Finance Receivables - Allowance for Loan Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 1,978
Balance at end of period	1,886	$ 1,978
Retail Finance Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	1,915	866	$ 844
Provision for loan losses	267	880	690
Charge-offs	(897)	(1,149)	(1,218)
Recoveries	571	537	548
Foreign currency translation	(17)	(20)	2
Balance at end of period	1,839	1,915	$ 866
Retail Finance Receivables | Cumulative Effect, Period of Adopt
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 801
Balance at end of period		$ 801