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v3.22.2

Other Retirement Plans (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 USD ($) employee | Jun. 30, 2021 USD ($) employee | Jun. 30, 2022 USD ($) employee | Jun. 30, 2021 USD ($) employee
Covered Employees and Contributions, Multiemployer Plans [Line Items] |  |  |  |
Multiemployer plan, employer contribution, cost | $ 36.2 | $ 29.7 | $ 66.4 | $ 54.4
Pension |  |  |  |
Covered Employees and Contributions, Multiemployer Plans [Line Items] |  |  |  |
Multiemployer plan, employer contribution, cost | 22.3 | 21.7 | 39.3 | 44.2
Other Multiemployer |  |  |  |
Covered Employees and Contributions, Multiemployer Plans [Line Items] |  |  |  |
Multiemployer plan, employer contribution, cost | $ 13.9 | $ 8.0 | $ 27.1 | $ 10.2
Low |  |  |  |
Covered Employees and Contributions, Multiemployer Plans [Line Items] |  |  |  |
Multiemployer plans, covered employees (in number of employees) | employee | 6,672 | 2,532 | 6,601 | 2,412
High |  |  |  |
Covered Employees and Contributions, Multiemployer Plans [Line Items] |  |  |  |
Multiemployer plans, covered employees (in number of employees) | employee | 7,136 | 6,979 | 7,136 | 6,979

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