Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information
Revenues	$ 679	$ 678	$ 668	$ 668	$ 662	$ 668	$ 675	$ 640	$ 633	$ 640	$ 648	$ 631	$ 2,693	$ 2,645	$ 2,552
Segment Profit	124	153	144	170	111	126	152	115	74	89	95	71	591	504	329
Interest Expense													801	827	917
Depreciation on equipment leased to others													688	690	690
Provision for credit losses													161	176	213
Segment Assets	34,742				30,112				28,752				34,742	30,112	28,752
Capital expenditures													1,660	1,190	959
North America
Segment Reporting Information
Revenues													950	966	985
Segment Profit													258	221	46
Interest Expense													288	314	380
Depreciation on equipment leased to others													274	276	302
Provision for credit losses													15	34	120
Segment Assets	11,945				11,177				11,111				11,945	11,177	11,111
Capital expenditures													565	530	512
Europe and CPF
Segment Reporting Information
Revenues													466	502	498
Segment Profit													97	53	79
Interest Expense													122	148	182
Depreciation on equipment leased to others													76	89	92
Provision for credit losses													65	105	50
Segment Assets	7,598				6,601				6,884				7,598	6,601	6,884
Capital expenditures													243	118	120
Asia/Pacific
Segment Reporting Information
Revenues													399	333	441
Segment Profit													142	111	96
Interest Expense													145	130	138
Depreciation on equipment leased to others													23	16	133
Provision for credit losses													24	28	25
Segment Assets	5,956				4,557				4,315				5,956	4,557	4,315
Capital expenditures													133	42	21
Latin America
Segment Reporting Information
Revenues													389	350	297
Segment Profit													122	110	101
Interest Expense													130	128	121
Depreciation on equipment leased to others													64	47	29
Provision for credit losses													26	17	9
Segment Assets	4,817				3,947				3,391				4,817	3,947	3,391
Capital expenditures													172	175	109
Mining
Segment Reporting Information
Revenues													451	446	252
Segment Profit													61	76	48
Interest Expense													90	87	62
Depreciation on equipment leased to others													250	260	131
Provision for credit losses													27	3	(3)
Segment Assets	3,225				2,645				1,523				3,225	2,645	1,523
Capital expenditures													545	321	156
Total Segments
Segment Reporting Information
Revenues													2,655	2,597	2,473
Segment Profit													680	571	370
Interest Expense													775	807	883
Depreciation on equipment leased to others													687	688	687
Provision for credit losses													157	187	201
Segment Assets	33,541				28,927				27,224				33,541	28,927	27,224
Capital expenditures													1,658	1,186	918
Unallocated
Segment Reporting Information
Revenues													62	70	104
Segment Profit													(93)	(55)	(19)
Interest Expense													46	22	28
Depreciation on equipment leased to others													1	2	3
Provision for credit losses													0	2	0
Segment Assets	1,409				1,350				1,617				1,409	1,350	1,617
Capital expenditures													0	3	40
Timing
Segment Reporting Information
Revenues													(24)	(22)	(25)
Segment Profit													(11)	(6)	(31)
Interest Expense													5	12	14
Depreciation on equipment leased to others													0	0	0
Provision for credit losses													4	(13)	12
Segment Assets	17				67				113				17	67	113
Capital expenditures													2	1	1
Methodology
Segment Reporting Information
Revenues													0	0	0
Segment Profit													15	(6)	9
Interest Expense													(25)	(14)	(8)
Depreciation on equipment leased to others													0	0	0
Provision for credit losses													0	0	0
Segment Assets	(61)				15				(21)				(61)	15	(21)
Capital expenditures													0	0	0
Inter-segment 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	(164)				(247)				(181)				(164)	(247)	(181)
Capital expenditures													$ 0	$ 0	$ 0