Contingencies	6 Months Ended
Mar. 31, 2012
Contingencies [Abstract]
Contingencies	NOTE 13 - CONTINGENCIES We were notified in April 2009 by U.S. Customs and Border Protection ("CBP") of its intention to conduct a customary Focused Assessment of our import activities during fiscal 2008 and of our processes and procedures to comply with U.S. Customs laws and regulations. During September 2010, the Company reported errors relating to import trade activity from July 2004 to the date of Plexus' report. CBP has indicated that on-site fieldwork for the audit was completed as of June 2011, and the Company is currently awaiting final determination of CBP duties and fees. Plexus has agreed that it will implement improved processes and procedures and review these corrective measures with CBP. We recorded an accrual in other current accrued liabilities in the first quarter of fiscal 2010 when the amount became estimable and probable, which was not material to the financial statements. At this time, we do not believe that any deficiencies in processes or controls or unanticipated costs, unpaid duties or penalties associated with this matter will have a material adverse effect on Plexus or the Company's consolidated financial position, results of operations or cash flows.

Contingencies

6 Months Ended

Mar. 31, 2012

NOTE 13 - CONTINGENCIES

We were notified in April 2009 by U.S. Customs and Border Protection ("CBP") of its intention to conduct a customary Focused Assessment of our import activities during fiscal 2008 and of our processes and procedures to comply with U.S. Customs laws and regulations. During September 2010, the Company reported errors relating to import trade activity from July 2004 to the date of Plexus' report. CBP has indicated that on-site fieldwork for the audit was completed as of June 2011, and the Company is currently awaiting final determination of CBP duties and fees. Plexus has agreed that it will implement improved processes and procedures and review these corrective measures with CBP. We recorded an accrual in other current accrued liabilities in the first quarter of fiscal 2010 when the amount became estimable and probable, which was not material to the financial statements. At this time, we do not believe that any deficiencies in processes or controls or unanticipated costs, unpaid duties or penalties associated with this matter will have a material adverse effect on Plexus or the Company's consolidated financial position, results of operations or cash flows.