Debt (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt		$ 59	$ 27
Short-term borrowings, including amounts due to affiliates	[1]	75	68
Total		$ 435	$ 118
Weighted average interest rate, short-term borrowings		3.00%	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%
Revolving Credit Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Weighted average interest rate, short-term borrowings		2.70%
Accounts Receivable Securitization Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Borrowings outstanding	[3]	$ 81	$ 0
Weighted average interest rate, short-term borrowings		2.00%
Secured Debt [Member] | Accounts Receivable Securitization Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Borrowings outstanding	[4]	$ 81
Revolving Credit Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Borrowings outstanding	[5]	220	$ 0
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Borrowings outstanding	[6]	$ 220

[1] The weighted average interest rate was 3.0% and 3.1% as of September 30, 2017 and December 31, 2016, respectively.

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

[3] The weighted average interest rate was 2.0% as of September 30, 2017.

[4] The Company borrowed $85 million and repaid $4 million under its Accounts Receivable Securitization Facility during the nine months ended September 30, 2017.

[5] The weighted average interest rate was 2.7% as of September 30, 2017.

[6] The Company borrowed $451 million and repaid $231 million under its senior unsecured revolving credit facility during the nine months ended September 30, 2017.