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Employee Benefits (Tables)
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Workers' Compensation Known Claims and IBNR Reserves
Workers’ compensation known claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in millions):
September 30, 2025December 31, 2024
Included in other current liabilities$9.0 $9.2 
Included in other long-term liabilities21.4 18.5 
$30.4 $27.7 
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):
 September 30, 2025December 31, 2024
Included in other non-current assets$4.6 $4.4 
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, 2024
105,957 $156.41 131,134 $133.04 7,861 $242.85 
Granted82,027 171.12 46,556 170.99 11,495 170.37 
Vested(94,763)155.01 (63,985)106.50 (7,775)242.22 
Forfeited/Cancelled(1,201)174.71 — — (560)190.30 
Nonvested awards/units at September 30, 202592,020 $170.72 113,705 $163.50 11,021 $170.37 
Schedule of Stock Compensation Expenses
The following table summarizes the share-based compensation expense recognized by award type (in millions):
 Three months ended September 30,Nine months ended September 30,
 2025202420252024
Common Stock Awards$2.1 $1.8 $7.7 $4.8 
Non-Employee Common Stock Awards0.3 0.2 0.7 0.6 
Performance-Based Stock Awards1.8 1.7 5.6 5.3 
Liability Performance-Based Stock Awards0.6 0.3 1.1 1.1 
Performance-Based Restricted Stock Units0.5 0.5 1.4 1.4 
$5.3 $4.5 $16.5 $13.2 
We recorded the following stock compensation expense by income statement category (in millions):
 Three months ended September 30,Nine months ended September 30,
 2025202420252024
Cost of sales$0.3 $0.2 $0.8 $0.8 
Selling0.1 0.2 0.4 0.4 
Administrative4.9 4.1 15.3 12.0 
$5.3 $4.5 $16.5 $13.2 
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 September 30, 2025
 Unrecognized
Compensation Expense
on Unvested Awards		Weighted Average
Remaining
Vesting Period
Common Stock Awards$11.4 2.0 years
Performance-Based Stock Awards9.3 1.7 years
Performance-Based Restricted Stock Units1.0 0.5 years
Total unrecognized compensation expense related to unvested awards$21.7