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Note 8 - Goodwill and Intangible Assets - Estimated Amortization Expense (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
2021 $ 135.4  
2022 157.5  
2023 144.8  
2024 139.1  
2025 114.9  
2026 110.6  
2027 and thereafter 553.4  
Total $ 1,355.7 $ 1,384.8