Fair Value (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Assets:
Total	$ 661	$ 674
Level 1 [Member] | Interest rate swap [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	0
Level 1 [Member] | Forward contracts [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	0
Liabilities:
Derivative Financial Instruments, Liabilities	0
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total	0
Level 2 [Member] | Interest rate swap [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	16
Level 2 [Member] | Forward contracts [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	18
Liabilities:
Derivative Financial Instruments, Liabilities	1
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total	34
Level 3 [Member] | Interest rate swap [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	0
Level 3 [Member] | Forward contracts [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	0
Liabilities:
Derivative Financial Instruments, Liabilities	0
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total	0
Interest rate swap [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	16
Forward contracts [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Derivative Financial Instruments, Assets	18
Liabilities:
Derivative Financial Instruments, Liabilities	1
Fair Value, Measurements, Recurring [Member]
Assets:
Total	$ 34