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Share-Based Compensation, CVARs, Employee Stock Purchase Plan and Subsidiary Equity Incentive Plans (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Subsidiary Equity Incentive Plans [Member]        
Subsidiary Equity Incentive Plans [Abstract]        
Share-based compensation expense $ 23.3 $ 13.7 $ 53.1 $ 37.8
CVARs [Member] | March 2020 CVAR Grants [Member]        
Share-Based Compensation [Abstract]        
Number of shares outstanding (in shares) 27,531,825   27,531,825  
Equity instruments vested and settled (in shares)     4,499,113  
Number of shares issued (in shares)     1,445,420  
CVARs [Member] | November 2021 CVAR Grants [Member]        
Share-Based Compensation [Abstract]        
Number of shares issued (in shares)     955,782  
CVARs [Member] | RSL 2021 EIP [Member] | November 2021 CVAR Grants [Member]        
Capped Value Appreciation Rights [Abstract]        
Non-vested balance, beginning (in shares)     3,222,645  
Vested (in shares)     (955,782)  
Forfeited (in shares)     (128,377)  
Non-vested balance, ending (in shares) 2,138,486   2,138,486