Commitments and Contingencies - Narrative (Details) $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($) employee collective_bargaining_agreement
Loss Contingencies [Line Items]
Number of collective bargaining agreements that are national or regional in scope \| collective_bargaining_agreement	2
Minimum
Loss Contingencies [Line Items]
Number of employees \| employee	34,000
Number of collective bargaining agreements between our individual subsidiaries and local unions \| collective_bargaining_agreement	450
Surety Bond [Member]
Loss Contingencies [Line Items]
Aggregate estimated exposure, certain performance obligations \| $	$ 1,500.0
Aggregate estimated exposure, certain performance obligations, percentage	26.00%
Aggregate estimated exposure, other contractual obligations \| $	$ 48.1
Unionized Employees Concentration Risk [Member] \| Workforce Subject to Collective Bargaining Arrangements [Member]
Loss Contingencies [Line Items]
Percentage of employees represented by unions	60.00%

Number of persons employed by the Entity

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Aggregate Estimated Exposure, Assuming Defaults on Certain Performance Obligations

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Aggregate Estimated Exposure, Assuming Defaults on Other Contractual Obligations

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Number of collective bargaining agreements between our individual subsidiaries and local unions.

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Collective Bargaining Agreements, National or Regional, Number

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

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