Segment and Geographic Information (Details 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets
External Revenues	$ 725	$ 748	$ 757	$ 736	$ 699	$ 735	$ 723	$ 690	$ 2,966	$ 2,847	$ 2,689
Equipment on operating leases, net and property and equipment, net (included in Other assets)	3,718				3,690				3,718	3,690
Inside U.S.
Revenues from External Customers and Long-Lived Assets
External Revenues									1,756	1,684	1,551
Equipment on operating leases, net and property and equipment, net (included in Other assets)	2,686				2,775				2,686	2,775
Inside Canada
Revenues from External Customers and Long-Lived Assets
Equipment on operating leases, net and property and equipment, net (included in Other assets)	479				402				479	402
All other
Revenues from External Customers and Long-Lived Assets
External Revenues									1,210	1,163	$ 1,138
Equipment on operating leases, net and property and equipment, net (included in Other assets)	$ 553				$ 513				$ 553	$ 513