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Intangible Assets and Goodwill - Intangible Assets, by Major Class (Details) - USD ($)
$ in Millions
6 Months Ended
Sep. 30, 2022
Mar. 31, 2022
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ (4,115.2) $ (3,745.4)
Gross Amount 7,820.1 7,788.5
Net Amount 3,704.9 4,043.1
Amortization Expense    
2023 374.1  
2024 669.0  
2025 535.3  
2026 464.3  
2027 $ 378.8  
Minimum    
Amortization Expense    
Useful life 1 year  
Maximum    
Amortization Expense    
Useful life 15 years  
In-process research and development    
Indefinite-lived Intangible Assets [Line Items]    
In-process research and development $ 6.4 6.4
Core and developed technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 7,412.4 7,390.2
Accumulated Amortization (3,903.0) (3,571.5)
Net Amount 3,509.4 3,818.7
Customer-related    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 199.8 200.3
Accumulated Amortization (119.9) (112.4)
Net Amount 79.9 87.9
Software licenses    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 201.2 191.2
Accumulated Amortization (92.0) (61.2)
Net Amount 109.2 130.0
Distribution rights and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 0.3 0.4
Accumulated Amortization (0.3) (0.3)
Net Amount $ 0.0 $ 0.1