Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Affordable housing tax credit and other unconsolidated investments	$ 762	$ 169
Income tax receivable	275	799
Bank-owned life insurance	586	116
Right of use assets for operating leases, net	345	64
Pension assets	343	289
Accrued interest receivable	329	134
Counterparty receivables	98	0
Federal Home Loan Bank stock	197	40
Fair value of derivative financial instruments	159	3
Nonmarketable equity securities	58	1
Other real estate owned	47	40
Mortgage servicing assets	25	23	$ 18	$ 23
Other	1,145	177
Total other assets	4,369	$ 1,855
Other Assets [Line Items]
BOLI, amount surrendered	1,250
BOLI, cash settled	157
Bank Owned Life Insurance
Other Assets [Line Items]
BOLI, amount surrendered	483
Other
Other Assets [Line Items]
BOLI, amount surrendered	$ 607