Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Customer and other miscellaneous receivables	$ 494	$ 480
Collateral held for resale, at net realizable value	383	316
Deferred and refundable income taxes	142	191
Property and equipment, net	135	128
Other	138	153
Total Other assets	$ 1,292	$ 1,268