Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information
External Revenues	$ 668	$ 646	$ 1,320	$ 1,285
Profit before income taxes	199	189	392	385
Interest Expense	120	116	226	241
Depreciation on equipment leased to others	181	187	365	379
Provision for credit losses	23	11	50	1
Assets	31,852		31,852		$ 32,387
Capital expenditures	334	360	575	588
Operating Segments
Segment Reporting Information
External Revenues	665	644	1,315	1,281
Profit before income taxes	221	221	439	446
Interest Expense	135	122	250	247
Depreciation on equipment leased to others	181	187	365	379
Provision for credit losses	23	11	50	1
Assets	29,988		29,988		31,098
Capital expenditures	332	360	571	584
Unallocated
Segment Reporting Information
External Revenues	6	4	11	9
Profit before income taxes	(70)	(75)	(142)	(147)
Interest Expense	43	45	85	95
Depreciation on equipment leased to others	0	0	0	0
Provision for credit losses	0	0	0	0
Assets	1,591		1,591		1,458
Capital expenditures	2	0	4	4
Segment Reconciling Items | Timing
Segment Reporting Information
External Revenues	(3)	(2)	(6)	(5)
Profit before income taxes	2	2	3	3
Interest Expense	0	0	0	0
Depreciation on equipment leased to others	0	0	0	0
Provision for credit losses	0	0	0	0
Assets	18		18		15
Capital expenditures	0	0	0	0
Segment Reconciling Items | Methodology
Segment Reporting Information
External Revenues	0	0	0	0
Profit before income taxes	46	41	92	83
Interest Expense	(58)	(51)	(109)	(101)
Depreciation on equipment leased to others	0	0	0	0
Provision for credit losses	0	0	0	0
Assets	354		354		18
Capital expenditures	0	0	0	0
Inter-segment Eliminations
Segment Reporting Information
External Revenues	0	0	0	0
Profit before income taxes	0	0	0	0
Interest Expense	0	0	0	0
Depreciation on equipment leased to others	0	0	0	0
Provision for credit losses	0	0	0	0
Assets	(99)		(99)		(202)
Capital expenditures	0	0	0	0
North America | Operating Segments
Segment Reporting Information
External Revenues	370	348	729	695
Profit before income taxes	134	102	261	201
Interest Expense	58	64	112	133
Depreciation on equipment leased to others	127	134	255	271
Provision for credit losses	10	3	16	4
Assets	15,430		15,430		15,755
Capital expenditures	248	266	447	444
EAME | Operating Segments
Segment Reporting Information
External Revenues	68	68	135	135
Profit before income taxes	5	(6)	5	24
Interest Expense	11	5	18	10
Depreciation on equipment leased to others	14	15	28	30
Provision for credit losses	16	32	42	28
Assets	4,785		4,785		5,192
Capital expenditures	42	17	56	27
Asia/Pacific | Operating Segments
Segment Reporting Information
External Revenues	71	93	146	185
Profit before income taxes	34	49	71	100
Interest Expense	19	25	36	48
Depreciation on equipment leased to others	2	2	3	4
Provision for credit losses	3	0	4	0
Assets	3,871		3,871		4,117
Capital expenditures	1	2	3	5
Latin America | Operating Segments
Segment Reporting Information
External Revenues	71	50	129	97
Profit before income taxes	15	18	34	34
Interest Expense	35	15	61	29
Depreciation on equipment leased to others	2	2	4	4
Provision for credit losses	6	4	5	7
Assets	2,603		2,603		2,405
Capital expenditures	16	1	18	8
Mining | Operating Segments
Segment Reporting Information
External Revenues	74	71	146	142
Profit before income taxes	25	39	45	57
Interest Expense	10	10	18	20
Depreciation on equipment leased to others	36	34	74	69
Provision for credit losses	(8)	(16)	(10)	(19)
Assets	2,556		2,556		2,672
Capital expenditures	25	74	47	100
Caterpillar Power Finance | Operating Segments
Segment Reporting Information
External Revenues	11	14	30	27
Profit before income taxes	8	19	23	30
Interest Expense	2	3	5	7
Depreciation on equipment leased to others	0	0	1	1
Provision for credit losses	(4)	(12)	(7)	(19)
Assets	743		743		$ 957
Capital expenditures	$ 0	$ 0	$ 0	$ 0