RESTRUCTURING (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		30 Months Ended
	Sep. 28, 2019 USD ($)	Sep. 29, 2018 USD ($)	Sep. 28, 2019 USD ($) segment	Sep. 29, 2018 USD ($)	Sep. 28, 2019 USD ($)	Mar. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and turnaround costs	$ 3,757	$ 2,118	$ 5,784	$ 5,467
Restructuring liability	4,200		4,200		$ 4,200
Restructuring liability payable in next twelve months	3,700		$ 3,700		3,700
Number of reportable segments | segment			3
Turnaround costs	2,414	2,151	$ 3,472	5,792
2020 Program
Restructuring Cost and Reserve [Line Items]
Restructuring and turnaround costs	2,900		2,900
Restructuring liability	583		583		583	$ 0
2020 Program | Minimum
Restructuring Cost and Reserve [Line Items]
Expected cost	60,000		60,000		60,000
2020 Program | Maximum
Restructuring Cost and Reserve [Line Items]
Expected cost	70,000		70,000		70,000
2018 Program
Restructuring Cost and Reserve [Line Items]
Restructuring and turnaround costs	$ 900	$ 1,900	$ 2,900	$ 5,300	$ 55,200