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Employee Benefit Plans (Actuarial Assumptions for the Pension Plans) (Details)
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Minimum      
Benefit Obligations:      
Discount rate (as a percent) 1.50% 1.00%  
Estimated rate of compensation increase (as a percent) 2.25% 2.25%  
Cash balance interest credit rate (as a percent) 0.50% 0.00%  
Net Periodic Costs:      
Discount rate (as a percent) 1.50% 0.50% 0.25%
Estimated rate of compensation increase (as a percent) 2.25% 2.00% 2.00%
Expected average rate of return on plan assets (as a percent) 0.50% 1.00% 1.00%
Cash balance interest credit rate (as a percent) 0.50% 0.00% 0.00%
Maximum      
Benefit Obligations:      
Discount rate (as a percent) 7.00% 7.25%  
Estimated rate of compensation increase (as a percent) 10.00% 10.00%  
Cash balance interest credit rate (as a percent) 1.75% 1.75%  
Net Periodic Costs:      
Discount rate (as a percent) 7.25% 6.75% 6.00%
Estimated rate of compensation increase (as a percent) 10.00% 10.00% 10.00%
Expected average rate of return on plan assets (as a percent) 4.50% 2.50% 2.25%
Cash balance interest credit rate (as a percent) 1.75% 1.75% 1.75%