Note 7 Restructuring (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018 USD ($)	Apr. 01, 2017 USD ($)	Mar. 31, 2018 USD ($)	Apr. 01, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Expected cost prior to reimbursement	$ 35,000		$ 35,000
Restructuring Expense (Recovery) prior to reimbursement	1,465		24,766
Expected Cost	25,000		25,000
Restructuring Expense (Recovery), net	(8,591)	$ 3,301	14,951	$ 4,029
Q1 FY18 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Current	12,000		12,000
Restructuring Reserve, Noncurrent	9,000		$ 9,000
Initiation Date			Jan. 12, 2018
Completion Date			Dec. 31, 2019
Expected Number of Positions Eliminated			2,900
Severance Reimbursement	(10,000)		$ (10,000)
Expected Cost	25,000		25,000
Restructuring Expense (Recovery), net	(8,535)		14,766
Q1 FY18 Plan [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Expected Cost	27,700		27,700
Restructuring Charges	1,191		24,492
Q1 FY18 Plan [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Expected Cost	7,300		7,300
Restructuring Charges	274		274
Q1 FY18 Plan [Member] | IMS
Restructuring Cost and Reserve [Line Items]
Expected Cost	14,600		14,600
Restructuring Expense (Recovery), net			10,400
Q1 FY18 Plan [Member] | CPS [Member]
Restructuring Cost and Reserve [Line Items]
Expected Cost	10,400		10,400
Restructuring Expense (Recovery), net			4,400
Prior to Q1 FY18 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Expected Cost	0		0
Restructuring Expense (Recovery), net	$ (56)		$ 185