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Business Combinations, Divestitures, Discontinued Operations and Assets and Liabilities Held for Sale - Summary of Discontinued Operations (Detail) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Oct. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |
Total revenues |  | $ 94.2 | $ 308.6 | $ 79.2
Pretax (loss) earnings from operations |  | (16.3) | 16.2 | 6.6
Pretax loss on divestitures and sales of assets | $ (26.3) | (24.0) | (0.7) | (6.0)
Pretax (loss) earnings |  | (40.3) | 15.5 | 0.6
Income tax (benefit) expense |  | (9.4) | 5.0 | 0.1
(Loss) Earnings from discontinued operations, net of income tax (benefit) expense |  | (30.9) | 10.5 | 0.5
Net cash provided by (used for) operating activities |  | 0.6 | (31.6) | (8.2)
Additions to property, plant and equipment |  | (3.0) | (15.5) | (3.7)
Proceeds from divestitures and sales of assets |  | 372.0 | 249.9 | 0.0
Net cash provided by (used for) investing activities |  | $ 369.0 | $ 234.4 | $ (3.7)

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