Note 6 Concentration of Credit Risk (Details)	12 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Financial Instruments and Concentration of Credit Risk [Abstract]
Number of Customers Representing 10% or More of Net Sales	1	1	2
Number of Customers Representing 10% Or More of Gross Accounts Receivable	1	1

Number of single external customers that represent 10% or more of an entity's gross accounts receivable.

No definition available.

Name:	sanm_NumberofCustomersRepresenting10OrMoreofGrossAccountsReceivable
Namespace Prefix:	sanm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant