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Share-Based Compensation Plans - Additional Information (Detail) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2025 USD ($) StockPlan $ / shares shares | Dec. 31, 2024 USD ($) $ / shares | Dec. 31, 2023 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock option compensation | $ 8.1 | $ 8.5 | $ 8.0
Maximum percentage of stock options granted | 200.00% |  |
Total compensation cost related to non-vested stock options not yet recognized | $ 17.7 |  |
Expected compensation cost recognized over the weighted-average period | 1 year 9 months 18 days |  |
Accrued liabilities | $ 152.3 | 169.1 |
Weighted Average Grant-Date Fair Value, Vested | $ / shares | $ 77.8 |  |
Share-Based Payment Arrangement, Expense, after Tax | $ 1.0 | 0.1 | 0.3
Employee Stock Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expiration term for stock granted | 10 years |  |
Aggregate number of shares of common stock reserved for issuance which can be granted | shares | 2,550,000 |  |
Number of stock option plans | StockPlan | 2 |  |
Stock option compensation | $ 8.1 | 8.5 | 8.0
Employee Stock Option | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 2 years |  |
Employee Stock Option | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 5 years |  |
Stock Equivalent Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expiration term for stock granted | 10 years |  |
Total intrinsic value exercised | $ 13.5 | 22.4 |
Accrued liabilities | 12.5 |  |
Compensation cost | $ 1.8 | $ 6.5 | $ 13.5
Weighted Average Grant-Date Fair Value, Vested | $ / shares | $ 107.1 | $ 130.3 | $ 94.4
Total intrinsic value of options outstanding | $ 34.4 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value | 3.0 |  |
ProceedsFromStockOptionsExercised | 6.2 | $ 12.8 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value | $ 16.4 | $ 16.4 |
Stock Equivalent Units [Member] | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 6 months |  |
Stock Equivalent Units [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Range of stock vesting period | 5 years |  |

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