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Employee Termination and Other Charges - Schedule of Net Charges (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
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other | $ 5 | $ (46) |  |  |
The Flash Business of Western Digital Corporation [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other |  |  | $ (40) | $ 69 | $ 16
Employee termination benefits |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other | 2 | 14 |  |  |
Employee termination benefits | The Flash Business of Western Digital Corporation [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other |  |  | 15 | 68 | 22
Contract termination and other |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other | 3 | 0 |  |  |
Contract termination and other | The Flash Business of Western Digital Corporation [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other |  |  | 5 | 1 | (6)
Gain on sale-leaseback of facility |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other | $ 0 | $ (60) |  |  |
Gain on sale-leaseback of facility | The Flash Business of Western Digital Corporation [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Employee termination, asset impairment and other |  |  | $ (60) | $ 0 | $ 0

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