Accounts Receivable, Net (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Net		$ 985		$ 961
Accounts Receivable Sales Arrangements [Abstract]
Remaining account receivable sold and derecognized		473		531
Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Invoiced		661		651
Accrued		380		374
Allowance for doubtful accounts		(56)		(64)
Accounts receivable sales		511	$ 592
Deferred proceeds		52	71
Loss on sales of accounts receivable		3	4
Estimated (decrease) increase to operating cash flows(1)	[1]	(65)	$ 26
Other Current Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred proceeds		$ 53		$ 48

[1] Represents the difference between current and prior period receivable sales adjusted for the effects of: (i) the deferred proceeds, (ii) collections prior to the end of the quarter and, (iii) currency.