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Derivative Financial Instruments (Tables) | 6 Months Ended
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Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions | Total gross notional amounts and fair values for currency derivatives with cash flow hedge accounting designation are as follows (in millions):
| As of September 30, 2025 |  | As of March 31, 2025
| Notional Amount |  | Fair Value |  | Notional Amount |  | Fair Value
|  | Asset |  | Liability |  |  | Asset |  | Liability
Forward contracts to purchase | $ | 355 |  |  | $ | 7 |  |  | $ | 2 |  |  | $ | 463 |  |  | $ | 4 |  |  | $ | 7 |
Forward contracts to sell | $ | 2,063 |  |  | $ | 3 |  |  | $ | 83 |  |  | $ | 1,970 |  |  | $ | 20 |  |  | $ | 16 |
Total gross notional amounts and fair values for currency derivatives that are not designated as hedging instruments are accounted for as follows (in millions):
| As of September 30, 2025 |  | As of March 31, 2025
| Notional Amount |  | Fair Value |  | Notional Amount |  | Fair Value
|  | Asset |  | Liability |  |  | Asset |  | Liability
Forward contracts to purchase | $ | 744 |  |  | $ | — |  |  | $ | 3 |  |  | $ | 511 |  |  | $ | 1 |  |  | $ | 2 |
Forward contracts to sell | $ | 770 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 582 |  |  | $ | 3 |  |  | $ | 1 |
Derivative Instruments, Gain (Loss) | The effects of cash flow hedge accounting in our Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2025 and 2024 are as follows (in millions):
| Three Months Ended September 30, |  | Six Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| Net revenue |  | Research and development |  | Net revenue |  | Research and development |  | Net revenue |  | Research and development |  | Net revenue |  | Research and development
Total amounts presented in our Condensed Consolidated Statements of Operations in which the effects of cash flow hedges are recorded | $ | 1,839 |  |  | $ | 686 |  |  | $ | 2,025 |  |  | $ | 648 |  |  | $ | 3,510 |  |  | $ | 1,392 |  |  | $ | 3,685 |  |  | $ | 1,277 |
Gains (losses) on foreign currency forward contracts designated as cash flow hedges | $ | (10) |  |  | $ | 2 |  |  | $ | (2) |  |  | $ | (1) |  |  | $ | (7) |  |  | $ | 2 |  |  | $ | 5 |  |  | $ | (3) |
The effect of foreign currency forward contracts not designated as hedging instruments in our Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2025 and 2024 was as follows (in millions):
| Three Months Ended September 30, |  | Six Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| Interest and other income (expense), net
Total amounts presented in our Condensed Consolidated Statements of Operations in which the effects of balance sheet hedges are recorded | $ | (3) |  |  | $ | 15 |  |  | $ | (1) |  |  | $ | 45 |
Gains (losses) on foreign currency forward contracts not designated as hedging instruments | $ | (3) |  |  | $ | (3) |  |  | $ | (19) |  |  | $ | 3 |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
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