Finance Receivables, Net - Allowance for Credit Losses (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
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		$ 110	$ 118	[1]
Provision		17	24
Charge-offs		(28)	(35)
Recoveries and other	[2]	9	3
Financing Receivable, Allowance for Credit Losses		108	110
Financing Receivable, Collectively Evaluated for Impairment	[3]	3,860	3,854
Allowance for credit losses not included in the impairment evaluation		108	110
United States
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	[1]	55	54
Provision		11	10
Charge-offs		(12)	(12)
Recoveries and other	[2]	2	3
Financing Receivable, Allowance for Credit Losses		56	55	[1]
Financing Receivable, Collectively Evaluated for Impairment	[3]	2,029	2,138
Canada
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses		16	17	[1]
Provision		2	3
Charge-offs		(5)	(8)
Recoveries and other	[2]	2	4
Financing Receivable, Allowance for Credit Losses		15	16
Financing Receivable, Collectively Evaluated for Impairment	[3]	397	378
Europe
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses		37	45	[1]
Provision		4	11
Charge-offs		(11)	(15)
Recoveries and other	[2]	5	(4)
Financing Receivable, Allowance for Credit Losses		35	37
Financing Receivable, Collectively Evaluated for Impairment	[3]	1,362	1,286
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Allowance for Credit Losses	[1],[4]	2	2
Provision	[4]	0	0
Charge-offs	[4]	0	0
Recoveries and other	[2],[4]	0	0
Financing Receivable, Allowance for Credit Losses	[1],[4]	2	2
Financing Receivable, Collectively Evaluated for Impairment	[3],[4]	$ 72	$ 52

[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 $108 and $110 at December 31, 2017 and 2016, respectively.

[4] Includes developing market countries and smaller units.