Stockholders' Equity - Changes in AOCI of the Parent (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	$ (997)
Other comprehensive income (loss):
Other comprehensive loss attributable to the parent company	(83)		(5)
Balance,	(1,080)
Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	(997)		(727)
Other comprehensive income (loss):
Currency translation adjustments	(101)		(12)
Holding gain on net investment hedge	2
Holding gains and losses	(5)		2
Reclassification of amount to net income	5	[1]	(2)	[1]
Venezuelan bolivar devaluation			3
Reclassification adjustment for net actuarial losses included in net periodic benefit cost	6	[2]	5	[2]
Elimination of net prior service costs and actuarial losses of disposal group	10
Tax expense			(1)
Other comprehensive loss attributable to the parent company	(83)		(5)
Balance,	(1,080)		(732)
Parent [Member] | Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	(427)		(242)
Other comprehensive income (loss):
Currency translation adjustments	(101)		(12)
Holding gain on net investment hedge	2
Tax expense
Other comprehensive loss attributable to the parent company	(99)		(12)
Balance,	(526)		(254)
Parent [Member] | Hedging [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	(9)		0
Other comprehensive income (loss):
Holding gains and losses	(6)
Reclassification of amount to net income	5	[1]		[1]
Tax expense
Other comprehensive loss attributable to the parent company	(1)		0
Balance,	(10)		0
Parent [Member] | Investment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	5		3
Other comprehensive income (loss):
Holding gains and losses	1		2
Reclassification of amount to net income		[1]	(2)	[1]
Tax expense
Other comprehensive loss attributable to the parent company	1		0
Balance,	6		3
Parent [Member] | Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance,	(566)		(488)
Other comprehensive income (loss):
Venezuelan bolivar devaluation			3
Reclassification adjustment for net actuarial losses included in net periodic benefit cost	6	[2]	5	[2]
Elimination of net prior service costs and actuarial losses of disposal group	10
Tax expense			(1)
Other comprehensive loss attributable to the parent company	16		7
Balance,	$ (550)		$ (481)

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

[2] See Note 8 for additional details.