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Business Combinations - Unaudited Pro Forma Results (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Business Combinations [Abstract] |  |
Total revenues | $ 4,357.6 | $ 3,736.9
Net income | $ 890.5 | $ 703.8
Net income per share: |  |
Basic | $ 3.18 | $ 2.53
Diluted | $ 3.17 | $ 2.52

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