| **Goodwill And Acquisition-Related Intangibles, Net - Schedule Of Future Amortization Of Acquisition-Related Intangibles (Details) - USD ($) $ in Millions** | Dec. 31, 2024 | Mar. 31, 2024 |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Finite-Lived Intangible Assets**                                                                                                                           |          |          |
| 2025 (remaining three months)                                                                                                                                | $ 27          |          |
| 2026                                                                                                                                                         | 102           |          |
| 2027                                                                                                                                                         | 83            |          |
| 2028                                                                                                                                                         | 80            |          |
| 2029                                                                                                                                                         | 28            |          |
| Acquisition- Related Intangibles, Net                                                                                                                   | 320           | $ 400         |
| Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year through after Year Five                                                       |          |          |
| **Finite-Lived Intangible Assets**                                                                                                                           |          |          |
| Acquisition- Related Intangibles, Net                                                                                                                   | $ 320         |          |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
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| - Definition
Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in remainder of current fiscal year.
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| - Definition
Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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| - Definition
Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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| - Definition
Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
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| - Definition
Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.
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