Cat Financial Financing Activities - Amortized cost of finance receivables in the customer portfolio segment by origination year (Details) - Finance Receivables - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator
Total	$ 22,449	$ 21,357
Customer
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	8,742	8,023
2022 and 2021, respectively	5,504	6,121
2021 and 2020, respectively	3,649	2,924
2020 and 2019, respectively	1,383	1,314
2019 and 2018, respectively	493	529
Prior	252	405
Revolving Finance Receivables	548	456
Total	20,571	19,772
Customer | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	8,650	7,929
2022 and 2021, respectively	5,372	5,973
2021 and 2020, respectively	3,545	2,827
2020 and 2019, respectively	1,331	1,275
2019 and 2018, respectively	466	516
Prior	233	393
Revolving Finance Receivables	540	445
Total	20,137	19,358
Customer | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	52	52
2022 and 2021, respectively	56	59
2021 and 2020, respectively	44	37
2020 and 2019, respectively	20	16
2019 and 2018, respectively	8	6
Prior	1	2
Revolving Finance Receivables	4	4
Total	185	176
Customer | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	18	21
2022 and 2021, respectively	21	29
2021 and 2020, respectively	15	15
2020 and 2019, respectively	7	7
2019 and 2018, respectively	3	1
Prior	1	0
Revolving Finance Receivables	2	3
Total	67	76
Customer | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	22	21
2022 and 2021, respectively	55	60
2021 and 2020, respectively	45	45
2020 and 2019, respectively	25	16
2019 and 2018, respectively	16	6
Prior	17	10
Revolving Finance Receivables	2	4
Total	182	162
Customer | North America | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	4,430	3,915
2022 and 2021, respectively	2,628	3,276
2021 and 2020, respectively	2,000	1,525
2020 and 2019, respectively	745	653
2019 and 2018, respectively	220	206
Prior	32	34
Revolving Finance Receivables	312	240
Total	10,367	9,849
Customer | North America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	28	25
2022 and 2021, respectively	31	26
2021 and 2020, respectively	24	18
2020 and 2019, respectively	14	12
2019 and 2018, respectively	7	4
Prior	1	1
Revolving Finance Receivables	4	4
Total	109	90
Customer | North America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	10	9
2022 and 2021, respectively	11	15
2021 and 2020, respectively	8	7
2020 and 2019, respectively	4	3
2019 and 2018, respectively	1	1
Prior	0	0
Revolving Finance Receivables	2	3
Total	36	38
Customer | North America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	12	11
2022 and 2021, respectively	23	16
2021 and 2020, respectively	18	12
2020 and 2019, respectively	9	6
2019 and 2018, respectively	4	4
Prior	1	3
Revolving Finance Receivables	2	4
Total	69	56
Customer | EAME | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1,336	1,270
2022 and 2021, respectively	895	953
2021 and 2020, respectively	588	477
2020 and 2019, respectively	258	280
2019 and 2018, respectively	111	155
Prior	105	68
Revolving Finance Receivables	0	0
Total	3,293	3,203
Customer | EAME | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	10	10
2022 and 2021, respectively	9	12
2021 and 2020, respectively	7	7
2020 and 2019, respectively	3	1
2019 and 2018, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total	30	31
Customer | EAME | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	4	8
2022 and 2021, respectively	3	4
2021 and 2020, respectively	3	3
2020 and 2019, respectively	1	1
2019 and 2018, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	12	16
Customer | EAME | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	7	6
2022 and 2021, respectively	17	25
2021 and 2020, respectively	15	16
2020 and 2019, respectively	8	4
2019 and 2018, respectively	3	1
Prior	1	1
Revolving Finance Receivables	0	0
Total	51	53
Customer | Asia/Pacific | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	943	1,033
2022 and 2021, respectively	594	684
2021 and 2020, respectively	293	313
2020 and 2019, respectively	73	69
2019 and 2018, respectively	16	18
Prior	4	2
Revolving Finance Receivables	0	0
Total	1,923	2,119
Customer | Asia/Pacific | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	5	10
2022 and 2021, respectively	6	12
2021 and 2020, respectively	7	8
2020 and 2019, respectively	2	1
2019 and 2018, respectively	0	1
Prior	0	0
Revolving Finance Receivables	0	0
Total	20	32
Customer | Asia/Pacific | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	2	2
2022 and 2021, respectively	3	5
2021 and 2020, respectively	3	4
2020 and 2019, respectively	2	2
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	10	13
Customer | Asia/Pacific | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1	2
2022 and 2021, respectively	5	6
2021 and 2020, respectively	3	6
2020 and 2019, respectively	3	4
2019 and 2018, respectively	1	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	13	18
Customer | Mining | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	1,039	863
2022 and 2021, respectively	686	575
2021 and 2020, respectively	381	220
2020 and 2019, respectively	121	171
2019 and 2018, respectively	68	93
Prior	27	108
Revolving Finance Receivables	66	80
Total	2,388	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	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	0	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	1	0
Prior	1	0
Revolving Finance Receivables	0	0
Total	2	0
Customer | Mining | 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	1	0
2020 and 2019, respectively	0	0
2019 and 2018, respectively	0	0
Prior	1	1
Revolving Finance Receivables	0	0
Total	2	1
Customer | Latin America | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	750	770
2022 and 2021, respectively	520	400
2021 and 2020, respectively	219	150
2020 and 2019, respectively	59	69
2019 and 2018, respectively	23	26
Prior	6	20
Revolving Finance Receivables	0	0
Total	1,577	1,435
Customer | Latin America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	9	7
2022 and 2021, respectively	10	8
2021 and 2020, respectively	6	4
2020 and 2019, respectively	1	2
2019 and 2018, respectively	0	0
Prior	0	1
Revolving Finance Receivables	0	0
Total	26	22
Customer | Latin America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	2	2
2022 and 2021, respectively	4	5
2021 and 2020, respectively	1	1
2020 and 2019, respectively	0	1
2019 and 2018, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	7	9
Customer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	2	2
2022 and 2021, respectively	10	13
2021 and 2020, respectively	8	11
2020 and 2019, respectively	5	2
2019 and 2018, respectively	8	1
Prior	11	0
Revolving Finance Receivables	0	0
Total	44	29
Customer | Power | Current
Financing Receivable, Credit Quality Indicator
2023 and 2022, respectively	152	78
2022 and 2021, respectively	49	85
2021 and 2020, respectively	64	142
2020 and 2019, respectively	75	33
2019 and 2018, respectively	28	18
Prior	59	161
Revolving Finance Receivables	162	125
Total	589	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	0	0
Revolving Finance Receivables	0	0
Total	0	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	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	$ 3	$ 5