Other Assets (Schedule of Other Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Assets [Abstract]
Property and equipment at cost	$ 2,390	$ 2,352
Accumulated depreciation	(1,116)	(1,076)
Net property and equipment	1,274	1,276
Investment in qualified affordable housing projects	1,616	1,596
Net deferred tax assets	1,030	1,087
Nonmarketable equity investments	833	842
Goodwill	822	822	$ 822
Accrued interest, fees, and rent receivables	807	786
Restricted cash held for securitization trusts	740	585
Equity-method investments	595	608
Other accounts receivable	153	164
Operating lease right-of-use assets	105	111
Net intangible assets	91	98
Restricted cash and cash equivalents	75	66
Other assets	1,003	1,097
Total other assets	$ 9,144	$ 9,138
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total other assets	Total other assets