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Commitments and Contingencies (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2021 USD ($)
Other Commitments [Line Items] |
Purchase orders outstanding | $ 18.0
Purchase orders outstanding, term | 9 months
Performance Guarantee |
Other Commitments [Line Items] |
Bonds outstanding | $ 1,200.0
Estimated remaining costs for bonded projects | 632.8
Contingencies Excluding Wildfire and Health Insurance |
Other Commitments [Line Items] |
Insurance coverage deductible | 1.0
Wildfire |
Other Commitments [Line Items] |
Insurance coverage deductible | 2.0
Health Insurance |
Other Commitments [Line Items] |
Insurance coverage deductible | $ 0.2

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