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Accounting for Leases as a Lessor - Lessor Activity Included in Income Statement (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2025 | Apr. 30, 2024
Leases [Abstract] |  |  |  |
Interest income from sales-type leases and direct financing leases | $ 188 | $ 162 | $ 374 | $ 318
Lease income from operating leases | 539 | 594 | 1,086 | 1,193
Total lease income | $ 727 | $ 756 | $ 1,460 | $ 1,511

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- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-5 + Details
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Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-6A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479016/842-30-45-3 + Details
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- Definition Amount of interest income from net investment in sales-type and direct financing leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-5 + Details
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