SEGMENT AND ENTERPRISE-WIDE INFORMATION (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 28, 2020 USD ($)	Dec. 28, 2019 USD ($)	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 28, 2020 USD ($) unit	Mar. 30, 2019 USD ($)	Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of business units | unit									3
Net revenues by business unit									$ 980,902	$ 953,159	$ 888,743
Effect of exchange rates									(12,253)	(5,486)	(5,394)
Net revenues	$ 238,492	$ 258,970	$ 252,566	$ 238,451	$ 249,295	$ 247,356	$ 241,581	$ 229,347	988,479	967,579	903,923
Operating (loss) income	26,007	$ 40,907	$ 49,739	$ (13,302)	23,856	$ 28,320	$ 26,076	$ 5,293	103,351	83,545	56,157
Effect of exchange rates									7,920	8,367	4,060
Restructuring Costs and Asset Impairment Charges									(51,220)	(21,170)	(1,941)
Deal amortization									25,746	24,803	26,013
Restructuring and Related Cost, Accelerated Depreciation									24,530	19,126	0
Impairment of assets and other related charges (2)									(19,878)	(13,660)	(44,125)
European Medical Device Regulation Costs									1,506	0	0
PCS2 accelerated depreciation and related costs									133	(2,726)	(3,011)
Gain on sale of assets (4)									8,083	0	0
Depreciation and amortization									110,289	109,418	89,247
Total long-lived assets	253,399				343,979				253,399	343,979	332,156
Service [Member]
Segment Reporting Information [Line Items]
Net revenues									19,830	19,906	20,574
Plasma products and services
Segment Reporting Information [Line Items]
Net revenues									537,231	501,837	435,956
Blood Center products and services
Segment Reporting Information [Line Items]
Net revenues									252,829	269,203	284,902
Hospital products and services
Segment Reporting Information [Line Items]
Net revenues									198,419	196,539	183,065
United States
Segment Reporting Information [Line Items]
Net revenues									646,204	606,845	548,731
Total long-lived assets	186,488				269,849				186,488	269,849	236,603
Japan
Segment Reporting Information [Line Items]
Net revenues									72,218	69,908	67,319
Total long-lived assets	2,037				1,726				2,037	1,726	1,511
Europe
Segment Reporting Information [Line Items]
Net revenues									153,347	164,504	164,226
Total long-lived assets	10,143				11,200				10,143	11,200	13,696
Asia
Segment Reporting Information [Line Items]
Net revenues									109,295	118,700	115,127
Total long-lived assets	29,175				30,930				29,175	30,930	36,431
Other
Segment Reporting Information [Line Items]
Net revenues									7,415	7,622	8,520
Total long-lived assets	25,556				30,274				25,556	30,274	43,915
Japan
Segment Reporting Information [Line Items]
Net revenues by business unit									460,637	426,781	363,254
Depreciation and amortization									38,429	38,074	47,985
Total long-lived assets	141,903				192,628				141,903	192,628	186,007
Blood Center
Segment Reporting Information [Line Items]
Net revenues by business unit									325,661	335,557	347,373
Depreciation and amortization									8,513	9,623	11,439
Total long-lived assets	93,758				127,272				93,758	127,272	122,898
North America Plasma
Segment Reporting Information [Line Items]
Depreciation and amortization									63,347	61,721	29,823
Total long-lived assets	$ 17,738				$ 24,079				17,738	24,079	23,251
Hospital
Segment Reporting Information [Line Items]
Net revenues by business unit									194,604	190,821	178,116
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating (loss) income									465,822	420,266	384,416
Operating Segments [Member] | Japan
Segment Reporting Information [Line Items]
Operating (loss) income									225,351	180,300	146,986
Operating Segments [Member] | Blood Center
Segment Reporting Information [Line Items]
Operating (loss) income									159,802	163,628	170,172
Operating Segments [Member] | Hospital
Segment Reporting Information [Line Items]
Operating (loss) income									80,669	76,338	67,258
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Corporate expenses (1)									$ (255,727)	$ (263,603)	$ (257,229)