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