Finance Receivables and Loans, Net (Schedule of Financing Receivables, Nonaccrual Status) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 1,404		$ 1,404		$ 1,384	$ 1,454	$ 1,388	$ 1,436
Financing receivable, nonaccrual, with no allowance	546		546			519
Financing receivable, nonaccrual, interest income	4	$ 3	7	$ 6
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,216		1,216		1,225	1,292	1,167	1,179
Financing receivable, nonaccrual, with no allowance	534		534			484
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,098		1,098		1,110	1,187	1,072	1,078
Financing receivable, nonaccrual, with no allowance	501		501			445
Consumer | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	52		52		49	49	75	85
Financing receivable, nonaccrual, with no allowance	33		33			39
Consumer | Mortgage Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	38		38		34	34	51	59
Financing receivable, nonaccrual, with no allowance	20		20			25
Consumer | Mortgage - Legacy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	14		14		15	15	24	26
Financing receivable, nonaccrual, with no allowance	13		13			14
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	66		66		66	56	20	16
Financing receivable, nonaccrual, with no allowance	0		0			0
Consumer | Personal Lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	11		11		12	13	6	5
Financing receivable, nonaccrual, with no allowance	0		0			0
Consumer | Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	55		55		54	43	14	11
Financing receivable, nonaccrual, with no allowance	0		0			0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	188		188		159	162	221	257
Financing receivable, nonaccrual, with no allowance	12		12			35
Commercial | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	24		24		0	5	3	33
Financing receivable, nonaccrual, with no allowance	7		7			2
Commercial | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	3		3		0	0	1	3
Financing receivable, nonaccrual, with no allowance	0		0			0
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	161		161		$ 159	157	$ 217	$ 221
Financing receivable, nonaccrual, with no allowance	$ 5		$ 5			$ 33