Finance Receivables (Details 4) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	$ 27,514	$ 27,054
Customer
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	9,515	8,399
2020 and 2019, respectively	5,308	5,622
2019 and 2018, respectively	3,124	2,994
2018 and 2017, respectively	1,493	1,440
2017 and 2016, respectively	621	597
Prior	411	495
Revolving Finance Receivables	370	380
Total Finance Receivables	20,842	19,927
Customer | North America | Current
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	4,792	3,780
2020 and 2019, respectively	2,596	2,423
2019 and 2018, respectively	1,426	1,344
2018 and 2017, respectively	630	522
2017 and 2016, respectively	182	212
Prior	32	27
Revolving Finance Receivables	182	89
Total Finance Receivables	9,840	8,397
Customer | North America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	27	52
2020 and 2019, respectively	32	49
2019 and 2018, respectively	20	33
2018 and 2017, respectively	12	16
2017 and 2016, respectively	4	7
Prior	1	2
Revolving Finance Receivables	5	0
Total Finance Receivables	101	159
Customer | North America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	7	22
2020 and 2019, respectively	8	25
2019 and 2018, respectively	5	16
2018 and 2017, respectively	3	9
2017 and 2016, respectively	1	2
Prior	1	1
Revolving Finance Receivables	5	0
Total Finance Receivables	30	75
Customer | North America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	9	14
2020 and 2019, respectively	17	35
2019 and 2018, respectively	12	31
2018 and 2017, respectively	13	20
2017 and 2016, respectively	5	9
Prior	4	4
Revolving Finance Receivables	5	2
Total Finance Receivables	65	115
Customer | EAME | Current
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	1,499	1,605
2020 and 2019, respectively	836	931
2019 and 2018, respectively	577	501
2018 and 2017, respectively	352	203
2017 and 2016, respectively	140	60
Prior	26	18
Revolving Finance Receivables	0	0
Total Finance Receivables	3,430	3,318
Customer | EAME | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	5	5
2020 and 2019, respectively	4	15
2019 and 2018, respectively	3	3
2018 and 2017, respectively	1	2
2017 and 2016, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	14	25
Customer | EAME | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	3	1
2020 and 2019, respectively	3	1
2019 and 2018, respectively	3	2
2018 and 2017, respectively	1	1
2017 and 2016, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	10	5
Customer | EAME | 91+ days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	3	7
2020 and 2019, respectively	11	7
2019 and 2018, respectively	2	12
2018 and 2017, respectively	2	4
2017 and 2016, respectively	0	39
Prior	2	43
Revolving Finance Receivables	0	0
Total Finance Receivables	20	112
Customer | Asia/Pacific | Current
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	1,456	1,583
2020 and 2019, respectively	943	933
2019 and 2018, respectively	420	412
2018 and 2017, respectively	119	115
2017 and 2016, respectively	40	32
Prior	3	6
Revolving Finance Receivables	36	32
Total Finance Receivables	3,017	3,113
Customer | Asia/Pacific | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	10	13
2020 and 2019, respectively	14	23
2019 and 2018, respectively	10	13
2018 and 2017, respectively	2	6
2017 and 2016, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	36	55
Customer | Asia/Pacific | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	3	7
2020 and 2019, respectively	7	11
2019 and 2018, respectively	4	7
2018 and 2017, respectively	1	1
2017 and 2016, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	15	26
Customer | Asia/Pacific | 91+ days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	2	4
2020 and 2019, respectively	10	10
2019 and 2018, respectively	10	9
2018 and 2017, respectively	3	3
2017 and 2016, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	25	26
Customer | Mining | Current
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	944	515
2020 and 2019, respectively	356	574
2019 and 2018, respectively	332	289
2018 and 2017, respectively	194	181
2017 and 2016, respectively	36	92
Prior	161	151
Revolving Finance Receivables	36	137
Total Finance Receivables	2,059	1,939
Customer | Mining | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	6	5
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	5
2018 and 2017, respectively	0	1
2017 and 2016, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	6	11
Customer | Mining | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	1	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
2018 and 2017, respectively	0	0
2017 and 2016, respectively	4	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	5	0
Customer | Mining | 91+ days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	0	0
2020 and 2019, respectively	1	11
2019 and 2018, respectively	8	8
2018 and 2017, respectively	9	2
2017 and 2016, respectively	3	0
Prior	1	0
Revolving Finance Receivables	0	1
Total Finance Receivables	22	22
Customer | Latin America | Current
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	617	561
2020 and 2019, respectively	299	348
2019 and 2018, respectively	160	151
2018 and 2017, respectively	70	48
2017 and 2016, respectively	17	13
Prior	18	34
Revolving Finance Receivables	0	0
Total Finance Receivables	1,181	1,155
Customer | Latin America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	4	3
2020 and 2019, respectively	7	6
2019 and 2018, respectively	3	4
2018 and 2017, respectively	3	3
2017 and 2016, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	18	16
Customer | Latin America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	3	1
2020 and 2019, respectively	3	7
2019 and 2018, respectively	1	6
2018 and 2017, respectively	1	3
2017 and 2016, respectively	0	2
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	8	19
Customer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	4	2
2020 and 2019, respectively	9	14
2019 and 2018, respectively	9	11
2018 and 2017, respectively	7	24
2017 and 2016, respectively	7	5
Prior	14	4
Revolving Finance Receivables	0	0
Total Finance Receivables	50	60
Customer | Caterpillar Power Finance | Current
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	120	217
2020 and 2019, respectively	152	199
2019 and 2018, respectively	119	111
2018 and 2017, respectively	70	273
2017 and 2016, respectively	180	99
Prior	104	117
Revolving Finance Receivables	101	119
Total Finance Receivables	846	1,135
Customer | Caterpillar Power Finance | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	6
2018 and 2017, respectively	0	0
2017 and 2016, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	0	6
Customer | Caterpillar Power Finance | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
2018 and 2017, respectively	0	0
2017 and 2016, respectively	0	0
Prior	0	9
Revolving Finance Receivables	0	0
Total Finance Receivables	0	9
Customer | Caterpillar Power Finance | 91+ days past due
Financing Receivable, Credit Quality Indicator
2021 and 2020, respectively	0	2
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	20
2018 and 2017, respectively	0	3
2017 and 2016, respectively	0	25
Prior	44	79
Revolving Finance Receivables	0	0
Total Finance Receivables	44	129
Dealer
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	2,210	3,481
Dealer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2018 and 2017, respectively		78
Prior		3
Total Finance Receivables	$ 78	$ 81