Restructuring and Cost Management Plans Q4 FY17 Restructuring Plan Expected Costs (Details) - Q4 FY17 Restructuring Plan [Member] - USD ($) $ in Thousands		12 Months Ended				15 Months Ended
		Mar. 31, 2018		Apr. 01, 2017		Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		$ 24,660				$ 24,660
Restructuring and Related Cost, Incurred Cost		(17,074)		$ (7,587)		(24,660)
Restructuring and Related Cost, Expected Cost Remaining		0				0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		4,925				4,925
Restructuring and Related Cost, Incurred Cost		(1,337)		(3,588)		(4,925)
Restructuring and Related Cost, Expected Cost Remaining		0				0
Site Closures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		1,516				1,516
Restructuring and Related Cost, Incurred Cost		(627)		(888)		(1,516)
Restructuring and Related Cost, Expected Cost Remaining		0				0
Current Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	[1]	14,947				14,947
Restructuring and Related Cost, Incurred Cost		(13,278)	[2]	(1,669)	[2]	(14,947)	[1]
Restructuring and Related Cost, Expected Cost Remaining	[1]	0				0
Non-Current Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		3,033				3,033
Restructuring and Related Cost, Incurred Cost		(1,657)		(1,376)		(3,033)
Restructuring and Related Cost, Expected Cost Remaining		0				0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost		239				239
Restructuring and Related Cost, Incurred Cost		(175)		$ (66)		(239)
Restructuring and Related Cost, Expected Cost Remaining		$ 0				$ 0

[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.