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Share-Based Compensation (Tables) | 12 Months Ended
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Mar. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of Components of Share-Based Compensation Expense and Related Tax Benefits | The components of share-based compensation expense and related tax benefits were as follows:
| Years Ended March 31,
(In millions) | 2025 |  | 2024 |  | 2023
Restricted stock unit awards (1) | $ | 211 |  |  | $ | 168 |  |  | $ | 149 |
Employee stock purchase plan | 15 |  |  | 14 |  |  | 13 |
Share-based compensation expense | 226 |  |  | 182 |  |  | 162 |
Tax benefit for share-based compensation expense | (85) |  |  | (72) |  |  | (87) |
Share-based compensation expense, net of tax | $ | 141 |  |  | $ | 110 |  |  | $ | 75 |
(1)Includes share-based compensation expense recognized for RSUs and PSUs.
Schedule of Assumptions Used to Estimate Fair Value of PSUs | The weighted-average assumptions used in the Monte Carlo valuations were as follows:
| Years Ended March 31,
| 2025 |  | 2024 |  | 2023
Expected stock price volatility | 21 | % |  | 24 | % |  | 34 | %
Expected dividend yield | 0.5 | % |  | 0.6 | % |  | 0.6 | %
Risk-free interest rate | 4.5 | % |  | 3.9 | % |  | 2.7 | %
Expected life (in years) | 3 |  | 3 |  | 3
Summary of Restricted Stock Unit Award Activity | The following table summarizes activity for RSUs and PSUs during fiscal 2025:
(In millions, except per share data) | Shares |  | Weighted- Average Grant Date Fair Value Per Share
Nonvested, March 31, 2024 | 1.4 |  |  | $ | 307.73 |
Granted | 0.4 |  |  | 559.18 |
Cancelled | (0.1) |  |  | 419.14 |
Vested | (0.8) |  |  | 254.53 |
Nonvested, March 31, 2025 | 0.9 |  |  | $ | 434.89 |
Schedule of Data Related to Restricted Stock Unit Award Activity | The following table provides data related to RSU and PSU award activity:
| Years Ended March 31,
(In millions) | 2025 |  | 2024 |  | 2023
Total fair value of shares vested | $ | 192 |  |  | $ | 143 |  |  | $ | 200 |
Total compensation cost, net of estimated forfeitures, related to nonvested restricted stock unit awards not yet recognized, pre-tax | $ | 191 |  |  | $ | 205 |  |  | $ | 192 |
Weighted-average period in years over which restricted stock unit award cost is expected to be recognized | 1 |  | 2 |  | 2

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