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Commitments and Contingencies - Performance and Payment Bonds (Details) - Performance and Payment Bonds $ in Millions, $ in Millions | Dec. 31, 2025 USD ($) | Dec. 31, 2025 CAD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 CAD ($)
--- | --- | --- | --- | ---
Commitments and Contingencies [Line Items] |  |  |  |
Bonded projects, estimated costs to complete | $ 4,600.0 |  | $ 2,200.0 |
Proportionately Consolidated Non-Controlled Joint Venture |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |
Outstanding bonds, amount | 7.1 | $ 9.7 | 6.7 | $ 9.7
Subsidiaries |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |
Outstanding bonds, amount | 10,900.0 |  | 7,600.0 |
Subsidiaries | Proportionately Consolidated Non-Controlled Joint Venture |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |
Outstanding bonds, amount | $ 1,100.0 |  | $ 838.7 |

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