Other Assets (Schedule of Other Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Assets [Abstract]
Property and equipment at cost	$ 2,139	$ 1,541
Accumulated depreciation	(955)	(815)
Net property and equipment	1,184	726
Investment in qualified affordable housing projects	1,378	1,095
Nonmarketable equity investments	998	915
Goodwill	822	343	$ 393
Accrued interest, fees, and rent receivables	600	704
Restricted cash held for securitization trusts	516	875
Equity-method investments	472	320
Net deferred tax assets	254	94
Operating lease right-of-use assets	148	162
Net intangible assets	129	50
Other accounts receivable	127	166
Restricted cash and cash equivalents	92	78
Other assets	1,337	887
Total other assets	$ 8,057	$ 6,415
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Total other assets	Total other assets