Stockholders' Equity - Changes in AOCI of the Parent (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,					$ (793)
Other comprehensive income (loss):
Other comprehensive income (loss)	(57)		(76)		(62)		(20)
Adjustments to accumulated other comprehensive income					(3)
Balance,	(858)				(858)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(801)		(594)		(793)		(650)
Other comprehensive income (loss):
Currency translation adjustments	(47)		(79)		(64)		(35)
Holding gains (losses)	(5)		(5)		1		5
Reclassification of amount to net income	(11)	[1]	4	[1]	(13)	[1]	6	[1]
Venezuelan bolivar devaluation					2
Net actuarial loss							(1)
Amortization of net actuarial losses included in net periodic benefit cost	6	[2]	4	[2]	12	[2]	7	[2]
Tax expense							(2)
Other comprehensive income (loss)	(57)		(76)		(62)		(20)
Adjustments to accumulated other comprehensive income					(3)
Balance,	(858)		(670)		(858)		(670)
Parent [Member] | Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(219)		(148)		(198)		(192)
Other comprehensive income (loss):
Currency translation adjustments	(47)		(79)		(64)		(35)
Tax expense
Other comprehensive income (loss)	(47)		(79)		(64)		(35)
Adjustments to accumulated other comprehensive income					(4)
Balance,	(266)		(227)		(266)		(227)
Parent [Member] | Hedging
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	7		(2)		3		(10)
Other comprehensive income (loss):
Holding gains (losses)	(3)		(4)		2		4
Reclassification of amount to net income	(3)	[1]	4	[1]	(5)	[1]	6	[1]
Tax expense							(2)
Other comprehensive income (loss)	(6)		0		(3)		8
Adjustments to accumulated other comprehensive income					1
Balance,	1		(2)		1		(2)
Parent [Member] | Investment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	13		12		12		10
Other comprehensive income (loss):
Holding gains (losses)	(2)		(1)		(1)		1
Reclassification of amount to net income	(8)	[1]			(8)	[1]
Tax expense
Other comprehensive income (loss)	(10)		(1)		(9)		1
Balance,	3		11		3		11
Parent [Member] | Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(602)		(456)		(610)		(458)
Other comprehensive income (loss):
Venezuelan bolivar devaluation					2
Net actuarial loss							(1)
Amortization of net actuarial losses included in net periodic benefit cost	6	[2]	4	[2]	12	[2]	7	[2]
Tax expense
Other comprehensive income (loss)	6		4		14		6
Balance,	$ (596)		$ (452)		$ (596)		$ (452)

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

[2] See Note 9 for additional details.