Other Liabilities (Details 1) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Carrying amount of deferred charge card and other fees
Deferred card and other fees	$ 2,208	$ 1,996
Deferred direct acquisition costs	(282)	(280)
Reserves for membership cancellations	(167)	(162)
Total	$ 1,759	$ 1,554