Related Parties and Related Commitments and Contingencies - Schedule of Variable Interest Entity Maximum Loss Exposure (Details) - Oct. 02, 2026 - Related Party $ in Millions, ¥ in Billions	USD ($)	JPY (¥)
Guarantor Obligations [Line Items]
Maximum estimable loss exposure	$ 2,944
Operating lease guarantees	838	¥ 132
Inventory and prepayments	1,279
Balance Sheet Location [Axis]: us-gaap:EquitySecuritiesFVNINoncurrent
Guarantor Obligations [Line Items]
Maximum estimable loss exposure	100
Balance Sheet Location [Axis]: sndk:NotesReceivableAndInvestmentsInRelatedPartiesNoncurrent
Guarantor Obligations [Line Items]
Maximum estimable loss exposure	$ 727

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

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- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

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