Stockholders' Equity - Changes in AOCI of the Parent (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
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,					$ (793)
Other comprehensive income (loss):
Other comprehensive income (loss) attributable to the parent company	38		27		(24)		7
Adjustments to other comprehensive income for purchase of noncontrolling interests					(3)
Balance,	(820)				(820)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(858)		(670)		(793)		(650)
Other comprehensive income (loss):
Currency translation adjustments	30		25		(34)		(10)
Holding gains (losses)	3		4		4		9
Reclassification of amount to net income	(1)	[1]	1	[1]	(14)	[1]	7	[1]
Plan amendments			(6)				(6)
Venezuelan bolivar devaluation					2
Net actuarial loss							(1)
Amortization of net actuarial losses included in net periodic benefit cost	6	[2]	4	[2]	18	[2]	11	[2]
Tax expense			(1)				(3)
Other comprehensive income (loss) attributable to the parent company	38		27		(24)		7
Adjustments to other comprehensive income for purchase of noncontrolling interests					(3)
Balance,	(820)		(643)		(820)		(643)
Parent [Member] | Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(266)		(227)		(198)		(192)
Other comprehensive income (loss):
Currency translation adjustments	30		25		(34)		(10)
Tax expense
Other comprehensive income (loss) attributable to the parent company	30		25		(34)		(10)
Adjustments to other comprehensive income for purchase of noncontrolling interests					(4)
Balance,	(236)		(202)		(236)		(202)
Parent [Member] | Hedging
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	1		(2)		3		(10)
Other comprehensive income (loss):
Holding gains (losses)			4		2		8
Reclassification of amount to net income	(1)	[1]	1	[1]	(6)	[1]	7	[1]
Tax expense			(1)				(3)
Other comprehensive income (loss) attributable to the parent company	(1)		4		(4)		12
Adjustments to other comprehensive income for purchase of noncontrolling interests					1
Balance,	0		2		0		2
Parent [Member] | Investment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	3		11		12		10
Other comprehensive income (loss):
Holding gains (losses)	3				2		1
Reclassification of amount to net income		[1]		[1]	(8)	[1]		[1]
Tax expense
Other comprehensive income (loss) attributable to the parent company	3		0		(6)		1
Balance,	6		11		6		11
Parent [Member] | Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(596)		(452)		(610)		(458)
Other comprehensive income (loss):
Plan amendments			(6)				(6)
Venezuelan bolivar devaluation					2
Net actuarial loss							(1)
Amortization of net actuarial losses included in net periodic benefit cost	6	[2]	4	[2]	18	[2]	11	[2]
Tax expense
Other comprehensive income (loss) attributable to the parent company	6		(2)		20		4
Balance,	$ (590)		$ (454)		$ (590)		$ (454)

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

[2] See Note 9 for additional details.