v3.24.1.1.u2
Fair Value Measurements (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Fair Value Measurements [Abstract]      
Investments $ 4.1 $ 2.3  
Deferred compensation obligations $ 4.1 2.3  
Notice period for redeeming real estate investment funds 90 days    
U.S. Pension Plans [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets $ 150.5 153.3 $ 179.9
U.S. Pension Plans [Member] | Money Market Investments [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 6.7 1.9  
U.S. Pension Plans [Member] | Fixed Income Securities [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 45.3    
U.S. Pension Plans [Member] | Pooled Equity Funds [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 7.0 34.9  
U.S. Pension Plans [Member] | U.S. Government and Agency Securities [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 57.0    
U.S. Pension Plans [Member] | Other [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 6.8 0.4  
U.S. Pension Plans [Member] | Total [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 122.8 37.2  
U.S. Pension Plans [Member] | Level 1 [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 8.1 34.9  
U.S. Pension Plans [Member] | Level 1 [Member] | Money Market Investments [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 0.0 0.0  
U.S. Pension Plans [Member] | Level 1 [Member] | Fixed Income Securities [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 0.0    
U.S. Pension Plans [Member] | Level 1 [Member] | Pooled Equity Funds [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 7.0 34.9  
U.S. Pension Plans [Member] | Level 1 [Member] | U.S. Government and Agency Securities [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 0.0    
U.S. Pension Plans [Member] | Level 1 [Member] | Other [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 1.1 0.0  
U.S. Pension Plans [Member] | Level 2 [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 114.7 2.3  
U.S. Pension Plans [Member] | Level 2 [Member] | Money Market Investments [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 6.7 1.9  
U.S. Pension Plans [Member] | Level 2 [Member] | Fixed Income Securities [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 45.3    
U.S. Pension Plans [Member] | Level 2 [Member] | Pooled Equity Funds [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 0.0 0.0  
U.S. Pension Plans [Member] | Level 2 [Member] | U.S. Government and Agency Securities [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 57.0    
U.S. Pension Plans [Member] | Level 2 [Member] | Other [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 5.7 0.4  
U.S. Pension Plans [Member] | Level 3 [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets 0.0 0.0  
U.S. Pension Plans [Member] | Net Asset Value [Member]      
Fair Value Measurements [Abstract]      
Fair value of plan assets $ 27.7 $ 116.1