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Employee Retirement Plans (Weighted Average Assumptions) (Details)
12 Months Ended
Apr. 30, 2022
Dec. 31, 2020
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items]          
Discount rate     4.47%    
Expected return on plan assets, net of administrative fees     2.75%    
Qualified plan          
Defined Benefit Plan Disclosure [Line Items]          
Discount rate 3.98% 2.51%      
Expected return on plan assets, net of administrative fees 2.75% 2.75% 2.75% 2.25% 5.00%
Minimum          
Defined Benefit Plan Disclosure [Line Items]          
Discount rate       3.26%  
Minimum | Qualified plan          
Defined Benefit Plan Disclosure [Line Items]          
Discount rate     3.48% 2.58% 3.37%
Maximum          
Defined Benefit Plan Disclosure [Line Items]          
Discount rate       3.48%  
Maximum | Qualified plan          
Defined Benefit Plan Disclosure [Line Items]          
Discount rate     3.26% 2.95% 3.55%