Debt (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions		Dec. 31, 2019		Dec. 31, 2018
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Current installments of long-term debt		$ 28		$ 367
Short-term borrowings, including amounts due to affiliates	[1]	81		77
Total		$ 496		$ 561
Weighted average interest rate, short-term borrowings		2.30%		3.20%
Revolving Credit Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Line of Credit, Current	[2]	$ 272	[3]	$ 40
Weighted average interest rate, short-term borrowings		1.60%		6.00%
Accounts Receivable Securitization Facility [Member]
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates
Line of Credit, Current	[4]	$ 115	[5]	$ 77
Weighted average interest rate, short-term borrowings		2.40%		3.10%

[1] The weighted average interest rate was 2.3% and 3.2% as of December 31, 2019 and 2018, respectively.

[2] The weighted average interest rate was 1.6% and 6.0% as of December 31, 2019 and 2018, respectively.

[3] The Company borrowed $1.3 billion and repaid $1.1 billion under its senior unsecured revolving credit facility during the year ended December 31, 2019.

[4] The weighted average interest rate was 2.4% and 3.1% as of December 31, 2019 and 2018, respectively.

[5] The Company borrowed $112 million and repaid $74 million under this facility during the year ended December 31, 2019