Expenses - Schedule of Expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other Expenses [Abstract]
Professional services	$ 92	$ 91	$ 273	$ 246
Sales advertising and public relations	28	13	69	46
Securities processing	21	8	41	22
Regulatory fees and assessments	19	16	63	53
Bank operations	11	3	24	7
Donations	7	0	20	1
Other	96	90	289	267
Total other expenses	$ 274	$ 221	$ 779	$ 642