Finance Receivables - Finance Receivables, net (Details) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan losses	$ (2,202)		$ (2,096)
Total finance receivables, net	79,005		74,514
Level 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	11,449		11,254
Level 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	66,754		62,150
Retail finance receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables, net of fees	69,722		65,322	$ 61,208
Less: allowance for loan losses	(2,166)	$ (2,123)	(2,062)	$ (1,987)	$ (1,884)	$ (1,839)
Total finance receivables, net	67,557		63,260
Commercial finance receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables, net of fees	11,485		11,288
Less: allowance for loan losses	(36)		(34)
Total finance receivables, net	11,449		11,254
Dealer cash management balances	$ 2,300		$ 1,900