EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Basic earnings per share attributable to the shareholders of Flex Ltd.
Net income	$ 233	$ 237	$ 850	$ 670
Net income attributable to noncontrolling interest and redeemable noncontrolling interest	36	7	239	19
Net income attributable to Flex Ltd.	$ 197	$ 230	$ 611	$ 651
Shares used in computation:
Weighted-average ordinary shares outstanding (in shares)	431	452	440	455
Basic earnings per share (in dollars per share)	$ 0.46	$ 0.51	$ 1.39	$ 1.43
Diluted earnings per share attributable to the shareholders of Flex Ltd.
Net income	$ 233	$ 237	$ 850	$ 670
Net income attributable to noncontrolling interest and redeemable noncontrolling interest	36	7	239	19
Net income attributable to Flex Ltd.	$ 197	$ 230	$ 611	$ 651
Shares used in computation:
Weighted-average ordinary shares outstanding (in shares)	431	452	440	455
Weighted-average ordinary share equivalents from RSU awards (in shares)	5	7	6	7
Weighted-average ordinary shares and ordinary share equivalents outstanding (in shares)	436	459	446	462
Diluted earnings per share (in dollars per share)	$ 0.45	$ 0.50	$ 1.37	$ 1.41