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Project Assets - Additional Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2026 USD ($) | Apr. 30, 2025 USD ($) | Apr. 30, 2026 USD ($) project | Apr. 30, 2025 USD ($) | Oct. 31, 2025 USD ($) project
Project Assets |  |  |  |  |
Number of project assets | project |  |  | 12 |  | 12
Impairment expense related to project assets | $ 41.5 | $ 0.0 |  | $ 0.0 |
Long-term project assets construction in progress | 1.1 |  | $ 1.1 |  | $ 0.8
Power Purchase Agreement |  |  |  |  |
Project Assets |  |  |  |  |
Sale leaseback transaction, net book value | $ 166.4 |  | $ 166.4 |  | $ 216.1

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- Definition The net book value of the asset(s) sold in connection with the sale of the property to another party and lease back to the seller. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 840 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481266/840-40-55-50 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 840 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 52 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481266/840-40-55-52 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 840 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 51 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481266/840-40-55-51 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479741/842-40-50-2 + Details
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