Accounting Policies (Policies)	9 Months Ended
Jun. 27, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting [Text Block]	The accompanying unaudited condensed consolidated financial statements of Sanmina Corporation (the “Company”) have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been omitted pursuant to those rules or regulations. The interim condensed consolidated financial statements are unaudited, but reflect all adjustments, consisting primarily of normal recurring adjustments, that are, in the opinion of management, necessary to a fair statement of the results for the interim periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended September 28, 2019, included in the Company's 2019 Annual Report on Form 10-K.
Use of Estimates, Policy [Policy Text Block]	The preparation of financial statements requires management to make estimates and assumptions that affect the amounts reported in the unaudited condensed consolidated financial statements and accompanying notes. Due to the COVID-19 global pandemic, the global economy and financial markets have been disrupted and there continues to be a significant amount of uncertainty about the length and severity of the consequences caused by the pandemic. The Company has considered information available to it as of the date of issuance of these financial statements and, other than two customer bankruptcies in the third quarter of 2020, the impact of which was immaterial, and the impairments described in Note 3, the Company is not aware of any specific events or circumstances that would require an update to its estimates or judgments, or a revision to the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information becomes available. Actual results could differ materially from these estimates. Results of operations for the third quarter of 2020 are not necessarily indicative of the results that may be expected for other interim periods or for the full fiscal year.
Fiscal Period, Policy [Policy Text Block]	The Company operates on a 52 or 53 week year ending on the Saturday nearest September 30. Fiscal 2019 was a 52-week year and fiscal 2020 will be a 53-week year, with the extra week occurring during the fourth quarter. All references to years relate to fiscal years unless otherwise noted.
New Accounting Pronouncements, Policy [Text Block]	Recent Accounting Pronouncements Adopted In December 2019, the FASB issued ASU 2019-12, "Simplifying the Accounting for Income Taxes (Topic 740)", which is intended to simplify various aspects related to accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and which also clarifies and amends existing guidance to improve consistent application. The Company adopted this ASU in the second quarter of 2020. The impact of adoption was not material. In February 2018, the FASB issued ASU 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income", which allows companies to reclassify stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act (H.R. 1) from accumulated other comprehensive income to retained earnings. The Company adopted this ASU at the beginning of fiscal 2020. There was no impact upon adoption. In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements for Accounting For Hedging Activities", simplifying hedge accounting guidance and improving the financial reporting of hedging relationships by allowing an entity to better align its risk management activities and financial reporting for hedging relationships through changes to both designation and measurement for qualifying hedging relationships and the presentation of hedge results. This standard eliminates the requirement to separately measure and report hedge ineffectiveness, resulting in full recognition of the change in fair value that impacts earnings in the same income statement line item that is used to present the earnings effect of the hedged item. In addition, the guidance allows more flexibility in the requirements to qualify for and maintain hedge accounting. The Company adopted this ASU at the beginning of fiscal 2020. The impact of adoption was not material. In February 2016, the FASB issued ASU 2016-02, "Leases: Amendments to the FASB Accounting Standards Codification (Topic 842)". This ASU requires the Company to recognize on the balance sheet the assets and liabilities for the rights and obligations created by leases with terms of more than twelve months. This ASU also requires disclosures enabling the users of financial statements to understand the amount, timing and uncertainty of cash flows arising from leases. In addition, the FASB provided a practical expedient transition method that allows entities to initially apply the requirements by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, as opposed to applying the requirements retrospectively and providing comparative prior period financial statements. The Company adopted the new standard on September 29, 2019, the first day of fiscal 2020, and applied the above practical expedient transition method. The Company elected certain other transition options which, among other things, allowed the Company to carry forward its prior conclusions about lease identification and classification. Upon adoption of the new standard, the Company recognized approximately $65 million of right-of-use ("ROU") assets and lease liabilities. Adoption of the new standard did not have a material impact on the Company's consolidated statements of income or consolidated statements of cash flows. Refer to Note 5 for additional information and disclosures related to the adoption of ASC 842. Recent Accounting Pronouncements Not Yet Adopted In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848)", which provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform. The amendments are effective for all entities as of March 12, 2020 through December 31, 2022. The Company has not yet applied any of the expedients and exceptions and is currently evaluating the impact of the provisions of ASU 2020-04. In August 2018, the FASB issued ASU 2018-15, "Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." The new guidance aligns the requirements for capitalizing implementation costs incurred in a cloud-based hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). This ASU is effective for the Company at the beginning of fiscal 2021, including interim periods within that reporting period. In June 2016, the FASB issued ASU 2016-13 "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which replaces the existing incurred loss impairment methodology with an expected credit loss methodology and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This new standard is effective for the Company at the beginning of fiscal 2021, including interim periods within that reporting period. The Company does not expect the impact of adoption to be significant.

Accounting Policies (Policies)

9 Months Ended

Jun. 27, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying unaudited condensed consolidated financial statements of Sanmina Corporation (the “Company”) have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been omitted pursuant to those rules or regulations. The interim condensed consolidated financial statements are unaudited, but reflect all adjustments, consisting primarily of normal recurring adjustments, that are, in the opinion of management, necessary to a fair statement of the results for the interim periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended September 28, 2019, included in the Company's 2019 Annual Report on Form 10-K.

Use of Estimates, Policy [Policy Text Block]

The preparation of financial statements requires management to make estimates and assumptions that affect the amounts reported in the unaudited condensed consolidated financial statements and accompanying notes. Due to the COVID-19 global pandemic, the global economy and financial markets have been disrupted and there continues to be a significant amount of uncertainty about the length and severity of the consequences caused by the pandemic. The Company has considered information available to it as of the date of issuance of these financial statements and, other than two customer bankruptcies in the third quarter of 2020, the impact of which was immaterial, and the impairments described in Note 3, the Company is not aware of any specific events or circumstances that would require an update to its estimates or judgments, or a revision to the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information becomes available. Actual results could differ materially from these estimates.

Results of operations for the third quarter of 2020 are not necessarily indicative of the results that may be expected for other interim periods or for the full fiscal year.

Fiscal Period, Policy [Policy Text Block]

The Company operates on a 52 or 53 week year ending on the Saturday nearest September 30. Fiscal 2019 was a 52-week year and fiscal 2020 will be a 53-week year, with the extra week occurring during the fourth quarter. All references to years relate to fiscal years unless otherwise noted.

New Accounting Pronouncements, Policy [Text Block]

Recent Accounting Pronouncements Adopted

In December 2019, the FASB issued ASU 2019-12, "Simplifying the Accounting for Income Taxes (Topic 740)", which is intended to simplify various aspects related to accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and which also clarifies and amends existing guidance to improve consistent application. The Company adopted this ASU in the second quarter of 2020. The impact of adoption was not material.

In February 2018, the FASB issued ASU 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income", which allows companies to reclassify stranded tax effects resulting from the U.S. Tax Cuts and Jobs Act (H.R. 1) from accumulated other comprehensive income to retained earnings. The Company adopted this ASU at the beginning of fiscal 2020. There was no impact upon adoption.

In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements for Accounting For Hedging Activities", simplifying hedge accounting guidance and improving the financial reporting of hedging relationships by allowing an entity to better align its risk management activities and financial reporting for hedging relationships through changes to both designation and measurement for qualifying hedging relationships and the presentation of hedge results. This standard eliminates the requirement to separately measure and report hedge ineffectiveness, resulting in full recognition of the change in fair value that impacts earnings in the same income statement line item that is used to present the earnings effect of the hedged item. In addition, the guidance allows more flexibility in the requirements to qualify for and maintain hedge accounting. The Company adopted this ASU at the beginning of fiscal 2020. The impact of adoption was not material.

In February 2016, the FASB issued ASU 2016-02, "Leases: Amendments to the FASB Accounting Standards Codification (Topic 842)". This ASU requires the Company to recognize on the balance sheet the assets and liabilities for the

rights and obligations created by leases with terms of more than twelve months. This ASU also requires disclosures enabling the users of financial statements to understand the amount, timing and uncertainty of cash flows arising from leases. In addition, the FASB provided a practical expedient transition method that allows entities to initially apply the requirements by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, as opposed to applying the requirements retrospectively and providing comparative prior period financial statements. The Company adopted the new standard on September 29, 2019, the first day of fiscal 2020, and applied the above practical expedient transition method. The Company elected certain other transition options which, among other things, allowed the Company to carry forward its prior conclusions about lease identification and classification.

Upon adoption of the new standard, the Company recognized approximately $65 million of right-of-use ("ROU") assets and lease liabilities. Adoption of the new standard did not have a material impact on the Company's consolidated statements of income or consolidated statements of cash flows.

Refer to Note 5 for additional information and disclosures related to the adoption of ASC 842.

Recent Accounting Pronouncements Not Yet Adopted

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848)", which provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform. The amendments are effective for all entities as of March 12, 2020 through December 31, 2022. The Company has not yet applied any of the expedients and exceptions and is currently evaluating the impact of the provisions of ASU 2020-04.

In August 2018, the FASB issued ASU 2018-15, "Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." The new guidance aligns the requirements for capitalizing implementation costs incurred in a cloud-based hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). This ASU is effective for the Company at the beginning of fiscal 2021, including interim periods within that reporting period.

In June 2016, the FASB issued ASU 2016-13 "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which replaces the existing incurred loss impairment methodology with an expected credit loss methodology and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This new standard is effective for the Company at the beginning of fiscal 2021, including interim periods within that reporting period. The Company does not expect the impact of adoption to be significant.