Derivatives and Hedging Instruments - Derivative Fair Values (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	$ 2	$ 2
Derivative Liabilities, Fair Value	8	11
Interest Rate Swap Ending Notional	341
Derivatives designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	1	1
Derivative Liabilities, Fair Value	8	10
Derivatives not designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	1	1
Derivative Liabilities, Fair Value	0	1
Interest Rate Swap [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
Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	0	0
Derivative Assets, Fair Value	0	0
Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member] | Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value	4	3
Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member] | Other current liabilities and other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	476	518
Derivative Liabilities, Fair Value	7	10
Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member] | Other noncurrent liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value	3	7
Foreign Exchange Derivative [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	0
Foreign Exchange Derivative [Member] | Derivatives designated as hedging instrument [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	31	103
Derivative Assets, Fair Value	1	1
Foreign Exchange Derivative [Member] | Derivatives designated as hedging instrument [Member] | Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	33	0
Derivative Liabilities, Fair Value	1	0
Foreign Exchange Derivative [Member] | Derivatives not designated as hedging instrument [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	187	162
Derivative Assets, Fair Value	1	1
Foreign Exchange Derivative [Member] | Derivatives not designated as hedging instrument [Member] | Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	232	158
Derivative Liabilities, Fair Value	$ 0	$ 1