Revenue - Narrative (Details) - Infrastructure $ in Millions	9 Months Ended
Sep. 30, 2021 USD ($)
Revenue from External Customer [Line Items]
Contract assets, increase due to new projects	$ 47.7
Contract assets, reclassified to receivables	32.7
Contract liabilities, increase due to new projects	145.3
Contract liabilities, revenue recognized	91.1
Remaining commitment obligations, amount	7.9
Banker Steel Acquisition
Revenue from External Customer [Line Items]
Contract assets, increase due to contracts acquired in acquisition	1.9
Contract liabilities, increase due to projects acquired in acquisition	$ 55.0

Contract With Customer, Asset, Increase Due to New Projects

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- Definition

Contract With Customer, Liability, Increase Due to New Projects

+ References

No definition available.

+ Details

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- Definition

Contract With Customer, Liability, Revenue Recognized Including New Contracts

+ References

No definition available.

+ Details

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- Definition

Revenue, Remaining Commitment Obligations, Amount

+ References

No definition available.

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- Definition

Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, from business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

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- Definition

Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

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- Definition

Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from business combination.

+ References

+ Details

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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.

+ References

No definition available.

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