Note 15 Share-Based Compensation Arrangements (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Share-based Compensation [Line Items]
Share-based Payment Arrangement, Noncash Expense	$ 30,844	$ 32,825	$ 37,920
Stock options
Share-based Compensation [Line Items]
Share-based Payment Arrangement, Noncash Expense	1,250	1,779	1,640
Restricted stock units, including performance-based awards
Share-based Compensation [Line Items]
Share-based Payment Arrangement, Noncash Expense	29,594	31,046	36,280
Cost of sales
Share-based Compensation [Line Items]
Share-based Payment Arrangement, Expense	9,757	8,187	8,959
Selling, general & administrative
Share-based Compensation [Line Items]
Share-based Payment Arrangement, Expense	20,807	25,206	28,169
Research & development
Share-based Compensation [Line Items]
Share-based Payment Arrangement, Expense	$ 280	$ (568)	$ 792