Service Fees and Other Revenue and Other Expenses (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Service Fees and Other Revenue and Other Expenses [Abstract]
Data processing and equipment	$ 677	$ 623	$ 1,337	$ 1,223
Professional services	467	501	907	973
Net unrealized and realized losses on Amex Ventures investments	11	10	106	21
Other	391	317	758	632
Total Other expenses	$ 1,546	$ 1,451	$ 3,108	$ 2,849