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Revenue - Schedule of Construction Segment Revenue (Details) - Infrastructure $ in Millions	Mar. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 513.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 511.5
Remaining performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 2.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years
Commercial
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 159.1
Commercial | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 159.1
Remaining performance obligation period	1 year
Commercial | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 0.0
Commercial | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years
Convention
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 67.3
Convention | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 67.3
Remaining performance obligation period	1 year
Convention | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 0.0
Convention | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years
Healthcare
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 33.8
Healthcare | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 33.8
Remaining performance obligation period	1 year
Healthcare | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 0.0
Healthcare | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years
Industrial
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 184.5
Industrial | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 182.2
Remaining performance obligation period	1 year
Industrial | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 2.3
Industrial | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years
Transportation
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 16.0
Transportation | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 16.0
Remaining performance obligation period	1 year
Transportation | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 0.0
Transportation | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years
Government
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 39.6
Government | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	39.6
Government | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	0.0
Leisure
Segment Reporting Information [Line Items]
Remaining performance obligations	3.5
Leisure | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 3.5
Remaining performance obligation period	1 year
Leisure | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 0.0
Leisure | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years
Other
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 10.0
Other | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period One
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 10.0
Remaining performance obligation period	1 year
Other | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligations	$ 0.0
Other | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Revenue, Remaining Performance Obligation, Period Two
Segment Reporting Information [Line Items]
Remaining performance obligation period	5 years

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

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+ References

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