Finance Receivables, Net - Allowance for Credit Losses (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Finance receivables lease portfolio average maturity - low - years		2 years
Finance receivable lease portfolio average maturity - high - years		3 years
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses		$ 108	$ 110	[1]
Provision		24	17
Charge-offs		(41)	(28)
Recoveries and other	[2]	1	9
Financing Receivable, Allowance for Credit Losses		92	108
Financing Receivable, Collectively Evaluated for Impairment	[3]	3,564	3,860
United States
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses		56	55	[1]
Provision		12	11
Charge-offs		(17)	(12)
Recoveries and other	[2]	2	2
Financing Receivable, Allowance for Credit Losses		53	56
Financing Receivable, Collectively Evaluated for Impairment	[3]	1,932	2,029
Canada
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses		15	16	[1]
Provision		3	2
Charge-offs		(6)	(5)
Recoveries and other	[2]	0	2
Financing Receivable, Allowance for Credit Losses		12	15
Financing Receivable, Collectively Evaluated for Impairment	[3]	335	397
Europe
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses		35	37	[1]
Provision		9	4
Charge-offs		(18)	(11)
Recoveries and other	[2]	(1)	5
Financing Receivable, Allowance for Credit Losses		25	35
Financing Receivable, Collectively Evaluated for Impairment	[3]	1,239	1,362
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	[4]	2	2	[1]
Provision	[4]	0	0
Charge-offs	[4]	0	0
Recoveries and other	[2],[4]	0	0
Financing Receivable, Allowance for Credit Losses	[4]	2	2
Financing Receivable, Collectively Evaluated for Impairment	[3],[4]	$ 58	$ 72

[1] In the first quarter 2016, as a result of an internal reorganization, a U.S. leasing unit previously classified as Other was reclassified to the U.S. Prior year amounts have been reclassified to conform to current year presentation.

[2] Includes the impacts of foreign currency translation and adjustments to reserves necessary to reflect events of non-payment such as customer accommodations and contract terminations.

[3] Total Finance receivables exclude the allowance for credit losses of $92 and $108 at December 31, 2018 and 2017, respectively.

[4] Includes developing market countries and smaller units.