Other Assets (Schedule of Other Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Property and equipment at cost	$ 2,153	$ 2,352
Accumulated depreciation	(871)	(1,076)
Net property and equipment	1,282	1,276
Investment in qualified affordable housing projects	1,866	1,596
Net deferred tax assets	1,224	1,087
Accrued interest, fees, and rent receivables	935	786
Nonmarketable equity investments	886	842
Goodwill	669	822	$ 822
Equity-method investments	651	608
Restricted cash held for securitization trusts	407	585
Other accounts receivable	189	164
Operating lease right-of-use assets	90	111
Restricted cash and cash equivalents	87	66
Net intangible assets	73	98
Other assets	1,036	1,097
Total other assets	$ 9,395	$ 9,138
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total other assets	Total other assets
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Property, plant and equipment, disposals	$ 295
Disposals, accumulated depreciation	$ 295