Restructuring and Cost Management Plans Q4 FY17 Restructuring Plan Expected Costs (Details) - Q4 FY17 Restructuring Plan [Member] - USD ($) $ in Thousands		6 Months Ended				12 Months Ended
		Sep. 30, 2017		Jul. 01, 2017		Apr. 01, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		$ 24,661
Restructuring and Related Cost, Incurred Cost		16,475		$ 24,061		$ 7,587
Restructuring and Related Cost, Expected Cost Remaining		600
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		4,165
Restructuring and Related Cost, Incurred Cost		577		4,165		3,588
Restructuring and Related Cost, Expected Cost Remaining		0
Site Closures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		2,090
Restructuring and Related Cost, Incurred Cost		800		1,690		888
Restructuring and Related Cost, Expected Cost Remaining		400
Current Asset Impairments and Other Gross Profit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	[1]	14,947
Restructuring and Related Cost, Incurred Cost		13,278	[2]	14,947	[1]	1,669	[2]
Restructuring and Related Cost, Expected Cost Remaining	[1]	0
Non-Current Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		3,032
Restructuring and Related Cost, Incurred Cost		1,657		3,032		1,376
Restructuring and Related Cost, Expected Cost Remaining		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		427
Restructuring and Related Cost, Incurred Cost		163		$ 227		$ 66
Restructuring and Related Cost, Expected Cost Remaining		$ 200

[1] (1) Current asset impairments include inventory charges recorded in cost of sales.

[2] (1) Asset and facilities costs include inventory charges recorded in cost of sales.