Service Fees and Other Revenue and Other Expenses (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Service Fees and Other Revenue and Other Expenses [Abstract]
Data processing and equipment	$ 660	$ 600
Professional services	440	472
Net unrealized and realized losses on Amex Ventures investments	95	11
Other	367	315
Total Other expenses	$ 1,562	$ 1,398