Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restructuring and other asset-related charges	$ 0	$ 0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets: [Abstract]
Deposits held in money market mutual funds	5		$ 5
Foreign exchange contracts	0		0
Total	5		5
Liabilities: [Abstract]
Foreign exchange contracts	0		0
Total	0		0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets: [Abstract]
Deposits held in money market mutual funds	0		0
Foreign exchange contracts	12		19
Total	12		19
Liabilities: [Abstract]
Foreign exchange contracts	1		2
Total	1		2
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3)
Assets: [Abstract]
Deposits held in money market mutual funds	0		0
Foreign exchange contracts	0		0
Total	0		0
Liabilities: [Abstract]
Foreign exchange contracts	0		0
Total	0		0
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Assets: [Abstract]
Deposits held in money market mutual funds	5		5
Foreign exchange contracts	12		19
Total	17		24
Liabilities: [Abstract]
Foreign exchange contracts	1		2
Total	$ 1		$ 2