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Investment in Other Affiliates (Detail) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022
Investments in and Advances to Affiliates, Schedule of Investments [Abstract] |  |  |
Impairment | $ 7.7 |  |
Investments in nonmarketable securities of other companies |  | $ 71.9 | $ 50.3

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