Finance Receivables (Details 4) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	$ 27,712	$ 27,514	$ 26,941
Customer
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	2,302	9,515
2021 and 2020, respectively	8,810	5,308
2020 and 2019, respectively	4,710	3,124
2019 and 2018, respectively	2,665	1,493
2018 and 2017, respectively	1,229	621
Prior	835	411
Revolving Finance Receivables	402	370
Total Finance Receivables	20,953	20,842	19,798
Customer | Current
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	2,293	9,428
2021 and 2020, respectively	8,697	5,182
2020 and 2019, respectively	4,590	3,034
2019 and 2018, respectively	2,579	1,435
2018 and 2017, respectively	1,167	595
Prior	752	344
Revolving Finance Receivables	389	355
Total Finance Receivables	20,467	20,373
Customer | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	9	52
2021 and 2020, respectively	61	57
2020 and 2019, respectively	54	36
2019 and 2018, respectively	34	18
2018 and 2017, respectively	25	6
Prior	3	1
Revolving Finance Receivables	6	5
Total Finance Receivables	192	175
Customer | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	17
2021 and 2020, respectively	21	21
2020 and 2019, respectively	17	13
2019 and 2018, respectively	11	6
2018 and 2017, respectively	5	5
Prior	2	1
Revolving Finance Receivables	2	5
Total Finance Receivables	58	68
Customer | 91+ days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	18
2021 and 2020, respectively	31	48
2020 and 2019, respectively	49	41
2019 and 2018, respectively	41	34
2018 and 2017, respectively	32	15
Prior	78	65
Revolving Finance Receivables	5	5
Total Finance Receivables	236	226
Customer | North America | Current
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	1,204	4,792
2021 and 2020, respectively	4,442	2,596
2020 and 2019, respectively	2,323	1,426
2019 and 2018, respectively	1,213	630
2018 and 2017, respectively	503	182
Prior	154	32
Revolving Finance Receivables	188	182
Total Finance Receivables	10,027	9,840
Customer | North America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	5	27
2021 and 2020, respectively	29	32
2020 and 2019, respectively	22	20
2019 and 2018, respectively	15	12
2018 and 2017, respectively	7	4
Prior	3	1
Revolving Finance Receivables	6	5
Total Finance Receivables	87	101
Customer | North America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	7
2021 and 2020, respectively	8	8
2020 and 2019, respectively	4	5
2019 and 2018, respectively	4	3
2018 and 2017, respectively	2	1
Prior	1	1
Revolving Finance Receivables	2	5
Total Finance Receivables	21	30
Customer | North America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	9
2021 and 2020, respectively	10	17
2020 and 2019, respectively	13	12
2019 and 2018, respectively	10	13
2018 and 2017, respectively	11	5
Prior	8	4
Revolving Finance Receivables	5	5
Total Finance Receivables	57	65
Customer | EAME | Current
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	307	1,499
2021 and 2020, respectively	1,369	836
2020 and 2019, respectively	739	577
2019 and 2018, respectively	496	352
2018 and 2017, respectively	295	140
Prior	136	26
Revolving Finance Receivables	0	0
Total Finance Receivables	3,342	3,430
Customer | EAME | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	1	5
2021 and 2020, respectively	12	4
2020 and 2019, respectively	6	3
2019 and 2018, respectively	5	1
2018 and 2017, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	25	14
Customer | EAME | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	3
2021 and 2020, respectively	4	3
2020 and 2019, respectively	4	3
2019 and 2018, respectively	1	1
2018 and 2017, respectively	1	0
Prior	1	0
Revolving Finance Receivables	0	0
Total Finance Receivables	11	10
Customer | EAME | 91+ days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	3
2021 and 2020, respectively	4	11
2020 and 2019, respectively	11	2
2019 and 2018, respectively	3	2
2018 and 2017, respectively	2	0
Prior	2	2
Revolving Finance Receivables	0	0
Total Finance Receivables	22	20
Customer | Asia/Pacific | Current
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	369	1,456
2021 and 2020, respectively	1,313	943
2020 and 2019, respectively	786	420
2019 and 2018, respectively	317	119
2018 and 2017, respectively	91	40
Prior	30	3
Revolving Finance Receivables	38	36
Total Finance Receivables	2,944	3,017
Customer | Asia/Pacific | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	1	10
2021 and 2020, respectively	14	14
2020 and 2019, respectively	19	10
2019 and 2018, respectively	9	2
2018 and 2017, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	44	36
Customer | Asia/Pacific | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	3
2021 and 2020, respectively	4	7
2020 and 2019, respectively	8	4
2019 and 2018, respectively	5	1
2018 and 2017, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	18	15
Customer | Asia/Pacific | 91+ days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	2
2021 and 2020, respectively	7	10
2020 and 2019, respectively	10	10
2019 and 2018, respectively	11	3
2018 and 2017, respectively	2	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	30	25
Customer | Mining | Current
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	197	944
2021 and 2020, respectively	858	356
2020 and 2019, respectively	321	332
2019 and 2018, respectively	303	194
2018 and 2017, respectively	168	36
Prior	167	161
Revolving Finance Receivables	48	36
Total Finance Receivables	2,062	2,059
Customer | Mining | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	6
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
2018 and 2017, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	0	6
Customer | Mining | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	1
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
2018 and 2017, respectively	0	4
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	0	5
Customer | Mining | 91+ days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	0
2021 and 2020, respectively	1	1
2020 and 2019, respectively	1	8
2019 and 2018, respectively	8	9
2018 and 2017, respectively	12	3
Prior	8	1
Revolving Finance Receivables	0	0
Total Finance Receivables	30	22
Customer | Latin America | Current
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	204	617
2021 and 2020, respectively	607	299
2020 and 2019, respectively	270	160
2019 and 2018, respectively	137	70
2018 and 2017, respectively	45	17
Prior	29	18
Revolving Finance Receivables	0	0
Total Finance Receivables	1,292	1,181
Customer | Latin America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	4
2021 and 2020, respectively	6	7
2020 and 2019, respectively	7	3
2019 and 2018, respectively	5	3
2018 and 2017, respectively	16	1
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	34	18
Customer | Latin America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	3
2021 and 2020, respectively	5	3
2020 and 2019, respectively	1	1
2019 and 2018, respectively	1	1
2018 and 2017, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	8	8
Customer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	4
2021 and 2020, respectively	9	9
2020 and 2019, respectively	14	9
2019 and 2018, respectively	9	7
2018 and 2017, respectively	5	7
Prior	18	14
Revolving Finance Receivables	0	0
Total Finance Receivables	55	50
Customer | Caterpillar Power Finance | Current
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	12	120
2021 and 2020, respectively	108	152
2020 and 2019, respectively	151	119
2019 and 2018, respectively	113	70
2018 and 2017, respectively	65	180
Prior	236	104
Revolving Finance Receivables	115	101
Total Finance Receivables	800	846
Customer | Caterpillar Power Finance | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	2	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
2018 and 2017, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	2	0
Customer | Caterpillar Power Finance | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
2018 and 2017, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	0	0
Customer | Caterpillar Power Finance | 91+ days past due
Financing Receivable, Credit Quality Indicator
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
2018 and 2017, respectively	0	0
Prior	42	44
Revolving Finance Receivables	0	0
Total Finance Receivables	42	44
Dealer
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	2,112		$ 3,078
Dealer | Total past due
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	81
Dealer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2018 and 2017, respectively		$ 78
Prior	$ 78