Cat Financial Financing Activities - Financing Receivable Credit Quality Indicator (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Receivables [Abstract]
Period after which Unpaid Installments are Considered as Past Due	30 days
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	$ 21,828		$ 21,100
Customer
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	6,233	$ 8,023
2022 and 2021, respectively	6,075	6,121
2021 and 2020, respectively	4,183	2,924
2020 and 2019, respectively	1,690	1,314
2019 and 2018, respectively	657	529
Prior	408	405
Revolving Finance Receivables	522	456
Total Finance Receivables	19,768	19,772	19,363
Customer | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	6,175	7,929
2022 and 2021, respectively	5,931	5,973
2021 and 2020, respectively	4,064	2,827
2020 and 2019, respectively	1,622	1,275
2019 and 2018, respectively	626	516
Prior	374	393
Revolving Finance Receivables	515	445
Total Finance Receivables	19,307	19,358
Customer | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	37	52
2022 and 2021, respectively	64	59
2021 and 2020, respectively	51	37
2020 and 2019, respectively	26	16
2019 and 2018, respectively	11	6
Prior	4	2
Revolving Finance Receivables	3	4
Total Finance Receivables	196	176
Customer | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	11	21
2022 and 2021, respectively	24	29
2021 and 2020, respectively	16	15
2020 and 2019, respectively	12	7
2019 and 2018, respectively	4	1
Prior	2	0
Revolving Finance Receivables	2	3
Total Finance Receivables	71	76
Customer | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	10	21
2022 and 2021, respectively	56	60
2021 and 2020, respectively	52	45
2020 and 2019, respectively	30	16
2019 and 2018, respectively	16	6
Prior	28	10
Revolving Finance Receivables	2	4
Total Finance Receivables	194	162
Customer | North America | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	3,134	3,915
2022 and 2021, respectively	2,940	3,276
2021 and 2020, respectively	2,310	1,525
2020 and 2019, respectively	919	653
2019 and 2018, respectively	310	206
Prior	65	34
Revolving Finance Receivables	304	240
Total Finance Receivables	9,982	9,849
Customer | North America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	18	25
2022 and 2021, respectively	31	26
2021 and 2020, respectively	23	18
2020 and 2019, respectively	15	12
2019 and 2018, respectively	6	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	6	9
2022 and 2021, respectively	10	15
2021 and 2020, respectively	7	7
2020 and 2019, respectively	4	3
2019 and 2018, respectively	1	1
Prior	0	0
Revolving Finance Receivables	2	3
Total Finance Receivables	30	38
Customer | North America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	5	11
2022 and 2021, respectively	19	16
2021 and 2020, respectively	18	12
2020 and 2019, respectively	10	6
2019 and 2018, respectively	5	4
Prior	3	3
Revolving Finance Receivables	2	4
Total Finance Receivables	62	56
Customer | EAME | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	914	1,270
2022 and 2021, respectively	962	953
2021 and 2020, respectively	649	477
2020 and 2019, respectively	297	280
2019 and 2018, respectively	144	155
Prior	124	68
Revolving Finance Receivables	0	0
Total Finance Receivables	3,090	3,203
Customer | EAME | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	11	10
2022 and 2021, respectively	8	12
2021 and 2020, respectively	11	7
2020 and 2019, respectively	3	1
2019 and 2018, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	34	31
Customer | EAME | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	3	8
2022 and 2021, respectively	6	4
2021 and 2020, respectively	3	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	4	6
2022 and 2021, respectively	16	25
2021 and 2020, respectively	18	16
2020 and 2019, respectively	9	4
2019 and 2018, respectively	3	1
Prior	1	1
Revolving Finance Receivables	0	0
Total Finance Receivables	51	53
Customer | Asia/ Pacific | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	722	1,033
2022 and 2021, respectively	660	684
2021 and 2020, respectively	361	313
2020 and 2019, respectively	103	69
2019 and 2018, respectively	21	18
Prior	6	2
Revolving Finance Receivables	0	0
Total Finance Receivables	1,873	2,119
Customer | Asia/ Pacific | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	2	10
2022 and 2021, respectively	12	12
2021 and 2020, respectively	10	8
2020 and 2019, respectively	4	1
2019 and 2018, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	29	32
Customer | Asia/ Pacific | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1	2
2022 and 2021, respectively	3	5
2021 and 2020, respectively	3	4
2020 and 2019, respectively	4	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	0	2
2022 and 2021, respectively	4	6
2021 and 2020, respectively	5	6
2020 and 2019, respectively	3	4
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	12	18
Customer | Mining | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	807	863
2022 and 2021, respectively	730	575
2021 and 2020, respectively	420	220
2020 and 2019, respectively	143	171
2019 and 2018, respectively	92	93
Prior	49	108
Revolving Finance Receivables	49	80
Total Finance Receivables	2,290	2,110
Customer | Mining | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	1
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	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	1	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	2	0
Revolving Finance Receivables	0	0
Total Finance Receivables	3	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	2	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	1	1
Revolving Finance Receivables	0	0
Total Finance Receivables	5	1
Customer | Latin America | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	552	770
2022 and 2021, respectively	571	400
2021 and 2020, respectively	255	150
2020 and 2019, respectively	74	69
2019 and 2018, respectively	29	26
Prior	8	20
Revolving Finance Receivables	0	0
Total Finance Receivables	1,489	1,435
Customer | Latin America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	6	7
2022 and 2021, respectively	13	8
2021 and 2020, respectively	7	4
2020 and 2019, respectively	4	2
2019 and 2018, respectively	3	0
Prior	1	1
Revolving Finance Receivables	0	0
Total Finance Receivables	34	22
Customer | Latin America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1	2
2022 and 2021, respectively	5	5
2021 and 2020, respectively	2	1
2020 and 2019, respectively	1	1
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total Finance Receivables	9	9
Customer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1	2
2022 and 2021, respectively	15	13
2021 and 2020, respectively	9	11
2020 and 2019, respectively	8	2
2019 and 2018, respectively	8	1
Prior	20	0
Revolving Finance Receivables	0	0
Total Finance Receivables	61	29
Customer | Power | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	46	78
2022 and 2021, respectively	68	85
2021 and 2020, respectively	69	142
2020 and 2019, respectively	86	33
2019 and 2018, respectively	30	18
Prior	122	161
Revolving Finance Receivables	162	125
Total Finance Receivables	583	642
Customer | Power | 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	1	0
Revolving Finance Receivables	0	0
Total Finance Receivables	1	0
Customer | Power | 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 | 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
Dealer
Financing Receivable, Credit Quality Indicator
Total Finance Receivables	2,060		$ 1,737
Dealer | Latin America | Financing Receivables, Equal to or Greater than 30 Days Past Due
Financing Receivable, Credit Quality Indicator
Prior	$ 44	$ 58