Supplementary Financial Information - Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Financial Information [Abstract]
Cash and cash equivalents	$ 1,840	$ 2,625
Litigation deposits in Brazil	34	42
Escrow and cash collections related to secured borrowing arrangements	32	22
Other restricted cash	3	2
Total Restricted Cash	69	66
Cash, cash equivalents and restricted cash	$ 1,909	$ 2,691	$ 2,795	$ 1,148