Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Payments:
Interest	$ 869	$ 465	$ 825
Income taxes	272	607	491
Transfers:
Portfolio loans and leases to loans and leases held for sale	105	447	926
Loans and leases held for sale to portfolio loans and leases	409	49	49
Portfolio loans and leases to OREO	8	8	12
Loans and leases held for sale to OREO	1	0	2
Bank premises and equipment to OREO	24	21	2
Supplemental Disclosures:
Net additions to lease liabilities under operating leases	152	66	47
Net additions to lease liabilities under finance leases	$ 27	35	106
Residential mortgage loans \| GNMA loans
Transfers:
Portfolio loans and leases to loans and leases held for sale		$ 167	$ 794

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