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Intangible Assets and Goodwill - Goodwill by Reporting Segment (Details)
$ in Millions
6 Months Ended
Sep. 30, 2022
USD ($)
unit
Mar. 31, 2022
USD ($)
Goodwill By Reporting Segment [Line Items]    
Goodwill $ 6,673.6 $ 6,673.6
Number of reporting units | unit 2  
Semiconductor Products Reporting Unit    
Goodwill By Reporting Segment [Line Items]    
Goodwill $ 6,654.4  
Technology Licensing Reporting Unit    
Goodwill By Reporting Segment [Line Items]    
Goodwill $ 19.2