Stockholders' Equity (Components Of Stockholders' Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Beginning balance			$ 5,529
Net income	537	458	1,542	1,262
Net Income (Loss) Attributable to Parent	517	432	1,483	1,190
Net Income (Loss) Attributable to Noncontrolling Interest	(20)	(26)	(59)	(72)
Other	(10)	(8)	(10)	(36)
Comprehensive Income	614	(169)	1,619	1,047
Ending balance	5,839		5,839
Comprehensive Income [Member]
Net income			1,542	1,262
Unrealized translation			133	(224)
Employee postretirement benefits			(46)	45
Other			(10)	(36)
Comprehensive Income			1,619	1,047
The Corporation [Member]
Beginning balance			5,249	5,917
Net Income (Loss) Attributable to Parent			1,483	1,190
Unrealized translation			124	(209)
Employee postretirement benefits			(48)	44
Other			(10)	(36)
Stock-based awards exercised or vested			516	306
Income tax benefits on stock-based compensation			39	7
Shares repurchased			(1,006)	(1,246)
Recognition of stock-based compensation			57	37
Dividends declared			(874)	(830)
Other			5	(1)
Return on redeemable securities of subsidiaries			0	0
Ending balance	5,535	5,179	5,535	5,179
Noncontrolling Interests [Member]
Beginning balance			280	285
Net Income (Loss) Attributable to Noncontrolling Interest			36	30
Unrealized translation			9	(15)
Employee postretirement benefits			2	1
Other			0	0
Stock-based awards exercised or vested			0	0
Income tax benefits on stock-based compensation			0	0
Shares repurchased			0	0
Recognition of stock-based compensation			0	0
Dividends declared			(20)	(17)
Other			(2)	1
Return on redeemable securities of subsidiaries			(1)	(1)
Ending balance	304	284	304	284
Redeemable Securities Of Subsidiaries [Member]
Beginning balance			547	1,047
Net income			23	42
Unrealized translation			0	0
Employee postretirement benefits			0	0
Other			0	0
Stock-based awards exercised or vested			0	0
Income tax benefits on stock-based compensation			0	0
Shares repurchased			0	0
Recognition of stock-based compensation			0	0
Dividends declared			0	(1)
Other			(2)	(1)
Return on redeemable securities of subsidiaries			(21)	(40)
Ending balance	$ 547	$ 1,047	$ 547	$ 1,047