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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

X

- Definition

Reflects the amount of estimated costs to complete projects that are secured by outstanding performance and/or payment bonds as of the balance sheet date.

+ References

No definition available.

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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