Other Retirement Plans (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) employee	Sep. 30, 2021 USD ($) employee	Sep. 30, 2022 USD ($) employee	Sep. 30, 2021 USD ($) employee
Covered Employees and Contributions, Multiemployer Plans [Line Items]
Multiemployer plan, employer contribution, cost	$ 37.5	$ 48.6	$ 103.9	$ 103.0
Pension
Covered Employees and Contributions, Multiemployer Plans [Line Items]
Multiemployer plan, employer contribution, cost	23.0	36.9	62.3	81.1
Other Multiemployer
Covered Employees and Contributions, Multiemployer Plans [Line Items]
Multiemployer plan, employer contribution, cost	$ 14.5	$ 11.7	$ 41.6	$ 21.9
Low
Covered Employees and Contributions, Multiemployer Plans [Line Items]
Multiemployer plans, covered employees (in number of employees) | employee	6,774	5,116	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