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Goodwill and Other Intangible Assets - Narrative (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated amortization expense, remainder of 2021 $ 24.5
Estimated amortization expense, 2022 94.1
Estimated amortization expense, 2023 90.5
Estimated amortization expense, 2024 89.2
Estimated amortization expense, 2025 87.4
Estimated amortization expense, 2026 84.4
Estimated amortization expense, in later years $ 680.7