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Restructuring and Related Cost, Exiting Period

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Restructuring And Related Cost, Number Of Positions Eliminated, Percent Of Workforce

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Retention Cost

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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The expected number of positions to be eliminated as a result of restructuring activities.

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Restructuring (Details) $ in Thousands	3 Months Ended			9 Months Ended				12 Months Ended
Restructuring (Details) $ in Thousands	Sep. 27, 2020 USD ($)	Dec. 29, 2019 employees	Sep. 29, 2019 USD ($)	Sep. 27, 2020 USD ($)	Jun. 30, 2020 employees	Sep. 29, 2019 USD ($)	Sep. 30, 2018 USD ($) employees	Sep. 27, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Non-cash restructuring charges	$ (97)		$ 4,252	$ 2,738		$ 6,626
Restructuring incurred cost				10,200
February 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected as a percentage of global workforce							3.00%
Minimum \| February 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees							150
Non-cash restructuring charges							$ 20,000
Severance costs							11,000
Payments for restructuring							12,000
Real estate lease termination and other associated costs							$ 9,000
Minimum \| Spinoff \| December 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees		145
Reorganization, number of jobs affected as a percentage of global workforce		3.00%
Restructuring and related cost, exiting period		12 months
Non-cash restructuring charges				16,000
Severance costs				8,000
Retention cost				8,000
Payments for restructuring								$ 14,000
Minimum \| Spinoff \| December 2019 Restructuring Plan \| SunPower Technologies
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees		65
Minimum \| Spinoff \| December 2019 Restructuring Plan \| SunPower Energy Services
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees					80
Maximum \| February 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees							250
Non-cash restructuring charges							$ 30,000
Severance costs							16,000
Payments for restructuring							20,000
Real estate lease termination and other associated costs							$ 14,000
Maximum \| Spinoff \| December 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees		160
Restructuring and related cost, exiting period		18 months
Non-cash restructuring charges				22,000
Severance costs				11,000
Retention cost				$ 11,000
Payments for restructuring								$ 19,000
Maximum \| Spinoff \| December 2019 Restructuring Plan \| SunPower Technologies
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees		70
Maximum \| Spinoff \| December 2019 Restructuring Plan \| SunPower Energy Services
Restructuring Cost and Reserve [Line Items]
Reorganization, number of jobs affected \| employees					90