Finance Receivables and Loans, Net (Schedule of Financing Receivables, Nonaccrual Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 1,394	$ 1,454	$ 1,436
Financing receivable, nonaccrual, with no allowance	585	519
Financing receivable, nonaccrual, interest income	16	13
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,275	1,292	1,179
Financing receivable, nonaccrual, with no allowance	564	484
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,129	1,187	1,078
Financing receivable, nonaccrual, with no allowance	531	445
Consumer | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	54	49	85
Financing receivable, nonaccrual, with no allowance	33	39
Consumer | Mortgage Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	41	34	59
Financing receivable, nonaccrual, with no allowance	21	25
Consumer | Mortgage — Legacy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	13	15	26
Financing receivable, nonaccrual, with no allowance	12	14
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	92	56	16
Financing receivable, nonaccrual, with no allowance	0	0
Consumer | Personal Lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	0	13	5
Financing receivable, nonaccrual, with no allowance	0	0
Consumer | Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	92	43	11
Financing receivable, nonaccrual, with no allowance	0	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	119	162	257
Financing receivable, nonaccrual, with no allowance	21	35
Commercial | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	18	5	33
Financing receivable, nonaccrual, with no allowance	13	2
Commercial | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	3	0	3
Financing receivable, nonaccrual, with no allowance	3	0
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	98	157	$ 221
Financing receivable, nonaccrual, with no allowance	$ 5	$ 33