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Income Tax Expense - Schedule of Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 27, 2024 | Jun. 28, 2024 | Jun. 30, 2023 | Jul. 01, 2022
Income Tax Expense [Line Items] |  |  |  |
Unrecognized tax benefit, beginning balance | $ 47 |  |  |
Gross increases related to current year tax positions | 3 |  |  |
Gross increases related to prior year tax positions | 17 |  |  |
Gross decreases related to prior year tax positions | (7) |  |  |
Unrecognized tax benefit, ending balance | 60 | $ 47 |  |
The Flash Business of Western Digital Corporation [Member] |  |  |  |
Income Tax Expense [Line Items] |  |  |  |
Unrecognized tax benefit, beginning balance | $ 47 | 25 | $ 17 | $ 11
Gross increases related to current year tax positions |  | 15 | 10 | 7
Gross increases related to prior year tax positions |  | 10 | 1 | 0
Gross decreases related to prior year tax positions |  | (3) | (3) | (1)
Settlements |  | 0 | 0 | 0
Unrecognized tax benefit, ending balance |  | $ 47 | $ 25 | $ 17

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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 217 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-217 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A + Details
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