Fair Value of Financial Assets and Liabilities - Recurring (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Assets:
Interest Rate Derivatives, at Fair Value, Net	[1]	$ 4	$ 7
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Interest Rate Derivatives, at Fair Value, Net		4	7
Deferred compensation investments in mutual funds		15	13
Total		107	75
Liabilities:
Foreign exchange contracts - forwards		39	10
Deferred compensation plan liabilities		17	15
Total		56	26
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Foreign exchange contracts - forwards [Member]
Assets:
Foreign exchange contracts - forwards		88	55
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Options Held [Member]
Liabilities:
Foreign exchange contracts - forwards		$ 0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Currency Swap [Member]
Liabilities:
Foreign exchange contracts - forwards			$ 1

[1] Fair value adjustments include the following: (i) fair value adjustments to debt associated with terminated interest rate swaps, which are being amortized to interest expense over the remaining term of the related notes; and (ii) changes in fair value of hedged debt obligations attributable to movements in benchmark interest rates. Hedge accounting requires hedged debt instruments to be reported inclusive of any fair value adjustment.