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Contracts with Customers - Summary of Contract Assets and Contract Liabilities (Parenthetical) (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
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Revenue From Contract With Customer [Abstract] |  |
Contract retentions | $ 94.3 | $ 93.8
Contract retentions, not expected to be paid in next 12 months | 52.3 |
Contract assets, unapproved change orders, claims, and requests | $ 106.0 | $ 116.6

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- Definition Contract receivable retainage asset (liabilities) net, due after one year. + References No definition available. + Details
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- Definition Contract receivable retainage assets (Liabilities) net. + References No definition available. + Details
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- Definition Amount of billed or unbilled claims or other similar items subject to uncertainty concerning their determination or ultimate realization under long-term contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 910 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123353855&loc=SL119991585-234733 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(c)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- References No definition available. + Details
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