Expenses - Schedule of Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Expenses [Abstract]
Regulatory fees and assessments	$ 464	$ 83	$ 69
Professional services	428	375	334
Sales advertising and public relations	142	99	73
Securities processing	49	63	34
Bank operations	45	41	12
Donations	27	27	2
Other	374	387	372
Total other expenses	1,529	$ 1,075	$ 896
FDIC special assessment, recovery of estimated losses	$ 387