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Stock-Based Compensation And Employee Benefit Plans - Summary of Stock-Based Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 584 $ 548 $ 528
Cost of revenue      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 8 7 6
Research and development      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 418 367 356
Marketing and sales      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense 52 59 54
General and administrative      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 106 $ 115 $ 112