Stockholders' Equity - Changes in Each Component of AOCI of the Parent (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,				$ (997)
Other comprehensive income (loss):
Other comprehensive income (loss) attributable to the parent company		$ 23	$ 21	(60)	$ 16
Balance,		(1,057)		(1,057)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,		(526)	(254)	(427)	(242)
Other comprehensive income (loss):
Currency translation adjustments		18	14	(83)	$ 2
Holding gains and losses on net investment hedge		(4)		(2)
Tax expense
Other comprehensive income (loss) attributable to the parent company		14	14	(85)	$ 2
Balance,		(512)	(240)	(512)	(240)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,		(10)	0	(9)	0
Other comprehensive income (loss):
Holding gains and losses		(3)	1	(9)	$ 1
Reclassification of amount to net income	[1]	6		11
Tax expense
Other comprehensive income (loss) attributable to the parent company		3	1	2	$ 1
Balance,		(7)	1	(7)	1
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,		6	3	$ 5	3
Other comprehensive income (loss):
Holding gains and losses		$ (1)	3		5
Reclassification of amount to net income	[1]				$ (2)
Tax expense
Other comprehensive income (loss) attributable to the parent company		$ (1)	3	$ 0	$ 3
Balance,		5	6	5	6
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,		(550)	(481)	(566)	(488)
Other comprehensive income (loss):
Venezuelan bolivar devaluation					3
Reclassification adjustment for net actuarial losses included in net periodic benefit cost	[2]	7	3	13	8
Elimination of net prior service costs and actuarial losses of disposal group				10
Tax expense					(1)
Other comprehensive income (loss) attributable to the parent company		7	3	23	10
Balance,		(543)	(478)	(543)	(478)
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance,		(1,080)	(732)	(997)	(727)
Other comprehensive income (loss):
Currency translation adjustments		18	14	(83)	2
Holding gains and losses on net investment hedge		(4)		(2)
Holding gains and losses		(4)	4	(9)	6
Reclassification of amount to net income	[1]	6		11	(2)
Venezuelan bolivar devaluation					3
Reclassification adjustment for net actuarial losses included in net periodic benefit cost	[2]	7	3	13	8
Elimination of net prior service costs and actuarial losses of disposal group				10
Tax expense					(1)
Other comprehensive income (loss) attributable to the parent company		23	21	(60)	16
Balance,		$ (1,057)	$ (711)	$ (1,057)	$ (711)

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

[2] See Note 8 for additional details.