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Business Combinations - Summary of Unaudited Pro Forma Historical Results (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Business Combinations [Abstract] |  |
Total revenues | $ 2,438.1 | $ 2,171.0
Net earnings attributable to controlling interests | $ 438.6 | $ 382.2
Basic net earnings per share | $ 2.10 | $ 1.96
Diluted net earnings per share | $ 2.05 | $ 1.92

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