Stockholders' Equity - Changes in AOCI of the Parent (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,					$ (727)
Other comprehensive income (loss):
Other comprehensive income (loss) attributable to the parent company	(112)		38		(96)		(24)
Adjustments to other comprehensive income for purchase of noncontrolling interests					0		(3)
Balance,	(823)				(823)
Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	(711)		(858)		(727)		(793)
Other comprehensive income (loss):
Currency translation adjustments	(113)		30		(111)		(34)
Holding gains (losses)	(7)		3		(1)		4
Reclassification of amount to net income			(1)	[1]	(2)	[1]	(14)	[1]
Venezuelan bolivar devaluation	1				4		2
Reclassification adjustment for net actuarial losses included in net periodic benefit cost	6	[2]	6	[2]	14	[2]	18	[2]
Tax expense	1				0
Other comprehensive income (loss) attributable to the parent company	(112)		38		(96)		(24)
Adjustments to other comprehensive income for purchase of noncontrolling interests							(3)
Balance,	(823)		(820)		(823)		(820)
Parent [Member] | Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	(240)		(266)		(242)		(198)
Other comprehensive income (loss):
Currency translation adjustments	(113)		30		(111)		(34)
Tax expense
Other comprehensive income (loss) attributable to the parent company	(113)		30		(111)		(34)
Adjustments to other comprehensive income for purchase of noncontrolling interests							(4)
Balance,	(353)		(236)		(353)		(236)
Parent [Member] | Hedging [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	1		1		0		3
Other comprehensive income (loss):
Holding gains (losses)	(5)				(4)		2
Reclassification of amount to net income			(1)	[1]		[1]	(6)	[1]
Tax expense	1				1
Other comprehensive income (loss) attributable to the parent company	(4)		(1)		(3)		(4)
Adjustments to other comprehensive income for purchase of noncontrolling interests							1
Balance,	(3)		0		(3)		0
Parent [Member] | Investment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	6		3		3		12
Other comprehensive income (loss):
Holding gains (losses)	(2)		3		3		2
Reclassification of amount to net income				[1]	(2)	[1]	(8)	[1]
Tax expense
Other comprehensive income (loss) attributable to the parent company	(2)		3		1		(6)
Balance,	4		6		4		6
Parent [Member] | Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	(478)		(596)		(488)		(610)
Other comprehensive income (loss):
Venezuelan bolivar devaluation	1				4		2
Reclassification adjustment for net actuarial losses included in net periodic benefit cost	6	[2]	6	[2]	14	[2]	18	[2]
Tax expense					(1)
Other comprehensive income (loss) attributable to the parent company	7		6		17		20
Balance,	$ (471)		$ (590)		$ (471)		$ (590)

[1] Foreign currency contract and investment reclassifications are included in other income, net.

[2] See Note 9 for additional details.