Fair Value Measurements (Fair Value of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Mar. 31, 2022 |
Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Total assets at fair value | $ 1,413 | $ 740 |
Total liabilities at fair value | 89 | 36 |
Short-term investments | 343 | 330 |
Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Total assets at fair value | 1,115 | 437 |
Total liabilities at fair value | 24 | 22 |
Significant Other Observable Inputs (Level 2) | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Total assets at fair value | 298 | 303 |
Total liabilities at fair value | 65 | 14 |
Fair Value, Inputs, Level 3 | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Total assets at fair value | 0 | 0 |
Total liabilities at fair value | 0 | 0 |
Cash equivalents | Bank and time deposits | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 56 | 55 |
Cash equivalents | Money market funds | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 956 | 257 |
Cash equivalents | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Bank and time deposits | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 56 | 55 |
Cash equivalents | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Money market funds | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 956 | 257 |
Cash equivalents | Significant Other Observable Inputs (Level 2) | Bank and time deposits | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 0 | 0 |
Cash equivalents | Significant Other Observable Inputs (Level 2) | Money market funds | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 0 | 0 |
Cash equivalents | Fair Value, Inputs, Level 3 | Bank and time deposits | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 0 | 0 |
Cash equivalents | Fair Value, Inputs, Level 3 | Money market funds | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, cash equivalents | 0 | 0 |
Short-term investments and cash equivalents | Corporate bonds | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 113 | 116 |
Short-term investments and cash equivalents | U.S. Treasury securities | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 80 | 104 |
Short-term investments and cash equivalents | Commercial paper | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 66 | 51 |
Short-term investments and cash equivalents | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Corporate bonds | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | 0 |
Short-term investments and cash equivalents | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | U.S. Treasury securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 80 | 104 |
Short-term investments and cash equivalents | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Commercial paper | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | 0 |
Short-term investments and cash equivalents | Significant Other Observable Inputs (Level 2) | Corporate bonds | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 113 | 116 |
Short-term investments and cash equivalents | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | 0 |
Short-term investments and cash equivalents | Significant Other Observable Inputs (Level 2) | Commercial paper | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 66 | 51 |
Short-term investments and cash equivalents | Fair Value, Inputs, Level 3 | Corporate bonds | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | 0 |
Short-term investments and cash equivalents | Fair Value, Inputs, Level 3 | U.S. Treasury securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | 0 |
Short-term investments and cash equivalents | Fair Value, Inputs, Level 3 | Commercial paper | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | 0 |
Short-term investments | U.S. agency securities | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 28 | |
Short-term investments | Foreign government securities | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 11 | 17 |
Short-term investments | Asset-backed securities | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Asset-backed securities | 37 | 38 |
Short-term investments | Certificates of deposit | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 14 | 18 |
Short-term investments | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | | 0 |
Asset-backed securities | | 0 |
Short-term investments | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | U.S. agency securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | |
Short-term investments | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Foreign government securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | |
Short-term investments | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Asset-backed securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Asset-backed securities | 0 | |
Short-term investments | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Certificates of deposit | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | |
Short-term investments | Significant Other Observable Inputs (Level 2) | U.S. agency securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 28 | |
Short-term investments | Significant Other Observable Inputs (Level 2) | Foreign government securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 11 | 17 |
Short-term investments | Significant Other Observable Inputs (Level 2) | Asset-backed securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Asset-backed securities | 37 | 38 |
Short-term investments | Significant Other Observable Inputs (Level 2) | Certificates of deposit | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 14 | 18 |
Short-term investments | Fair Value, Inputs, Level 3 | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | | 0 |
Asset-backed securities | | 0 |
Short-term investments | Fair Value, Inputs, Level 3 | U.S. agency securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | |
Short-term investments | Fair Value, Inputs, Level 3 | Foreign government securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | |
Short-term investments | Fair Value, Inputs, Level 3 | Asset-backed securities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Asset-backed securities | 0 | |
Short-term investments | Fair Value, Inputs, Level 3 | Certificates of deposit | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Short-term investments | 0 | |
Other current assets and other assets | Foreign currency derivatives | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives | 29 | 63 |
Other current assets and other assets | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives | | 0 |
Other current assets and other assets | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Foreign currency derivatives | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives | 0 | |
Other current assets and other assets | Significant Other Observable Inputs (Level 2) | Foreign currency derivatives | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives | 29 | 63 |
Other current assets and other assets | Fair Value, Inputs, Level 3 | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives | | 0 |
Other current assets and other assets | Fair Value, Inputs, Level 3 | Foreign currency derivatives | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives | 0 | |
Other assets | Deferred compensation plan assets | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | 23 | 21 |
Other assets | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Deferred compensation plan assets | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | 23 | 21 |
Other assets | Significant Other Observable Inputs (Level 2) | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | | 0 |
Other assets | Significant Other Observable Inputs (Level 2) | Deferred compensation plan assets | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | 0 | |
Other assets | Fair Value, Inputs, Level 3 | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | | 0 |
Other assets | Fair Value, Inputs, Level 3 | Deferred compensation plan assets | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | 0 | |
Accrued and other current liabilities and other liabilities | Foreign currency derivatives | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives, liabilities | 65 | 14 |
Accrued and other current liabilities and other liabilities | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives, liabilities | | 0 |
Accrued and other current liabilities and other liabilities | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Foreign currency derivatives | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives, liabilities | 0 | |
Accrued and other current liabilities and other liabilities | Significant Other Observable Inputs (Level 2) | Foreign currency derivatives | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives, liabilities | 65 | 14 |
Accrued and other current liabilities and other liabilities | Fair Value, Inputs, Level 3 | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives, liabilities | | 0 |
Accrued and other current liabilities and other liabilities | Fair Value, Inputs, Level 3 | Foreign currency derivatives | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, foreign currency derivatives, liabilities | 0 | |
Other liabilities | Deferred Compensation Plan Liabilities | Fair Value | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | 24 | 22 |
Other liabilities | Quoted Prices In Active Markets For Identical Financial Instruments (Level 1) | Deferred Compensation Plan Liabilities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | 24 | 22 |
Other liabilities | Significant Other Observable Inputs (Level 2) | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | | 0 |
Other liabilities | Significant Other Observable Inputs (Level 2) | Deferred Compensation Plan Liabilities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | 0 | |
Other liabilities | Fair Value, Inputs, Level 3 | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | | $ 0 |
Other liabilities | Fair Value, Inputs, Level 3 | Deferred Compensation Plan Liabilities | | |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | | |
Fair value, deferred compensation plan assets and liabilities | $ 0 | |