DISCONTINUED OPERATIONS - Additional Information (Details) - Nextracker - Discontinued Operations, Disposed of by Means Other than Sale, Spinoff - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Effect of intercompany transactions eliminated	$ 99	$ 59	$ 50
Pre-tax income from discontinued operations attributable to noncontrolling interest	145	0	0
Provision for income taxes attributable to noncontrolling interest	94	197	0
Distributions to redeemable noncontrolling interest	0	43	4
Pre-tax income attributable to Flex Ltd from discontinued operations	177	167	81
Discontinued operation, intracompany transactions eliminated, cash flows from operating activities	$ 54	$ (23)	$ 11