Debt (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt		$ 34	$ 27
Short-term borrowings, including amounts due to affiliates	[1]	73	68
Total		$ 107	$ 118
Weighted average interest rate, short-term borrowings		2.90%	3.10%
Bank Loans Acquired from SOFTER [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Short-term Bank Loans and Notes Payable	[2]	$ 0	$ 23
Weighted average interest rate, short-term borrowings			1.20%
Secured Debt [Member] | Accounts Receivable Securitization Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Borrowings outstanding		$ 0

[1] The weighted average interest rate was 2.9% and 3.1% as of March 31, 2017 and December 31, 2016, respectively.

[2] The weighted average interest rate was 1.2% as of December 31, 2016.