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Employee Benefits (Tables)
 12 Months Ended
Dec. 31, 2024
Retirement Benefits [Abstract]  
Schedule of Workers' Compensation Known Claims and IBNR Reserves
Workers’ compensation known claims and IBNR reserves included on the Consolidated Balance Sheets were as follows (in millions):
As of December 31,
20242023
Included in other current liabilities$9.2 $9.5 
Included in other long-term liabilities18.5 17.0 
$27.7 $26.5 
Schedule of Insurance Receivable for Claims This receivable offsets an equal liability included within the reserve amounts noted above and was as follows (in millions):
As of December 31,
20242023
Included in other non-current assets$4.4 $3.0 
Schedule of Contributions to Multiemployer Pensions and Health and Welfare Benefit Plans
Our contributions to multiemployer pension and health and welfare benefit plans were as follows (in millions):
Years ended December 31,
202420232022
Pension plans$2.8 $3.6 $2.9 
Health & welfare plans2.9 3.7 3.1 
Total contributions$5.7 $7.3 $6.0 
Schedule of Equity-Based Awards for Employees
Amounts and changes for each category of equity-based award were as follows:
Common Stock AwardsPerformance-Based Stock AwardsPerformance-Based Restricted Stock Units
AwardsWeighted Average Grant Date Fair Value Per ShareAwardsWeighted Average Grant Date Fair Value Per ShareUnitsWeighted Average Grant Date Fair Value Per Share
Nonvested awards/units at December 31, 2023116,482 $103.02 148,459 $108.83 14,382 $111.71 
Granted45,166 230.55 35,320 205.96 8,228 242.85 
Vested(55,017)104.00 (51,215)111.12 (14,271)111.71 
Forfeited/Cancelled(674)175.93 (1,430)205.96 (478)212.37 
Nonvested awards/units at December 31, 2024105,957 $156.41 131,134 $133.04 7,861 $242.85 
Schedule of Stock Compensation Expenses
The following table summarizes the share-based compensation expense recognized by award type (in millions):

Years ended December 31,
202420232022
Common Stock Awards$6.8 $7.1 $6.2 
Non-Employee Common Stock Awards0.8 0.7 0.5 
Performance-Based Stock Awards6.9 6.3 5.4 
Liability Performance-Based Stock Awards3.0 0.3 0.5 
Performance-Based Restricted Stock Units1.9 1.5 1.2 
$19.4 $15.9 $13.8 
We recorded the following stock compensation expense, by income statement category (in millions):
Years ended December 31,
202420232022
Cost of sales$1.1 $0.9 $0.6 
Selling0.6 0.4 0.5 
Administrative17.7 14.6 12.7 
$19.4 $15.9 $13.8 
Schedule of Unrecognized Share-Based Compensation Expense Related to Unvested Awards
Unrecognized share-based compensation expense related to unvested awards was as follows (in millions):
As of December 31, 2024
Unrecognized
Compensation Expense
on Unvested Awards		Weighted Average
Remaining
Vesting Period
Common Stock Awards$9.8 1.6 years
Performance-Based Stock Awards6.9 1.5 years
Performance-Based Restricted Stock Units0.5 0.3 years
Total unrecognized compensation expense related to unvested awards$17.2