Cat Financial Financing Activities - Amortized cost of finance receivables in the customer portfolio segment by origination year (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator
Total	$ 23,029	$ 22,449
Customer
Financing Receivable, Credit Quality Indicator
Total	21,517	20,571
Finance Receivables
Financing Receivable, Credit Quality Indicator
Total	23,029
Finance Receivables | Customer
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	9,451	8,742
2023 and 2022, respectively	5,892	5,504
2022 and 2021, respectively	3,164	3,649
2021 and 2020, respectively	1,721	1,383
2020 and 2019, respectively	510	493
Prior	202	252
Revolving Finance Receivables	577	548
Total	21,517	20,571
Finance Receivables | Customer | Current
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	9,366	8,650
2023 and 2022, respectively	5,742	5,372
2022 and 2021, respectively	3,058	3,545
2021 and 2020, respectively	1,661	1,331
2020 and 2019, respectively	489	466
Prior	189	233
Revolving Finance Receivables	572	540
Total	21,077	20,137
Finance Receivables | Customer | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	45	52
2023 and 2022, respectively	65	56
2022 and 2021, respectively	43	44
2021 and 2020, respectively	24	20
2020 and 2019, respectively	6	8
Prior	3	1
Revolving Finance Receivables	3	4
Total	189	185
Finance Receivables | Customer | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	14	18
2023 and 2022, respectively	22	21
2022 and 2021, respectively	14	15
2021 and 2020, respectively	8	7
2020 and 2019, respectively	3	3
Prior	1	1
Revolving Finance Receivables	1	2
Total	63	67
Finance Receivables | Customer | 91+ days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	26	22
2023 and 2022, respectively	63	55
2022 and 2021, respectively	49	45
2021 and 2020, respectively	28	25
2020 and 2019, respectively	12	16
Prior	9	17
Revolving Finance Receivables	1	2
Total	188	182
Finance Receivables | Customer | North America | Current
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	5,340	4,430
2023 and 2022, respectively	3,035	2,628
2022 and 2021, respectively	1,567	2,000
2021 and 2020, respectively	980	745
2020 and 2019, respectively	244	220
Prior	23	32
Revolving Finance Receivables	385	312
Total	11,574	10,367
Finance Receivables | Customer | North America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	30	28
2023 and 2022, respectively	42	31
2022 and 2021, respectively	29	24
2021 and 2020, respectively	18	14
2020 and 2019, respectively	5	7
Prior	1	1
Revolving Finance Receivables	3	4
Total	128	109
Finance Receivables | Customer | North America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	9	10
2023 and 2022, respectively	14	11
2022 and 2021, respectively	10	8
2021 and 2020, respectively	6	4
2020 and 2019, respectively	2	1
Prior	1	0
Revolving Finance Receivables	1	2
Total	43	36
Finance Receivables | Customer | North America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	13	12
2023 and 2022, respectively	37	23
2022 and 2021, respectively	26	18
2021 and 2020, respectively	16	9
2020 and 2019, respectively	6	4
Prior	2	1
Revolving Finance Receivables	1	2
Total	101	69
Finance Receivables | Customer | EAME | Current
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	1,235	1,336
2023 and 2022, respectively	874	895
2022 and 2021, respectively	532	588
2021 and 2020, respectively	285	258
2020 and 2019, respectively	92	111
Prior	72	105
Revolving Finance Receivables	0	0
Total	3,090	3,293
Finance Receivables | Customer | EAME | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	7	10
2023 and 2022, respectively	10	9
2022 and 2021, respectively	4	7
2021 and 2020, respectively	3	3
2020 and 2019, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total	25	30
Finance Receivables | Customer | EAME | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	3	4
2023 and 2022, respectively	4	3
2022 and 2021, respectively	1	3
2021 and 2020, respectively	1	1
2020 and 2019, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total	10	12
Finance Receivables | Customer | EAME | 91+ days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	3	7
2023 and 2022, respectively	14	17
2022 and 2021, respectively	8	15
2021 and 2020, respectively	6	8
2020 and 2019, respectively	4	3
Prior	1	1
Revolving Finance Receivables	0	0
Total	36	51
Finance Receivables | Customer | Asia/Pacific | Current
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	898	943
2023 and 2022, respectively	531	594
2022 and 2021, respectively	256	293
2021 and 2020, respectively	87	73
2020 and 2019, respectively	14	16
Prior	2	4
Revolving Finance Receivables	0	0
Total	1,788	1,923
Finance Receivables | Customer | Asia/Pacific | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	4	5
2023 and 2022, respectively	6	6
2022 and 2021, respectively	5	7
2021 and 2020, respectively	2	2
2020 and 2019, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	17	20
Finance Receivables | Customer | Asia/Pacific | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	1	2
2023 and 2022, respectively	1	3
2022 and 2021, respectively	2	3
2021 and 2020, respectively	1	2
2020 and 2019, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	5	10
Finance Receivables | Customer | Asia/Pacific | 91+ days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	4	1
2023 and 2022, respectively	1	5
2022 and 2021, respectively	2	3
2021 and 2020, respectively	1	3
2020 and 2019, respectively	1	1
Prior	0	0
Revolving Finance Receivables	0	0
Total	9	13
Finance Receivables | Customer | Mining | Current
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	924	1,039
2023 and 2022, respectively	755	686
2022 and 2021, respectively	444	381
2021 and 2020, respectively	206	121
2020 and 2019, respectively	67	68
Prior	34	27
Revolving Finance Receivables	21	66
Total	2,451	2,388
Finance Receivables | Customer | Mining | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	0	0
2023 and 2022, respectively	1	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	1	0
Finance Receivables | Customer | Mining | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	0	0
2023 and 2022, respectively	1	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	1
Prior	0	1
Revolving Finance Receivables	0	0
Total	1	2
Finance Receivables | Customer | Mining | 91+ days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	4	0
2023 and 2022, respectively	5	0
2022 and 2021, respectively	5	1
2021 and 2020, respectively	1	0
2020 and 2019, respectively	0	0
Prior	3	1
Revolving Finance Receivables	0	0
Total	18	2
Finance Receivables | Customer | Latin America | Current
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	800	750
2023 and 2022, respectively	363	520
2022 and 2021, respectively	220	219
2021 and 2020, respectively	60	59
2020 and 2019, respectively	8	23
Prior	2	6
Revolving Finance Receivables	0	0
Total	1,453	1,577
Finance Receivables | Customer | Latin America | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	4	9
2023 and 2022, respectively	6	10
2022 and 2021, respectively	5	6
2021 and 2020, respectively	1	1
2020 and 2019, respectively	0	0
Prior	2	0
Revolving Finance Receivables	0	0
Total	18	26
Finance Receivables | Customer | Latin America | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	1	2
2023 and 2022, respectively	2	4
2022 and 2021, respectively	1	1
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	4	7
Finance Receivables | Customer | Latin America | 91+ days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	2	2
2023 and 2022, respectively	6	10
2022 and 2021, respectively	8	8
2021 and 2020, respectively	4	5
2020 and 2019, respectively	1	8
Prior	1	11
Revolving Finance Receivables	0	0
Total	22	44
Finance Receivables | Customer | Power | Current
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	169	152
2023 and 2022, respectively	184	49
2022 and 2021, respectively	39	64
2021 and 2020, respectively	43	75
2020 and 2019, respectively	64	28
Prior	56	59
Revolving Finance Receivables	166	162
Total	721	589
Finance Receivables | Customer | Power | 31-60 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	0	0
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	0	0
Finance Receivables | Customer | Power | 61-90 days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	0	0
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	0	0
Finance Receivables | Customer | Power | 91+ days past due
Financing Receivable, Credit Quality Indicator
2024 and 2023, respectively	0	0
2023 and 2022, respectively	0	0
2022 and 2021, respectively	0	0
2021 and 2020, respectively	0	0
2020 and 2019, respectively	0	0
Prior	2	3
Revolving Finance Receivables	0	0
Total	$ 2	$ 3