Derivatives and Hedging Instruments - Derivative Fair Values (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Currency Exposure, Number of Functional Currencies	50
Maximum Period For Cash Flow Hedging Activity	15
Derivative Assets, Fair Value	$ 0	$ 9
Derivative Liabilities, Fair Value	5	3
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	3	(5)
Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	3
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Accounts Receivable [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	0	96
Derivative Assets, Fair Value	0	7
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	115	105
Derivative Liabilities, Fair Value	4	2
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Accounts Receivable [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	43	79
Derivative Assets, Fair Value	0	2
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	86	70
Derivative Liabilities, Fair Value	1	1
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	0	7
Derivative Liabilities, Fair Value	4	2
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	0	2
Derivative Liabilities, Fair Value	$ 1	$ 1