Finance Receivables - Schedule of Finance Receivables, Net (Details) - USD ($) $ in Millions	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: allowance for loan losses	$ (2,311)		$ (2,344)
Total finance receivables, net	88,151		84,637
Level 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	17,078		14,216
Level 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value utilizing inputs	71,552		70,911
Retail finance receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	73,335		72,729	$ 69,722
Less: allowance for loan losses	(2,261)	$ (2,320)	(2,308)	$ (2,166)	$ (2,123)	$ (2,062)
Total finance receivables, net	71,074		70,421
Commercial finance receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	17,127		14,251
Less: allowance for loan losses	(50)		(36)
Total finance receivables, net	17,078		14,216
Dealer cash management balances	3,000		2,600
Commercial finance receivables | Dealer Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	16,301		13,422
Commercial finance receivables | Other Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables	$ 826		$ 830