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Intangible Assets and Goodwill (Future Estimated Amortization Expense) (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2021 $ 222.2
2022 222.2
2023 222.2
2024 220.9
2025 214.5
Thereafter $ 1,498.2