Acquisition	12 Months Ended
Sep. 28, 2019
Acquisition [Abstract]
Acquisition	Acquisition On July 27, 2018, the Company purchased the assets of one of the business lines of Cascade Controls, Inc. ("Cascade"), a new product introduction company in Portland, Oregon, for $12.4 million in cash, subject to certain customary post-closing adjustments. In the three months ended December 29, 2018, the Company received a $1.2 million purchase price adjustment as a result of a post-closing adjustment. Plexus acquired substantially all of the inventory, equipment and other assets of the business line, hired a majority of its employees and sub-leased one of Cascade's facilities. This transaction has been accounted for as a business combination. The acquisition resulted in a $12.4 million cash outflow in fiscal 2018 and a $1.2 million cash inflow in fiscal 2019 included in "Business acquisition" in the accompanying Consolidated Statements of Cash Flows. Additionally, $8.2 million and $6.9 million of intangible assets related to customer relationships is included in non-current "Other" assets in the accompanying Consolidated Balance Sheet for fiscal 2018 and 2019, respectively. The intangible assets are amortized on a straight-line basis and result in amortization expense for fiscal 2019, 2020, 2021, 2022 and 2023 of approximately $1.2 million per year. There were no other material impacts to the Company's Consolidated Financial Statements as a result of the acquisition.

Acquisition

12 Months Ended

Sep. 28, 2019

On July 27, 2018, the Company purchased the assets of one of the business lines of Cascade Controls, Inc. ("Cascade"), a new product introduction company in Portland, Oregon, for $12.4 million in cash, subject to certain customary post-closing adjustments. In the three months ended December 29, 2018, the Company received a $1.2 million purchase price adjustment as a result of a post-closing adjustment. Plexus acquired substantially all of the inventory, equipment and other assets of the business line, hired a majority of its employees and sub-leased one of Cascade's facilities. This transaction has been accounted for as a business combination.

The acquisition resulted in a $12.4 million cash outflow in fiscal 2018 and a $1.2 million cash inflow in fiscal 2019 included in "Business acquisition" in the accompanying Consolidated Statements of Cash Flows. Additionally, $8.2 million and $6.9 million of intangible assets related to customer relationships is included in non-current "Other" assets in the accompanying Consolidated Balance Sheet for fiscal 2018 and 2019, respectively. The intangible assets are amortized on a straight-line basis and result in amortization expense for fiscal 2019, 2020, 2021, 2022 and 2023 of approximately $1.2 million per year. There were no other material impacts to the Company's Consolidated Financial Statements as a result of the acquisition.