SEGMENT REPORTING (Details) $ in Millions	3 Months Ended
Jul. 02, 2021 USD ($) segment	Jun. 26, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments \| segment	2
Number of reporting segments \| segment	2
Net sales	$ 6,342	$ 5,153
Income before income taxes	233	67
Intangible amortization	15	15
Stock-based compensation	20	13
Interest and other, net	22	31
Flex Agility Solutions
Segment Reporting Information [Line Items]
Net sales	3,432	2,912
Flex Reliability Solutions
Segment Reporting Information [Line Items]
Net sales	2,910	2,241
Operating Segments
Segment Reporting Information [Line Items]
Net sales	6,342	5,153
Income before income taxes	290	163
Operating Segments \| Flex Agility Solutions
Segment Reporting Information [Line Items]
Net sales	3,432	2,912
Income before income taxes	137	72
Operating Segments \| Flex Reliability Solutions
Segment Reporting Information [Line Items]
Net sales	2,910	2,241
Income before income taxes	170	115
Operating Segments \| Corporate and Other
Segment Reporting Information [Line Items]
Income before income taxes	(17)	(24)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Intangible amortization	15	15
Stock-based compensation	20	13
Restructuring charges	0	10
Legal and other	0	27
Interest and other, net	$ 22	$ 31

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