Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Cash Payments:
Interest	$ 682	$ 158
Income taxes	21	11
Transfers:
Portfolio loans and leases to loans and leases held for sale	3	71
Loans and leases held for sale to portfolio loans and leases	4	402
Portfolio loans and leases to OREO	3	2
Bank premises and equipment to OREO	8	15
Supplemental Disclosures:
Net additions to lease liabilities under operating leases	1	31
Net additions to lease liabilities under finance leases	$ 0	$ 3

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