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Commitments and Contingencies - Narrative (Details) | Sep. 20, 2018 subclass | Oct. 31, 2020 USD ($) | Oct. 31, 2019 USD ($)
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Loss Contingencies [Line Items] |  |  |
Letters of credit |  | $ 153,100,000 |
Surety bonds |  | $ 632,900,000 |
Subsidiary ownership interest percentage |  | 33.00% |
Minimum |  |  |
Loss Contingencies [Line Items] |  |  |
Subsidiary ownership interest percentage |  | 20.00% |
Estimate of reasonably possible loss |  | $ 0 |
Maximum |  |  |
Loss Contingencies [Line Items] |  |  |
Subsidiary ownership interest percentage |  | 50.00% |
Estimate of reasonably possible loss |  | $ 4,000,000 |
Bucio |  |  |
Loss Contingencies [Line Items] |  |  |
Number of certified subclasses | subclass | 4 |  |
Energy Savings Contracts |  |  |
Loss Contingencies [Line Items] |  |  |
Guarantee obligation |  | 182,800,000 | $ 174,800,000
Performance Guarantee | Joint Venture |  |  |
Loss Contingencies [Line Items] |  |  |
Total guarantee |  | 30,000,000 |
Pending Litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency amount accrued for probable losses |  | $ 14,700,000 |

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- Definition The amount of bonds, as of the end of the accounting period, issued by a second party, guaranteeing the fulfillment of the Company's obligations to a third party. In the event that the Company does not meet its obligations, the third party will recover its losses via the bond. + References No definition available. + Details
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