Reserves for Credit Losses (Details 2) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reserve for Losses [Roll Forward]
Provisions for credit losses	$ 1,055,000,000	$ (33,000,000)
Card Member Receivables
Reserve for Losses [Roll Forward]
Beginning Balance	229,000,000	64,000,000
Provisions for credit losses	222,000,000	80,000,000
Net write-offs	(230,000,000)	(67,000,000)
Other	2,000,000	(1,000,000)
Ending Balance	223,000,000	76,000,000
Recoveries	69,000,000	67,000,000
Foreign currency translation adjustments	$ 2,000,000	$ 0