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Revenue Recognition and Related Balance Sheet Accounts - Additional Information (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) unit numberOfProjects Customer | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($)
Disaggregation of Revenue [Line Items] |  |  |
Remaining performance obligation | $ 6,840.0 |  | $ 5,900.0
Revenues recognized related to change orders and claims | $ 443.7 |  | 367.8
Number of delayed transmission projects due to changes orders and claims | numberOfProjects | 2 |  |
Number of projects that experienced a significant impact due accelerated timeline | unit | 1 |  |
Change in contract estimates, favorable (unfavorable) impact on revenues | $ 33.0 | $ 54.3 |
Change in contract estimates, (favorable) unfavorable impact on operating results, amount | $ (29.3) | $ (42.9) |
Change in contract estimates, (favorable) unfavorable impact on operating results, percent | (5.30%) | (11.50%) |
Percent of total revenues recognized associated with revenue recognition method | 51.20% | 44.40% |
Revenue recognized related to amounts in contract liabilities outstanding at the beginning of period | $ 507.2 | $ 245.7 |
Current retainage balances | 353.6 |  | 406.7
Non-current retainage balances | 108.4 |  | 93.9
Unbilled receivables | $ 792.2 |  | $ 679.0
Ownership percentage of customer in joint venture |  |  | 50.00%
Customer Concentration Risk |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Number of customers representing ten percent or more of net receivable position | Customer | 1 |  |
Customer Concentration Risk | One Customer | Accounts Receivable |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk percentage | 13.00% |  | 11.00%
Customer Concentration Risk | Customer With Joint Venture Interest | Accounts Receivable |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk percentage | 10.00% |  | 11.00%
Customer Concentration Risk | Customer With Joint Venture Interest | Revenue Benchmark |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk percentage | 11.00% |  |
Accounts payable and accrued expenses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Unearned revenues, current portion | $ 47.2 |  | $ 51.8
Domestic Communications Project |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Change in contract estimates, (favorable) unfavorable impact on operating results, amount |  | $ 14.8 |
Aggregate consideration for projects | $ 117.9 |  |
Percentage of project completion | 63.00% |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of remaining performance obligation expected to be recognized |  |  | 81.80%
Recognition period for remaining performance obligation |  |  | 12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of remaining performance obligation expected to be recognized | 78.40% |  |
Recognition period for remaining performance obligation | 12 months |  |

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