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Revenue from Contracts with Customers (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenue From Contract With Customers [Line Items] |  |  |
Change in estimate of transaction price | $ 12,300,000 |  |
Unbilled revenues for unapproved change orders | 25,100,000 | $ 29,800,000 |
Claims on contract assets | 0 | 6,700,000 |
Claim amounts within accounts receivable | 6,900,000 | 15,400,000 |
Contractually billed amounts and retention related to contracts with unapproved change orders and claims | 172,400,000 | 157,700,000 |
Net contract liabilities, construction | 1,690,994,000 | 1,261,056,000 |
Contract asset impairment | 0 | 0 |
Accounts receivable, retainage | $ 703,200,000 | 555,900,000 |
Accounts receivable, retainage estimated to be collected in next fiscal year | 86.00% |  |
Accounts payable, retainage | $ 121,500,000 | 93,600,000 |
Accounts payable, retainage estimated to be paid in next fiscal year | 89.00% |  |
Remaining performance obligations | $ 10,102,199,000 |  |
UNITED STATES |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Change in total estimated cost or anticipated contract value | 66,319,000 | 29,057,000 | $ 48,403,000
Performance obligation satisfied in previous period | 24,557,000 | 16,464,000 | 0
Remaining performance obligations | 9,916,733,000 |  |
Minimum |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Change in total estimated cost or anticipated contract value | 1,000,000 |  |
Performance obligation satisfied in previous period | 1,000,000 |  |
2024Acquisitions |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Increase in contract assets from acquisitions | 2,300,000 |  |
Increase in contract liabilities from acquisitions | 24,300,000 |  |
Excluding2024Acquisitions |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Increase in net contract liabilities | 415,200,000 |  |
United States Electrical Construction And Facilities Services |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Change in estimate of transaction price | 8,400,000 |  |
United States Electrical Construction And Facilities Services | UNITED STATES |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Change in total estimated cost or anticipated contract value | 27,977,000 | 12,535,000 | 33,463,000
Performance obligation satisfied in previous period | 14,006,000 | 3,350,000 |
Remaining performance obligations | 3,068,396,000 |  |
United States Mechanical Construction And Facilities Services |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Change in estimate of transaction price | 3,900,000 |  |
United States Mechanical Construction And Facilities Services | UNITED STATES |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Change in total estimated cost or anticipated contract value | 38,342,000 | 10,864,000 | 13,679,000
Performance obligation satisfied in previous period | 10,551,000 | 13,114,000 |
Remaining performance obligations | 5,463,096,000 |  |
United States Building Services | UNITED STATES |  |  |
Revenue From Contract With Customers [Line Items] |  |  |
Change in total estimated cost or anticipated contract value | 0 | $ 5,658,000 | $ 1,261,000
Remaining performance obligations | $ 1,246,642,000 |  |

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- Definition Amount of increase (decrease) in gross profit recognized for cumulative catch-up adjustment from change in estimate of transaction price which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained. + References No definition available. + Details
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