Properties and Equipment, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 360	$ 677
Accumulated depreciation and amortization		(320)	(533)
Properties and equipment, net	[1]	40	144
Depreciation and amortization		22	34	$ 43
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross		2	5
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross		291	543
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 67	129
Retail branch properties | Corporate Center
Property, Plant and Equipment [Line Items]
Gain on sale of certain owned retail branch properties			$ 18

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31,20212020(in millions)AssetsLoans$46 $10 Other assets55 79 Total assets$101 $89 LiabilitiesInterest, taxes and other liabilities$9 $10 Total liabilities$9 $10