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Stockholders' Equity - Schedule of Adjustments to Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Unrealized net gains (losses) on defined benefit pension plan | $ 3.1 | $ 69.2 | $ (45.5) | $ 113.5
Unrealized gains (losses) on interest rate swaps | 3.1 | 69.2 | (45.5) | 113.5
Other comprehensive (loss) income before reclassifications, Tax Effect | (0.3) | (3.1) | 0.7 | (5.3)
Defined Benefit Obligation [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Unrealized net gains (losses) on defined benefit pension plan | 0.0 | (0.1) | 0.0 | (0.1)
Reclassification of losses into net earnings on defined benefit pension, Tax Effect | 0.1 | 0.1 | 0.1 | 0.1
Unrealized gains (losses) on interest rate swaps | 0.0 | (0.1) | 0.0 | (0.1)
Foreign Currency Translation [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Unrealized net gains (losses) on defined benefit pension plan | 3.1 | 69.3 | (45.5) | 113.6
Unrealized gains (losses) on interest rate swaps | 3.1 | 69.3 | (45.5) | 113.6
Other comprehensive (loss) income before reclassifications, Tax Effect | $ (0.4) | $ (3.1) | $ 0.6 | $ (5.4)

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