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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of intangible assets $ 134.9 $ 144.5 $ 152.1
Estimated amortization expense, year ended March 31, 2023 130.3    
Estimated amortization expense, year ended March 31, 2024 125.5    
Estimated amortization expense, year ended March 31, 2025 123.4    
Estimated amortization expense, year ended March 31, 2026 119.6    
Estimated amortization expense, year ended March 31, 2027 $ 116.6