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v3.21.2

Commitments and Contingencies (Details) |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Jul. 07, 2021 USD ($) | Sep. 20, 2018 subclass | Jul. 31, 2021 USD ($) | Jul. 31, 2021 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Standby letters of credit |  |  | $ 148,800,000 | $ 148,800,000
Surety bonds |  |  | 679,800,000 | 679,800,000
Bucio |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, number of certified subclasses | subclass |  | 4 |  |
Energy Savings Contracts |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Guarantee obligation |  |  | 238,000,000 | 238,000,000
Minimum |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Amount of reasonably possible loss |  |  | 0 | 0
Maximum |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Amount of reasonably possible loss |  |  | 6,000,000 | 6,000,000
Pending Litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency accrual |  |  | 14,400,000 | 14,400,000
Settled Litigation | Bucio |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency accrual |  |  | 142,900,000 | 142,900,000
Settlement amount | $ 140,000,000 |  |  |
Settlement reserve |  |  | 112,900,000 | 142,900,000
Settled Litigation | Bucio | Other Current Liabilities |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency accrual |  |  | $ 2,900,000 | $ 2,900,000

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