Cat Financial Financing Activities - Write Offs (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Write-offs by origination year
Total	$ 46	$ 27	$ 88	$ 57
Customer
Write-offs by origination year
2026/2025	0	0	0	0
2025/2024	10	5	22	11
2024/2023	11	10	23	19
2023/2022	11	5	20	12
2022/2021	7	3	10	6
Prior	4	2	7	5
Revolving Finance Receivables	3	2	6	4
Total	46	27	88	57
Customer \| North  America
Write-offs by origination year
2026/2025	0	0	0	0
2025/2024	5	3	9	5
2024/2023	7	6	14	11
2023/2022	7	2	13	6
2022/2021	4	2	6	4
Prior	3	2	5	3
Revolving Finance Receivables	3	2	6	4
Total	29	17	53	33
Customer \| EAME
Write-offs by origination year
2026/2025	0	0	0	0
2025/2024	2	1	3	2
2024/2023	1	2	2	3
2023/2022	1	0	2	1
2022/2021	1	1	1	1
Prior	0	0	1	0
Revolving Finance Receivables	0	0	0	0
Total	5	4	9	7
Customer \| Asia/  Pacific
Write-offs by origination year
2026/2025	0	0	0	0
2025/2024	1	1	4	1
2024/2023	1	1	3	2
2023/2022	1	1	1	1
2022/2021	1	0	1	1
Prior	0	0	0	0
Revolving Finance Receivables	0	0	0	0
Total	4	3	9	5
Customer \| Latin  America
Write-offs by origination year
2026/2025	0	0	0	0
2025/2024	2	0	3	0
2024/2023	2	1	4	2
2023/2022	2	2	4	3
2022/2021	1	0	2	0
Prior	1	0	1	1
Revolving Finance Receivables	0	0	0	0
Total	8	3	14	6
Customer \| Mining
Write-offs by origination year
2026/2025			0	0
2025/2024			3	3
2024/2023			0	1
2023/2022			0	1
2022/2021			0	0
Prior			0	0
Revolving Finance Receivables			0	0
Total			3	5
Customer \| Power
Write-offs by origination year
2026/2025			0	0
2025/2024			0	0
2024/2023			0	0
2023/2022			0	0
2022/2021			0	0
Prior			0	1
Revolving Finance Receivables			0	0
Total			0	1
Dealer
Write-offs by origination year
Total	$ 0	$ 0	$ 0	$ 0

Write-offs by origination year [Line Items]

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- Definition

Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

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-Paragraph 6
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- Definition

Amount of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable that can be withdrawn, repaid, and redrawn.

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Amount of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease.

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- Definition

Amount of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease.

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