Segment and Geographic Information (Details 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets
External Revenues	$ 678	$ 673	$ 676	$ 662	$ 642	$ 651	$ 659	$ 643	$ 2,689	$ 2,595	$ 2,673
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	3,630				3,770				3,630	3,770
Inside U.S.
Revenues from External Customers and Long-Lived Assets
External Revenues									1,551	1,397	1,330
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	2,554				2,401				2,554	2,401
Inside Canada
Revenues from External Customers and Long-Lived Assets
External Revenues									157	171	198
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	413				535				413	535
Inside Australia
Revenues from External Customers and Long-Lived Assets
External Revenues									139	176	200
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	113				250				113	250
All other
Revenues from External Customers and Long-Lived Assets
External Revenues									842	851	$ 945
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	$ 550				$ 584				$ 550	$ 584