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Income Taxes (Tables) | 3 Months Ended
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Mar. 31, 2024
Income Taxes |
Schedule of provision for income taxes and effective tax rate | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​
​ |  | March 31, |
​ | ​ | 2024 | ​ | 2023 | ​
Provision for income taxes | ​ | $ | (110.7) | ​ | $ | (117.2) | ​
Effective tax rate | ​ |  | 16.7 | % |  | 20.9 | %

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