Related Party Transactions (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Operating revenues and other income		$ 0	$ 0	$ 0
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Operating revenues and other income		89	98	107
Purchases		38	98	99
Operating expenses and selling, general and administrative expenses		65	60	59
Net interest (income) expense *	[1]	$ (13)	$ (14)	$ (13)

[1] <div>*We paid interest to, or received interest from, various affiliates. See Note 6—Investments, Loans and Long-Term Receivables, for additional information on loans to affiliated companies.</div>