Finance Receivables and Loans, Net (Schedule of Accounts, Notes, Loans and Financing Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	$ 135,748	$ 122,268
Unamortized premiums and discounts and deferred fees and costs	2,300	2,300
Accrued interest receivable	707	514
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	106,610	98,226
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	83,286	78,252
Consumer | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	19,735	18,012
Consumer | Mortgage Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	19,445	17,644
Interest-only mortgage loans	3	5
Consumer | Mortgage - Legacy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	290	368
Interest-only mortgage loans	17	21
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	3,589	1,962
Fair value, option, carrying amount, financing receivable, no allowance	3	7	$ 8
Consumer | Personal Lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	1,990	1,009
Consumer | Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	1,599	953
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	29,138	24,042
Commercial | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	14,595	12,229
Commercial | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	5,389	4,939
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables and loans	$ 9,154	$ 6,874