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Property and Equipment, Net - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2024
Property, Plant and Equipment [Line Items] |  |  |
Depreciation and amortization expense related to property and equipment | $ 38 | $ 41 | $ 41
Reduction to gross cost and accumulated depreciation for zero net book value assets | 32 | 90 |
Leasehold improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Amortization | $ 30 | $ 29 | $ 30

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- Definition Amount of decrease in accumulated depreciation, depletion and amortization as a result of sale or disposal of property, plant and equipment. + References No definition available. + Details
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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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