Cat Financial Financing Activities - Financing Receivable Credit Quality Indicator (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Receivables [Abstract]
Period after which Unpaid Installments are Considered as Past Due	30 days
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	$ 21,607		$ 21,652
Customer
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	4,304	$ 8,023
2022 and 2021, respectively	6,776	6,121
2021 and 2020, respectively	4,810	2,924
2020 and 2019, respectively	2,056	1,314
2019 and 2018, respectively	851	529
Prior	534	405
Revolving Finance Receivables	483	456
Total Finance Receivables	19,814	19,772	$ 19,888
Customer | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	4,280	7,929
2022 and 2021, respectively	6,590	5,973
2021 and 2020, respectively	4,636	2,827
2020 and 2019, respectively	1,977	1,275
2019 and 2018, respectively	811	516
Prior	500	393
Revolving Finance Receivables	477	445
Total Finance Receivables	19,271	19,358
Customer | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	18	52
2022 and 2021, respectively	105	59
2021 and 2020, respectively	85	37
2020 and 2019, respectively	29	16
2019 and 2018, respectively	16	6
Prior	3	2
Revolving Finance Receivables	3	4
Total Finance Receivables	259	176
Customer | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	4	21
2022 and 2021, respectively	27	29
2021 and 2020, respectively	24	15
2020 and 2019, respectively	15	7
2019 and 2018, respectively	6	1
Prior	1	0
Revolving Finance Receivables	1	3
Total Finance Receivables	78	76
Customer | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	2	21
2022 and 2021, respectively	54	60
2021 and 2020, respectively	65	45
2020 and 2019, respectively	35	16
2019 and 2018, respectively	18	6
Prior	30	10
Revolving Finance Receivables	2	4
Total Finance Receivables	206	162
Customer | North America | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	2,056	3,915
2022 and 2021, respectively	3,251	3,276
2021 and 2020, respectively	2,610	1,525
2020 and 2019, respectively	1,104	653
2019 and 2018, respectively	407	206
Prior	109	34
Revolving Finance Receivables	285	240
Total Finance Receivables	9,822	9,849
Customer | North America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	13	25
2022 and 2021, respectively	31	26
2021 and 2020, respectively	24	18
2020 and 2019, respectively	15	12
2019 and 2018, respectively	10	4
Prior	2	1
Revolving Finance Receivables	3	4
Total Finance Receivables	98	90
Customer | North America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	3	9
2022 and 2021, respectively	13	15
2021 and 2020, respectively	10	7
2020 and 2019, respectively	6	3
2019 and 2018, respectively	2	1
Prior	1	0
Revolving Finance Receivables	1	3
Total Finance Receivables	36	38
Customer | North America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1	11
2022 and 2021, respectively	16	16
2021 and 2020, respectively	20	12
2020 and 2019, respectively	11	6
2019 and 2018, respectively	5	4
Prior	4	3
Revolving Finance Receivables	2	4
Total Finance Receivables	59	56
Customer | EAME | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	623	1,270
2022 and 2021, respectively	1,091	953
2021 and 2020, respectively	757	477
2020 and 2019, respectively	361	280
2019 and 2018, respectively	190	155
Prior	155	68
Revolving Finance Receivables	0	0
Total Finance Receivables	3,177	3,203
Customer | EAME | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	3	10
2022 and 2021, respectively	8	12
2021 and 2020, respectively	11	7
2020 and 2019, respectively	4	1
2019 and 2018, respectively	1	1
Prior	1	0
Revolving Finance Receivables	0	0
Total Finance Receivables	28	31
Customer | EAME | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1	8
2022 and 2021, respectively	5	4
2021 and 2020, respectively	6	3
2020 and 2019, respectively	3	1
2019 and 2018, respectively	2	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	17	16
Customer | EAME | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	6
2022 and 2021, respectively	16	25
2021 and 2020, respectively	18	16
2020 and 2019, respectively	11	4
2019 and 2018, respectively	3	1
Prior	1	1
Revolving Finance Receivables	0	0
Total Finance Receivables	49	53
Customer | Asia/ Pacific | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	536	1,033
2022 and 2021, respectively	770	684
2021 and 2020, respectively	452	313
2020 and 2019, respectively	155	69
2019 and 2018, respectively	33	18
Prior	9	2
Revolving Finance Receivables	0	0
Total Finance Receivables	1,955	2,119
Customer | Asia/ Pacific | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	10
2022 and 2021, respectively	8	12
2021 and 2020, respectively	11	8
2020 and 2019, respectively	7	1
2019 and 2018, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	27	32
Customer | Asia/ Pacific | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	2
2022 and 2021, respectively	4	5
2021 and 2020, respectively	5	4
2020 and 2019, respectively	2	2
2019 and 2018, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	12	13
Customer | Asia/ Pacific | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1	2
2022 and 2021, respectively	4	6
2021 and 2020, respectively	5	6
2020 and 2019, respectively	4	4
2019 and 2018, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	15	18
Customer | Mining | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	646	863
2022 and 2021, respectively	749	575
2021 and 2020, respectively	439	220
2020 and 2019, respectively	169	171
2019 and 2018, respectively	112	93
Prior	69	108
Revolving Finance Receivables	38	80
Total Finance Receivables	2,222	2,110
Customer | Mining | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	0
2022 and 2021, respectively	42	1
2021 and 2020, respectively	32	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	74	1
Customer | Mining | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	0	0
Customer | Mining | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	0
2022 and 2021, respectively	2	0
2021 and 2020, respectively	1	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	0	1
Revolving Finance Receivables	0	0
Total Finance Receivables	3	1
Customer | Latin America | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	389	770
2022 and 2021, respectively	658	400
2021 and 2020, respectively	305	150
2020 and 2019, respectively	99	69
2019 and 2018, respectively	38	26
Prior	13	20
Revolving Finance Receivables	0	0
Total Finance Receivables	1,502	1,435
Customer | Latin America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	2	7
2022 and 2021, respectively	16	8
2021 and 2020, respectively	7	4
2020 and 2019, respectively	3	2
2019 and 2018, respectively	4	0
Prior	0	1
Revolving Finance Receivables	0	0
Total Finance Receivables	32	22
Customer | Latin America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	2
2022 and 2021, respectively	5	5
2021 and 2020, respectively	3	1
2020 and 2019, respectively	4	1
2019 and 2018, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	13	9
Customer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	2
2022 and 2021, respectively	16	13
2021 and 2020, respectively	21	11
2020 and 2019, respectively	9	2
2019 and 2018, respectively	9	1
Prior	22	0
Revolving Finance Receivables	0	0
Total Finance Receivables	77	29
Customer | Power Finance | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	30	78
2022 and 2021, respectively	71	85
2021 and 2020, respectively	73	142
2020 and 2019, respectively	89	33
2019 and 2018, respectively	31	18
Prior	145	161
Revolving Finance Receivables	154	125
Total Finance Receivables	593	642
Customer | Power Finance | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	0	0
Customer | Power Finance | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	0	0
Customer | Power Finance | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	3	5
Revolving Finance Receivables	0	0
Total Finance Receivables	$ 3	$ 5