Finance Receivables and Loans, Net (Schedule of Financing Receivables, Nonaccrual Status) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 1,501		$ 1,501		$ 1,404	$ 1,454	$ 1,379	$ 1,436
Financing receivable, nonaccrual, with no allowance	570		570			519
Financing receivable, nonaccrual, interest income	4	$ 3	11	$ 9
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,242		1,242		1,216	1,292	1,160	1,179
Financing receivable, nonaccrual, with no allowance	548		548			484
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,110		1,110		1,098	1,187	1,073	1,078
Financing receivable, nonaccrual, with no allowance	519		519			445
Consumer | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	46		46		52	49	64	85
Financing receivable, nonaccrual, with no allowance	29		29			39
Consumer | Mortgage Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	33		33		38	34	42	59
Financing receivable, nonaccrual, with no allowance	17		17			25
Consumer | Mortgage — Legacy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	13		13		14	15	22	26
Financing receivable, nonaccrual, with no allowance	12		12			14
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	86		86		66	56	23	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	14		14		11	13	5	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	72		72		55	43	18	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	259		259		188	162	219	257
Financing receivable, nonaccrual, with no allowance	22		22			35
Commercial | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	97		97		24	5	4	33
Financing receivable, nonaccrual, with no allowance	16		16			2
Commercial | Consumer mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	3		3		3	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	159		159		$ 161	157	$ 214	$ 221
Financing receivable, nonaccrual, with no allowance	$ 6		$ 6			$ 33