Customer Deposits (Details 1) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Deposits, by Type
Savings and transaction accounts	$ 84,200	$ 76,731
Certificates of deposit:
Direct	4,102	2,765
Third-party (brokered)	15,736	13,331
Sweep accounts – Third-party (brokered)	15,799	16,297
Other deposits	63	71
Card Member credit balances	906	1,044
Total customer deposits	$ 120,806	$ 110,239