Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets
Revenues	$ 703	$ 743	$ 728	$ 711	$ 711	$ 699	$ 695	$ 680	$ 2,885	$ 2,785	$ 2,693
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	3,706				3,637				3,706	3,637	3,074
Inside U.S.
Revenues from External Customers and Long-Lived Assets
Revenues									1,219	1,045	1,009
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	1,696				1,437				1,696	1,437	1,204
Inside Canada
Revenues from External Customers and Long-Lived Assets
Revenues									259	329	330
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	756				729				756	729	741
Inside Australia
Revenues from External Customers and Long-Lived Assets
Revenues									261	287	302
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	358				434				358	434	341
All other
Revenues from External Customers and Long-Lived Assets
Revenues									1,146	1,124	1,052
Equipment on Operating Leases and Non-Leased Equipment (included in Other Assets), net	$ 896				$ 1,037				$ 896	$ 1,037	$ 788