CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 26,041.0	$ 24,124.0	$ 24,210.0
Cost of sales	24,094.0	22,349.0	22,681.0
Restructuring charges	15.0	88.0	190.0
Gross profit	1,932.0	1,687.0	1,339.0
Selling, general and administrative expenses	892.0	817.0	834.0
Intangible amortization	67.9	61.8	64.1
Restructuring charges	0.0	13.0	26.0
Operating income	972.0	795.0	415.0
Interest, net	152.0	148.0	174.0
Other charges (income), net	(225.0)	(67.0)	82.0
Income before income taxes	1,045.0	714.0	159.0
Provision for income taxes	105.0	101.0	71.0
Net income	940.0	613.0	88.0
Net income attributable to redeemable noncontrolling interest	4.0	0.0	0.0
Net income attributable to Flex Ltd.	$ 936.0	$ 613.0	$ 88.0
Earnings per share attributable to the shareholders of Flex Ltd.:
Basic (in dollars per share)	$ 1.97	$ 1.23	$ 0.17
Diluted (in dollars per share)	$ 1.94	$ 1.21	$ 0.17
Weighted-average shares used in computing per share amounts:
Basic (in shares)	476	499	509
Diluted (in shares)	483	506	512