Stockholders' Equity - Changes in AOCI of the Parent (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,					$ (727)
Other comprehensive income (loss):
Other comprehensive income (loss) attributable to the parent company	21		(57)		16		(62)
Adjustments to other comprehensive income for purchase of noncontrolling interests					0		(3)
Balance,	(711)				(711)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(732)		(801)		(727)		(793)
Other comprehensive income (loss):
Currency translation adjustments	14		(47)		2		(64)
Holding gains (losses)	4		(5)		6		1
Reclassification of amount to net income			(11)	[1]	(2)	[1]	(13)	[1]
Venezuelan bolivar devaluation					3		2
Amortization of net actuarial losses included in net periodic benefit cost	3	[2]	6	[2]	8	[2]	12	[2]
Tax expense					(1)
Other comprehensive income (loss) attributable to the parent company	21		(57)		16		(62)
Adjustments to other comprehensive income for purchase of noncontrolling interests							(3)
Balance,	(711)		(858)		(711)		(858)
Parent [Member] | Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(254)		(219)		(242)		(198)
Other comprehensive income (loss):
Currency translation adjustments	14		(47)		2		(64)
Tax expense
Other comprehensive income (loss) attributable to the parent company	14		(47)		2		(64)
Adjustments to other comprehensive income for purchase of noncontrolling interests							(4)
Balance,	(240)		(266)		(240)		(266)
Parent [Member] | Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	0		7		0		3
Other comprehensive income (loss):
Holding gains (losses)	1		(3)		1		2
Reclassification of amount to net income			(3)	[1]		[1]	(5)	[1]
Tax expense
Other comprehensive income (loss) attributable to the parent company	1		(6)		1		(3)
Adjustments to other comprehensive income for purchase of noncontrolling interests							1
Balance,	1		1		1		1
Parent [Member] | Investment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	3		13		3		12
Other comprehensive income (loss):
Holding gains (losses)	3		(2)		5		(1)
Reclassification of amount to net income			(8)	[1]	(2)	[1]	(8)	[1]
Tax expense
Other comprehensive income (loss) attributable to the parent company	3		(10)		3		(9)
Balance,	6		3		6		3
Parent [Member] | Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(481)		(602)		(488)		(610)
Other comprehensive income (loss):
Venezuelan bolivar devaluation					3		2
Amortization of net actuarial losses included in net periodic benefit cost	3	[2]	6	[2]	8	[2]	12	[2]
Tax expense					(1)
Other comprehensive income (loss) attributable to the parent company	3		6		10		14
Balance,	$ (478)		$ (596)		$ (478)		$ (596)

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

[2] See Note 9 for additional details.