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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of intangible assets $ 140.2 $ 134.9 $ 144.5
Estimated amortization expense, year ended March 31, 2024 134.7    
Estimated amortization expense, year ended March 31, 2025 128.3    
Estimated amortization expense, year ended March 31, 2026 118.7    
Estimated amortization expense, year ended March 31, 2027 113.4    
Estimated amortization expense, year ended March 31, 2028 $ 108.4