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Share-based Compensation - Schedule of Share-Based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Share-based compensation cost (credit) | $ 241 | $ 182
Less: income tax effect | 46 | 12
Net share-based compensation cost | 195 | 170
Cost of sales |  |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Share-based compensation cost (credit) | 7 | 6
Research and development |  |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Share-based compensation cost (credit) | 174 | 129
Selling, general and administrative expenses |  |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Share-based compensation cost (credit) | $ 60 | $ 47

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