| **Balance Sheet Details - Deferred Net Revenue (Details) - USD ($) $ in Millions** | Jun. 30, 2024 | Mar. 31, 2024 |
|------------------------------------------------------------------------------------|---------------|---------------|
| **Deferred Revenue Arrangement [Line Items]**                                      |          |          |  |
| Deferred revenue, current                                                          | $ 1,412       | $ 1,814       | [1] |
| Deferred net revenue (online-enabled games)                                        |          |          |  |
| **Deferred Revenue Arrangement [Line Items]**                                      |          |          |  |
| Deferred revenue, current                                                          | 1,412         | 1,814         |  |
| Deferred net revenue (other)                                                       |          |          |  |
| **Deferred Revenue Arrangement [Line Items]**                                      |          |          |  |
| Deferred revenue, current                                                          | 54            | 59            |  |
| Deferred net revenue (noncurrent)                                                  |          |          |  |
| **Deferred Revenue Arrangement [Line Items]**                                      |          |          |  |
| Deferred revenue, noncurrent                                                       | 78            | 85            |  |
| Total deferred net revenue                                                         |          |          |  |
| **Deferred Revenue Arrangement [Line Items]**                                      |          |          |  |
| Deferred revenue                                                                   | $ 1,544       | $ 1,958       |  |
|                                                                                    |
| [1]Derived from audited Consolidated Financial Statements.                         |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.
+ References
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(26)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.
+ References
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as noncurrent.
+ References
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(26)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
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| X                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------|
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