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Fair Value Measurements - Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Mar. 31, 2024
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | $ 379 | $ 362 | [1]
Corporate bonds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 135 | 130 |
U.S. Treasury securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 99 | 95 |
U.S. agency securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 3 | 9 |
Commercial paper |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 73 | 66 |
Foreign government securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 8 | 8 |
Asset-backed securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 46 | 41 |
Certificates of deposit |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 15 | 13 |
(Level 1) |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Total assets at fair value | 948 | 1,221 |
Total liabilities at fair value | 39 | 31 |
(Level 2) |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Total assets at fair value | 360 | 304 |
Total liabilities at fair value | 24 | 20 |
(Level 3) |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Total assets at fair value | 0 | 0 |
Total liabilities at fair value | 0 | 0 |
Short-term investments | (Level 1) | Corporate bonds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 1) | U.S. Treasury securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 104 | 95 |
Short-term investments | (Level 1) | U.S. agency securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 1) | Foreign government securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 1) | Asset-backed securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Asset-backed securities | 0 | 0 |
Short-term investments | (Level 1) | Certificates of deposit |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 2) | Corporate bonds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 136 | 130 |
Short-term investments | (Level 2) | U.S. Treasury securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 2) | U.S. agency securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 3 | 9 |
Short-term investments | (Level 2) | Foreign government securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 8 | 8 |
Short-term investments | (Level 2) | Asset-backed securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Asset-backed securities | 46 | 41 |
Short-term investments | (Level 2) | Certificates of deposit |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 15 | 13 |
Short-term investments | (Level 3) | Corporate bonds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 3) | U.S. Treasury securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 3) | U.S. agency securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 3) | Foreign government securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 3) | Asset-backed securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Asset-backed securities | 0 | 0 |
Short-term investments | (Level 3) | Certificates of deposit |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 1) | Commercial paper |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Short-term investments | (Level 2) | Commercial paper |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 76 | 74 |
Short-term investments | (Level 3) | Commercial paper |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 0 | 0 |
Cash equivalents | (Level 1) | Bank and time deposits |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 357 | 58 |
Cash equivalents | (Level 1) | Money market funds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 448 | 1,038 |
Cash equivalents | (Level 2) | Bank and time deposits |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 0 | 0 |
Cash equivalents | (Level 2) | Money market funds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 0 | 0 |
Cash equivalents | (Level 3) | Bank and time deposits |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 0 | 0 |
Cash equivalents | (Level 3) | Money market funds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 0 | 0 |
Other current assets and other assets | (Level 1) | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Foreign currency derivatives | 0 | 0 |
Other current assets and other assets | (Level 2) | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Foreign currency derivatives | 76 | 29 |
Other current assets and other assets | (Level 3) | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Foreign currency derivatives | 0 | 0 |
Other assets | (Level 1) | Deferred compensation plan assets |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | 39 | 30 |
Other assets | (Level 2) | Deferred compensation plan assets |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | 0 | 0 |
Other assets | (Level 3) | Deferred compensation plan assets |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | 0 | 0 |
Accounts payable, accrued, and other current liabilities and other liabilities | (Level 1) | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, foreign currency derivatives, liabilities | 0 | 0 |
Accounts payable, accrued, and other current liabilities and other liabilities | (Level 2) | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, foreign currency derivatives, liabilities | 24 | 20 |
Accounts payable, accrued, and other current liabilities and other liabilities | (Level 3) | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, foreign currency derivatives, liabilities | 0 | 0 |
Other liabilities | (Level 1) | Deferred Compensation Plan Liabilities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | 39 | 31 |
Other liabilities | (Level 2) | Deferred Compensation Plan Liabilities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | 0 | 0 |
Other liabilities | (Level 3) | Deferred Compensation Plan Liabilities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | 0 | 0 |
Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Total assets at fair value | 1,308 | 1,525 |
Total liabilities at fair value | 63 | 51 |
Fair Value | Short-term investments | Corporate bonds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 136 | 130 |
Fair Value | Short-term investments | U.S. Treasury securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 104 | 95 |
Fair Value | Short-term investments | U.S. agency securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 3 | 9 |
Fair Value | Short-term investments | Foreign government securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 8 | 8 |
Fair Value | Short-term investments | Asset-backed securities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Asset-backed securities | 46 | 41 |
Fair Value | Short-term investments | Certificates of deposit |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 15 | 13 |
Fair Value | Short-term investments | Commercial paper |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Short-term investments | 76 | 74 |
Fair Value | Cash equivalents | Bank and time deposits |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 357 | 58 |
Fair Value | Cash equivalents | Money market funds |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, Cash equivalents | 448 | 1,038 |
Fair Value | Other current assets and other assets | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Foreign currency derivatives | 76 | 29 |
Fair Value | Other assets | Deferred compensation plan assets |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | 39 | 30 |
Fair Value | Accounts payable, accrued, and other current liabilities and other liabilities | Foreign currency derivatives |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, foreign currency derivatives, liabilities | 24 | 20 |
Fair Value | Other liabilities | Deferred Compensation Plan Liabilities |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |
Fair value, deferred compensation plan | $ 39 | $ 31 |
[1] | Derived from audited Consolidated Financial Statements.

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition The fair value as of the balance sheet date of firm holdings in mortgages, mortgage backed securities (investment instruments that represent ownership of an undivided interest in a group of mortgages, where principal and interest from the individual mortgages are used to pay investors' principal and interest on the mortgage backed security) and asset-backed securities that are primarily paid from the cash flows of a discrete pool of receivables or other financial assets (such as credit-card receivables), either fixed or revolving, that by their terms convert into cash within a finite time period. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 940 -SubTopic 320 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479035/940-320-45-2 + Details
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