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Note 8 - Goodwill and Intangible Assets - Estimated Amortization Expense (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
2021 $ 43.6  
2022 159.5  
2023 145.8  
2024 140.2  
2025 115.3  
2026 and thereafter 660.9  
Total $ 1,265.3 $ 1,384.8