Stockholders' Equity (Components Of Stockholders' Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Redeemable Preferred and Common Securities of Subsidiaries	$ 549		$ 549		$ 549
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2012			5,287
Net Income	565	537	1,663	1,542
Temporary Equity, Net Income			23
Unrealized currency translation adjustments	204	141	(387)	133
Employee postretirement benefits	(5)	(54)	84	(46)
Other	(19)	(10)	9	(10)
Comprehensive Income	745	614	1,369	1,619
Recognition of stock-based compensation			(73)	(57)
Balance at September 30, 2013	4,976		4,976
Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2012			4,985
Net Income			1,603
Unrealized currency translation adjustments			(386)	124
Employee postretirement benefits			84
Other			9	(10)
Stock-based awards exercised or vested			163
Recognition of stock-based compensation			73
Income tax benefits on stock-based compensation			30
Shares repurchased			(963)
Dividends declared			(934)
Other			3
Temporary Equity, Return			0
Balance at September 30, 2013	4,667		4,667
Noncontrolling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2012			302
Net Income			37
Unrealized currency translation adjustments			(1)
Employee postretirement benefits			0
Other			0
Stock-based awards exercised or vested			0
Recognition of stock-based compensation			0
Income tax benefits on stock-based compensation			0
Shares repurchased			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			(27)
Other			(1)
Temporary Equity, Return			(1)
Balance at September 30, 2013	309		309
Redeemable Securities Of Subsidiaries [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Temporary Equity, Other Changes			(2)
Temporary Equity, Return			$ (21)