Finance Receivables and Loans, Net (Schedule of Financing Receivables, Nonaccrual Status) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 1,379		$ 1,379		$ 1,388	$ 1,436	$ 1,439	$ 1,522
Financing receivable, nonaccrual, with no allowance	559		559			568
Financing receivable, nonaccrual, interest income	3	$ 3	6	$ 5
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,160		1,160		1,167	1,179	1,270	1,361
Financing receivable, nonaccrual, with no allowance	475		475			485
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,073		1,073		1,072	1,078	1,173	1,256
Financing receivable, nonaccrual, with no allowance	421		421			423
Consumer | Mortgage/Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	64		64		75	85	95	102
Financing receivable, nonaccrual, with no allowance	54		54			62
Consumer | Mortgage Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	42		42		51	59	63	67
Financing receivable, nonaccrual, with no allowance	33		33			39
Consumer | Mortgage - Legacy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	22		22		24	26	32	35
Financing receivable, nonaccrual, with no allowance	21		21			23
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	23		23		20	16	2	3
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	5		5		6	5	2	3
Financing receivable, nonaccrual, with no allowance	0		0			0
Consumer | Credit card receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	18		18		14	11	0	0
Financing receivable, nonaccrual, with no allowance	0		0			0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	219		219		221	257	169	161
Financing receivable, nonaccrual, with no allowance	84		84			83
Commercial | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	4		4		3	33	17	40
Financing receivable, nonaccrual, with no allowance	4		4			32
Commercial | Mortgage/Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1		1		1	3	2	5
Financing receivable, nonaccrual, with no allowance	1		1			3
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	214		214		$ 217	221	$ 150	$ 116
Financing receivable, nonaccrual, with no allowance	$ 79		$ 79			$ 48