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Restructuring Activities - Schedule of Costs Related to the Organizational Design Transformation Program (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total cost of transformation program | $ 3.5 | $ 10.1 | $ 9.4 | $ 37.4
Cumulative cost incurred | 88.6 |  | 88.6 |
Professional Fees [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total cost of transformation program | 0.6 | 2.0 | 1.5 | 4.1
Cumulative cost incurred | 26.4 |  | 26.4 |
Retention and Separation [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total cost of transformation program | 2.9 | 7.9 | 7.8 | 33.1
Cumulative cost incurred | 61.3 |  | 61.3 |
Other [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total cost of transformation program | 0.0 | $ 0.2 | 0.1 | $ 0.2
Cumulative cost incurred | $ 0.9 |  | $ 0.9 |

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