Finance Receivables and Loans, Net (Schedule of Financing Receivables, Nonaccrual Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 1,436	$ 1,522	$ 1,036
Financing receivable, nonaccrual, with no allowance	568	706
Financing receivable, nonaccrual, interest income	13	8
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,179	1,361	821
Financing receivable, nonaccrual, with no allowance	485	650
Consumer | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	1,078	1,256	762
Financing receivable, nonaccrual, with no allowance	423	604
Consumer | Mortgage/Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	85	102	57
Financing receivable, nonaccrual, with no allowance	62	46
Consumer | Mortgage Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	59	67	17
Financing receivable, nonaccrual, with no allowance	39	18
Consumer | Mortgage - Legacy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	26	35	40
Financing receivable, nonaccrual, with no allowance	23	28
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	16	3	2
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	5	3
Financing receivable, nonaccrual, with no allowance	0
Consumer | Credit card receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	11	0
Financing receivable, nonaccrual, with no allowance	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	257	161	215
Financing receivable, nonaccrual, with no allowance	83	56
Commercial | Automotive
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	33	40	73
Financing receivable, nonaccrual, with no allowance	32	10
Commercial | Mortgage/Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	3	5	4
Financing receivable, nonaccrual, with no allowance	3	5
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status	221	116	$ 138
Financing receivable, nonaccrual, with no allowance	$ 48	$ 41