Cat Financial Financing Activities - Write Offs (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Write-offs by origination year
Total	$ 42	$ 30
Customer
Write-offs by origination year
2026/2025	0	0
2025/2024	12	6
2024/2023	12	9
2023/2022	9	7
2022/2021	3	3
Prior	3	3
Revolving Finance Receivables	3	2
Total	42	30
Customer \| North  America
Write-offs by origination year
2026/2025	0	0
2025/2024	3	2
2024/2023	8	5
2023/2022	6	4
2022/2021	2	2
Prior	2	1
Revolving Finance Receivables	3	2
Total	24	16
Customer \| EAME
Write-offs by origination year
2026/2025	0	0
2025/2024	1	1
2024/2023	1	1
2023/2022	1	1
2022/2021	0	0
Prior	1	0
Revolving Finance Receivables	0	0
Total	4	3
Customer \| Asia/  Pacific
Write-offs by origination year
2026/2025	0	0
2025/2024	3	0
2024/2023	1	1
2023/2022	1	0
2022/2021	0	1
Prior	0	0
Revolving Finance Receivables	0	0
Total	5	2
Customer \| Latin  America
Write-offs by origination year
2026/2025	0	0
2025/2024	1	0
2024/2023	2	1
2023/2022	1	1
2022/2021	1	0
Prior	0	1
Revolving Finance Receivables	0	0
Total	5	3
Customer \| Mining
Write-offs by origination year
2026/2025	0	0
2025/2024	4	3
2024/2023	0	1
2023/2022	0	1
2022/2021	0	0
Prior	0	0
Revolving Finance Receivables	0	0
Total	4	5
Customer \| Power
Write-offs by origination year
2026/2025		0
2025/2024		0
2024/2023		0
2023/2022		0
2022/2021		0
Prior		1
Revolving Finance Receivables		0
Total		1
Dealer
Write-offs by origination year
Total	$ 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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-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-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.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
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-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

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-Paragraph 6
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-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

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- Definition

Amount of writeoff of financing receivable that can be withdrawn, repaid, and redrawn.

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- Definition

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

+ References

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- Definition

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

+ References

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- Definition

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

+ References

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- Definition

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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