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v3.25.1

Income Tax Expense - Reconciliation of the U.S. federal statutory rate (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 27, 2024 | Dec. 29, 2023 | Jun. 28, 2024 | Jun. 30, 2023 | Jul. 01, 2022
Income Tax Expense [Line Items] |  |  |  |  |
Effective income tax rate | 28.00% | (9.00%) |  |  |
The Flash Business of Western Digital Corporation [Member] |  |  |  |  |
Income Tax Expense [Line Items] |  |  |  |  |
Tax at federal statutory tax rate |  |  | $ 21.0 | $ 21.0 | $ 21.0
Tax rate differential on international incomes |  |  | (42.3) | (28.7) | 0.4
Foreign withholding tax |  |  | (10.8) | (1.7) | 2.9
Change in valuation allowance |  |  | (2.2) | (0.4) | 1.4
Tax effect of U.S foreign income inclusion |  |  | (1.2) | (0.4) | 5.8
Tax effect of U.S foreign derived intangible income |  |  | 1.9 | 3.1 | (7.6)
Tax effect of permanent differences |  |  | (1.4) | (0.5) | (0.1)
Tax effect of goodwill impairment |  |  | 0.0 | (7.0) | 0.0
Tax effect of intangible assets |  |  | 0.9 | 4.3 | (6.5)
Tax rate change |  |  | 0.6 | 0.1 | 0.0
Unremitted earnings of certain non-U.S. entities |  |  | 2.2 | 0.4 | 0.0
Change in uncertain tax positions |  |  | (11.4) | 0.6 | 0.5
Return to provision adjustment |  |  | (1.3) | (0.2) | (0.5)
Foreign Income Tax Credits |  |  | 5.1 | 1.4 | (2.4)
R&D tax credits |  |  | 2.7 | 1.0 | (2.1)
Tax effect of share-based compensation |  |  | (1.1) | (0.5) | 0.9
Federal audit settlements |  |  | 3.3 | 0.0 | 0.0
Other |  |  | $ 0.4 | $ 0.5 | $ 0.1
Effective income tax rate |  |  | (33.60%) | (7.00%) | 13.80%

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- Definition Amount of reported income tax expense (benefit) from difference to expected income tax expense (benefit) computed by applying statutory federal (national) income tax rate to pretax income (loss) from continuing operation, attributable to cross-border tax law. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A + Details
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