SEGMENT REPORTING AND GEOGRAPHIC INFORMATION SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Segments Results for Revenue and Gross Margin (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment gross profit as reviewed by CODM	$ (10,328)	$ 143,846	$ 206,071	$ 212,646	$ 216,530	$ 215,137	$ 152,629	$ 109,843	$ 552,235	$ 694,139	$ 439,115
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment revenues as reviewed by CODM									1,730,943	1,759,359	856,903
Total segment gross profit as reviewed by CODM									898,594	928,952	444,322
Operating Segments | Products Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment revenues as reviewed by CODM									1,434,635	1,518,687	856,903
Total segment gross profit as reviewed by CODM									697,212	766,068	444,322
Operating Segments | Services Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total segment revenues as reviewed by CODM									296,308	240,672	0
Total segment gross profit as reviewed by CODM									$ 201,382	$ 162,884	$ 0