XML 55 R35.htm IDEA: XBRL DOCUMENT
v3.25.1

Geographic Information and Concentrations of Risk - Schedule of f Long Lived Assets (Details) - USD ($) $ in Millions | Dec. 27, 2024 | Jun. 28, 2024 | Jun. 30, 2023
--- | --- | --- | ---
Disaggregation Of Long Lived Assets [Line Items] |  |  |
Property, plant and equipment, Net | $ 579 | $ 791 |
The Flash Business of Western Digital Corporation [Member] |  |  |
Disaggregation Of Long Lived Assets [Line Items] |  |  |
Property, plant and equipment, Net |  | 791 | $ 933
The Flash Business of Western Digital Corporation [Member] | UNITED STATES |  |  |
Disaggregation Of Long Lived Assets [Line Items] |  |  |
Property, plant and equipment, Net |  | 77 | 154
The Flash Business of Western Digital Corporation [Member] | CHINA |  |  |
Disaggregation Of Long Lived Assets [Line Items] |  |  |
Property, plant and equipment, Net |  | 249 | 298
The Flash Business of Western Digital Corporation [Member] | MALAYSIA |  |  |
Disaggregation Of Long Lived Assets [Line Items] |  |  |
Property, plant and equipment, Net |  | 388 | 390
The Flash Business of Western Digital Corporation [Member] | Asia Pacific [Member] |  |  |
Disaggregation Of Long Lived Assets [Line Items] |  |  |
Property, plant and equipment, Net |  | 4 | 4
The Flash Business of Western Digital Corporation [Member] | EMEA [Member] |  |  |
Disaggregation Of Long Lived Assets [Line Items] |  |  |
Property, plant and equipment, Net |  | $ 73 | $ 87

X
- References No definition available. + Details
Name: | sndk_DisaggregationOfLongLivedAssetsLineItems
Namespace Prefix: | sndk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 360 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478451/942-360-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=sndk_TheFlashBusinessOfWesternDigitalCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_MY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_AsiaPacificMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=us-gaap_EMEAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |