Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information
External Revenues	$ 652	$ 639
Profit before income taxes	193	196
Interest Expense	106	125
Depreciation on equipment leased to others	184	192
Provision for credit losses	27	(10)
Assets	32,595		$ 32,387
Capital expenditures	241	228
Operating Segments
Segment Reporting Information
External Revenues	650	637
Profit before income taxes	218	225
Interest Expense	115	125
Depreciation on equipment leased to others	184	192
Provision for credit losses	27	(10)
Assets	31,189		31,098
Capital expenditures	239	224
Unallocated
Segment Reporting Information
External Revenues	5	5
Profit before income taxes	(72)	(72)
Interest Expense	42	50
Depreciation on equipment leased to others	0	0
Provision for credit losses	0	0
Assets	1,477		1,458
Capital expenditures	2	4
Segment Reconciling Items | Timing
Segment Reporting Information
External Revenues	(3)	(3)
Profit before income taxes	1	1
Interest Expense	0	0
Depreciation on equipment leased to others	0	0
Provision for credit losses	0	0
Assets	16		15
Capital expenditures	0	0
Segment Reconciling Items | Methodology
Segment Reporting Information
External Revenues	0	0
Profit before income taxes	46	42
Interest Expense	(51)	(50)
Depreciation on equipment leased to others	0	0
Provision for credit losses	0	0
Assets	82		18
Capital expenditures	0	0
Inter-segment Eliminations
Segment Reporting Information
External Revenues	0	0
Profit before income taxes	0	0
Interest Expense	0	0
Depreciation on equipment leased to others	0	0
Provision for credit losses	0	0
Assets	(169)		(202)
Capital expenditures	0	0
North America | Operating Segments
Segment Reporting Information
External Revenues	359	347
Profit before income taxes	127	99
Interest Expense	54	69
Depreciation on equipment leased to others	128	137
Provision for credit losses	6	1
Assets	15,846		15,755
Capital expenditures	199	178
EAME | Operating Segments
Segment Reporting Information
External Revenues	67	67
Profit before income taxes	0	30
Interest Expense	7	5
Depreciation on equipment leased to others	14	15
Provision for credit losses	26	(4)
Assets	4,959		5,192
Capital expenditures	14	10
Asia/Pacific | Operating Segments
Segment Reporting Information
External Revenues	75	92
Profit before income taxes	37	51
Interest Expense	17	23
Depreciation on equipment leased to others	1	2
Provision for credit losses	1	0
Assets	4,255		4,117
Capital expenditures	2	3
Latin America | Operating Segments
Segment Reporting Information
External Revenues	58	47
Profit before income taxes	19	16
Interest Expense	26	14
Depreciation on equipment leased to others	2	2
Provision for credit losses	(1)	3
Assets	2,541		2,405
Capital expenditures	2	7
Mining | Operating Segments
Segment Reporting Information
External Revenues	72	71
Profit before income taxes	20	18
Interest Expense	8	10
Depreciation on equipment leased to others	38	35
Provision for credit losses	(2)	(3)
Assets	2,679		2,672
Capital expenditures	22	26
Caterpillar Power Finance | Operating Segments
Segment Reporting Information
External Revenues	19	13
Profit before income taxes	15	11
Interest Expense	3	4
Depreciation on equipment leased to others	1	1
Provision for credit losses	(3)	(7)
Assets	909		$ 957
Capital expenditures	$ 0	$ 0