Investments in Affiliates (Schedule of Balances with Affiliates) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Trade receivables		$ 0	$ 1
Non-trade receivables		22	35
Total due from affiliates		22	36
Short-term borrowings	[1]	58	67
Trade payables		38	43
Current Other liabilities		9	10
Total due to affiliates		$ 105	$ 120

[1] The Company has agreements with certain affiliates whereby excess affiliate cash is lent to and managed by the Company at variable interest rates governed by those agreements.