Other Liabilities (Details 1) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Carrying amount of deferred charge card and other fees
Deferred card and other fees	$ 2,639	$ 2,532
Deferred direct acquisition costs	(166)	(270)
Reserves for membership cancellations	(191)	(200)
Total	$ 2,282	$ 2,062