Stockholders' Equity - Changes in AOCI of the Parent (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	$ (793)
Other comprehensive income (loss):
Other comprehensive income (loss)	(5)		56
Adjustments to other comprehensive income for purchase of noncontrolling interests	(3)
Balance,	(801)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(793)		(650)
Other comprehensive income (loss):
Currency translation adjustments	(17)		44
Holding gains	6		10
Reclassification of amount to net income	(2)	[1]	2	[1]
Venezuelan bolivar devaluation	2
Net actuarial loss			(1)
Amortization of net actuarial losses included in net periodic benefit cost	6	[2]	3	[2]
Tax expense			(2)
Other comprehensive income (loss)	(5)		56
Adjustments to other comprehensive income for purchase of noncontrolling interests	(3)
Balance,	(801)		(594)
Parent [Member] | Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(198)		(192)
Other comprehensive income (loss):
Currency translation adjustments	(17)		44
Tax expense
Other comprehensive income (loss)	(17)		44
Adjustments to other comprehensive income for purchase of noncontrolling interests	(4)
Balance,	(219)		(148)
Parent [Member] | Hedging
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	3		(10)
Other comprehensive income (loss):
Holding gains	5		8
Reclassification of amount to net income	(2)	[1]	2	[1]
Tax expense			(2)
Other comprehensive income (loss)	3		8
Adjustments to other comprehensive income for purchase of noncontrolling interests	1
Balance,	7		(2)
Parent [Member] | Investment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	12		10
Other comprehensive income (loss):
Holding gains	1		2
Tax expense
Other comprehensive income (loss)	1		2
Balance,	13		12
Parent [Member] | Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(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]	3	[2]
Tax expense
Other comprehensive income (loss)	8		2
Balance,	$ (602)		$ (456)

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

[2] See Note 9 for additional details.