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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Income Tax Disclosure [Abstract] |  |  |  |
Effective income tax rate (in percent) | 22.10% | 31.80% | 21.10% | 26.30%
Benefits that resulted from equity incentive awards |  |  | $ 34.0 | $ 22.7
Loss from mark-to-market adjustment on investment |  | $ 26.5 |  | $ 76.5
Realized gain (loss) on Starry | $ (91.5) |  |  |
Valuation allowance release on Starry | 22.7 |  |  |
Total amount of unrecognized tax benefits relating to uncertain tax positions | 49.3 |  | 49.3 |
Increase (decrease) in the total amount of unrecognized tax benefits relating to uncertain tax positions |  |  | 7.7 |
Increase in reserves for uncertain tax positions expected to be taken in current year |  |  | 7.7 |
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months | $ 11.9 |  | $ 11.9 |

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