement benefits	(134)	55	(34)
Other	(30)	(16)	3
Comprehensive Income	1,271	2,316	2,588
Redemption of redeemable preferred securities	500
Ending Balance	5,529	6,202
Comprehensive Income [Member]
Net Income	1,684	1,943	1,994
Unrealized Translation	(249)	334	625
Employee postretirement benefits	(134)	55	(34)
Other	(30)	(16)	3
The Corporation [Member]
Beginning balance	5,917	5,406	3,878
Net Income	1,591	1,843	1,884
Unrealized Translation	(236)	326	619
Employee postretirement benefits	(133)	57	(32)
Other	(31)	(16)	3
Stock-based awards exercised or vested	443	133	150
Income tax benefits on stock-based compensation	10	2	7
Shares repurchased	(1,247)	(809)	(7)
Recognition of stock-based compensation	48	52	86
Dividends declared	(1,107)	(1,085)	(996)
Additional investment in subsidiary and other			(186)
Stockholders' Equity, Other	(6)	8
Redemption of redeemable preferred securities	0
Return on redeemable preferred securities and noncontrolling interests	0	0	0
Ending Balance	5,249	5,917	5,406
Noncontrolling Interests [Member]
Beginning balance	285	284	383
Net Income	39	44	54
Unrealized Translation	(13)	7	6
Employee postretirement benefits	(1)	(2)	(2)
Other	1	0	0
Stock-based awards exercised or vested	0	0	0
Income tax benefits on stock-based compensation	0	0	0
Shares repurchased	0	0	0
Recognition of stock-based compensation	0	0	0
Dividends declared	(29)	(47)	(45)
Additional investment in subsidiary and other			(111)
Stockholders' Equity, Other	(1)		112
Return on redeemable preferred securities and noncontrolling interests and other	2	1
Redemption of redeemable preferred securities	0
Return on redeemable preferred securities and noncontrolling interests	(1)	0	(1)
Ending Balance	280	285	284
Redeemable Securities of Subsidiaries [Member]
Beginning balance	1,047	1,052	1,032
Net Income	54	56	56
Unrealized Translation	0	1	0
Employee postretirement benefits	0	0	0
Other	0	0	0
Stock-based awards exercised or vested	0	0	0
Income tax benefits on stock-based compensation	0	0	0
Shares repurchased	0	0	0
Recognition of stock-based compensation	0	0	0
Dividends declared	(1)	(1)	(1)
Additional investment in subsidiary and other			18
Stockholders' Equity, Other	4	(7)
Redemption of redeemable preferred securities	(500)
Return on redeemable preferred securities and noncontrolling interests	(57)	(54)	(53)
Ending Balance	$ 547	$ 1,047	$ 1,052