Restructuring and Cost Management Plans Q4 FY17 Restructuring Plan Accrual Reconciliation (Details) - Q4 FY17 Restructuring Plan [Member] - USD ($) $ in Thousands		6 Months Ended				12 Months Ended
		Sep. 29, 2018		Jul. 01, 2017		Apr. 01, 2017		Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		$ 81				$ 4,135		$ 139
Restructuring and Related Cost, Incurred Cost		0		$ 24,660		17,074
Payments for Restructuring		(58)				(8,505)
Restructuring Reserve, Settled without Cash		0				(12,565)
Site Closures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		0				888		0
Restructuring and Related Cost, Incurred Cost		0		1,516		627
Payments for Restructuring		0				(1,515)
Restructuring Reserve, Settled without Cash		0				0
Current Asset Impairments and Other Gross Profit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	[1]	0				0		0
Restructuring and Related Cost, Incurred Cost		0	[1]	14,947	[2]	13,278	[1]
Payments for Restructuring	[1]	0				(2,402)
Restructuring Reserve, Settled without Cash	[1]	0				(10,876)
Non-Current Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		0				0		0
Restructuring and Related Cost, Incurred Cost		0		3,033		1,657
Cash Receipts For Restructuring						32
Cash receipt for disposal of restructured assets		0
Restructuring Reserve, Settled without Cash		0				(1,689)
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		0				0		0
Restructuring and Related Cost, Incurred Cost		0		239		175
Payments for Restructuring		0				(175)
Restructuring Reserve, Settled without Cash		0				0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		81				3,247		$ 139
Restructuring and Related Cost, Incurred Cost		0		$ 4,925		1,337
Payments for Restructuring		(58)				(4,445)
Restructuring Reserve, Settled without Cash		$ 0				$ 0

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjllOTFmNDhmOGZmNzQwNjE4YjZhYzU2YmI1NDBiNTNlfFRleHRTZWxlY3Rpb246NjIwMjM3RUJCQkM4NDczRjNFQUMxQTg2RURBM0IyRTIM}

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