Service Fees and Other Revenue and Other Expenses (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Service Fees and Other Revenue and Other Expenses [Abstract]
Data processing and equipment	$ 651	$ 613	$ 1,874	$ 1,772
Professional services	500	490	1,473	1,351
Net unrealized and realized losses (gains) on Amex Ventures investments	47	(142)	68	(773)
Other	376	257	1,008	745
Total Other expenses	$ 1,574	$ 1,218	$ 4,423	$ 3,095