Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Finance receivables, net	$ 105,070	$ 114,317
Financing Receivable, Allowance for Credit Loss	1,305	513	$ 589
Charge-offs	(470)	(549)
Recoveries	169	178
Provision for credit losses	828	296
Other	13	(1)
Financing Receivable, Gross	106,375	114,830
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	792
Translation [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss	252
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss	1,245	496	566
Charge-offs	(441)	(527)
Recoveries	161	168
Provision for credit losses	771	291
Other	11	(2)
Financing Receivable, Gross	78,170
Non-Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss	60	17	$ 23
Charge-offs	(29)	(22)
Recoveries	8	10
Provision for credit losses	57	5
Other	2	1
Financing Receivable, Gross	28,205	40,855
Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Finance receivables, net	252	0
Accounting Standards Update 2016-13 [Member] | Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Finance receivables, net	247	0
Accounting Standards Update 2016-13 [Member] | Non-Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Finance receivables, net	$ 5	$ 0