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Employee Benefits (Tables) | 9 Months Ended
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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, 2025 |  | December 31, 2024
Included in other current liabilities | $ | 9.0 |  |  | $ | 9.2 |
Included in other long-term liabilities | 21.4 |  |  | 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, 2025 |  | December 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 Awards |  | Performance-Based Stock Awards |  | Performance-Based Restricted Stock Units
| Awards |  | Weighted Average Grant Date Fair Value Per Share |  | Awards |  | Weighted Average Grant Date Fair Value Per Share |  | Units |  | Weighted 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 |
Granted | 82,027 |  |  | 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, 2025 | 92,020 |  |  | $ | 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,
| 2025 |  | 2024 |  | 2025 |  | 2024
Common Stock Awards | $ | 2.1 |  |  | $ | 1.8 |  |  | $ | 7.7 |  |  | $ | 4.8 |
Non-Employee Common Stock Awards | 0.3 |  |  | 0.2 |  |  | 0.7 |  |  | 0.6 |
Performance-Based Stock Awards | 1.8 |  |  | 1.7 |  |  | 5.6 |  |  | 5.3 |
Liability Performance-Based Stock Awards | 0.6 |  |  | 0.3 |  |  | 1.1 |  |  | 1.1 |
Performance-Based Restricted Stock Units | 0.5 |  |  | 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,
| 2025 |  | 2024 |  | 2025 |  | 2024
Cost of sales | $ | 0.3 |  |  | $ | 0.2 |  |  | $ | 0.8 |  |  | $ | 0.8 |
Selling | 0.1 |  |  | 0.2 |  |  | 0.4 |  |  | 0.4 |
Administrative | 4.9 |  |  | 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 Awards | 9.3 |  |  | 1.7 years
Performance-Based Restricted Stock Units | 1.0 |  |  | 0.5 years
Total unrecognized compensation expense related to unvested awards | $ | 21.7 |  |  |

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