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Stock-Based Compensation, Employee Benefit Plans, and Stock Repurchase Program - Summary of ESPP Activity (Details) - Employee Stock - $ / shares
shares in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Shares issued (in shares) 0.7 0.8 0.7
Weighted-Average Fair Values of Purchase Rights $ 34.07 $ 30.82 $ 33.91
Minimum      
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Exercise Prices for Purchase Rights 102.58 94.96 96.34
Maximum      
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Exercise Prices for Purchase Rights $ 120.94 $ 102.58 $ 111.86