Other Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

Schedule of Covered Employees and Contributions, Multiemployer Plans

Total contributions to multiemployer plans and the related number of employees covered by these plans for the periods indicated were as follows:

	Multiemployer Plans
	Covered Employees		Contributions (in millions)
	Low	High	Pension		Other Multiemployer		Total
For the Three Months Ended September 30:
2023	7,760	11,025	$	34.8	$	15.2	$	50.0
2022	6,774	7,136	$	23.0	$	14.5	$	37.5
For the Nine Months Ended September 30:
2023	6,806	11,025	$	77.9	$	45.1	$	123.0
2022	6,601	7,136	$	62.3	$	41.6	$	103.9