Segment Information (Details) (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
Segment Reporting Information
Revenues	$ 703	$ 743	$ 728	$ 711	$ 711	$ 699	$ 695	$ 680	$ 2,885	$ 2,785	$ 2,693
Segment Profit	166	197	208	182	204	164	141	185	753	694	584
Interest Expense									631	734	801
Depreciation on equipment leased to others									870	770	688
Provision for credit losses									139	101	163
Segment Assets	35,176				35,114				35,176	35,114	34,735
Capital expenditures									1,627	1,822	1,660
Operating Segments
Segment Reporting Information
Revenues									2,843	2,738	2,644
Segment Profit									806	759	651
Interest Expense									639	720	790
Depreciation on equipment leased to others									869	769	687
Provision for credit losses									139	103	159
Segment Assets	33,866				33,867				33,866	33,867	33,419
Capital expenditures									1,624	1,819	1,658
Unallocated
Segment Reporting Information
Revenues									70	73	73
Segment Profit									(82)	(73)	(93)
Interest Expense									48	53	61
Depreciation on equipment leased to others									1	1	1
Provision for credit losses									2	2	1
Segment Assets	1,648				1,595				1,648	1,595	1,529
Capital expenditures									1	1	0
Timing
Segment Reporting Information
Revenues									(28)	(26)	(24)
Segment Profit									(8)	(10)	(6)
Interest Expense									0	0	0
Depreciation on equipment leased to others									0	0	0
Provision for credit losses									(2)	(4)	3
Segment Assets	120				68				120	68	17
Capital expenditures									2	2	2
Methodology
Segment Reporting Information
Revenues									0	0	0
Segment Profit									37	18	32
Interest Expense									(56)	(39)	(50)
Depreciation on equipment leased to others									0	0	0
Provision for credit losses									0	0	0
Segment Assets	(215)				(189)				(215)	(189)	(61)
Capital expenditures									0	0	0
Intersegment Eliminations
Segment Reporting Information
Revenues									0	0	0
Segment Profit									0	0	0
Interest Expense									0	0	0
Depreciation on equipment leased to others									0	0	0
Provision for credit losses									0	0	0
Segment Assets	(243)				(227)				(243)	(227)	(169)
Capital expenditures									0	0	0
North America | Operating Segments
Segment Reporting Information
Revenues									1,067	946	938
Segment Profit									355	283	264
Interest Expense									240	259	270
Depreciation on equipment leased to others									361	293	274
Provision for credit losses									3	0	15
Segment Assets	13,661				12,160				13,661	12,160	11,309
Capital expenditures									1,077	782	565
Europe and CPF | Operating Segments
Segment Reporting Information
Revenues									498	505	467
Segment Profit									134	146	84
Interest Expense									88	110	134
Depreciation on equipment leased to others									98	86	76
Provision for credit losses									50	47	65
Segment Assets	7,601				8,068				7,601	8,068	7,785
Capital expenditures									133	242	243
Asia/Pacific | Operating Segments
Segment Reporting Information
Revenues									368	399	399
Segment Profit									129	156	134
Interest Expense									116	135	155
Depreciation on equipment leased to others									24	25	23
Provision for credit losses									35	9	24
Segment Assets	4,767				5,251				4,767	5,251	6,144
Capital expenditures									34	54	133
Latin America | Operating Segments
Segment Reporting Information
Revenues									449	414	389
Segment Profit									124	89	109
Interest Expense									130	137	141
Depreciation on equipment leased to others									114	93	64
Provision for credit losses									22	35	28
Segment Assets	4,676				4,947				4,676	4,947	4,969
Capital expenditures									111	272	172
Mining | Operating Segments
Segment Reporting Information
Revenues									461	474	451
Segment Profit									64	85	60
Interest Expense									65	79	90
Depreciation on equipment leased to others									272	272	250
Provision for credit losses									29	12	27
Segment Assets	3,161				3,441				3,161	3,441	3,212
Capital expenditures									$ 269	$ 469	$ 545