CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Ordinary Shares	Accumulated Deficit	Unrealized Gain (Loss) on Derivative Instruments And Other	Foreign Currency Translation Adjustments	Total Accumulated Other Comprehensive Loss	Total Flex Ltd. Shareholders' Equity	Noncontrolling Interests
Beginning balance (shares) at Mar. 31, 2016		544,823,000
Beginning balance at Mar. 31, 2016	$ 2,605,530	$ 6,598,999	$ (3,892,212)	$ (41,522)	$ (94,393)	$ (135,915)	$ 2,570,872	$ 34,658
Increase (Decrease) in Shareholders' Equity
Repurchase of Flex Ltd. ordinary shares at cost (shares)		(25,125,000)
Repurchase of Flex Ltd. ordinary shares at cost	$ (345,782)	$ (345,782)					(345,782)
Exercise of stock options (shares)	2,283,201	2,283,000
Exercise of stock options	$ 13,048	$ 12,438					12,438	610
Issuance of Flex Ltd. vested shares under share bonus awards (shares)		9,313,000
Issuance of subsidiary shares	9,306	$ 0					0	9,306
Net income	311,072		319,564				319,564	(8,492)
Stock-based compensation, net of tax	77,330	79,669					79,669	(2,339)
Total other comprehensive income	7,772			9,096	(1,324)	7,772	7,772
Ending balance at Mar. 31, 2017	2,678,276	$ 6,345,324	(3,572,648)	(32,426)	(95,717)	(128,143)	2,644,533	33,743
Ending balance (shares) at Mar. 31, 2017		531,294,000
Increase (Decrease) in Shareholders' Equity
Repurchase of Flex Ltd. ordinary shares at cost (shares)		(10,829,000)
Repurchase of Flex Ltd. ordinary shares at cost	$ (180,050)	$ (180,050)					(180,050)
Exercise of stock options (shares)	667,184	667,000
Exercise of stock options	$ 3,030	$ 2,774					2,774	256
Issuance of Flex Ltd. vested shares under share bonus awards (shares)		6,946,000
Issuance of subsidiary shares, net	63,363	$ 0					0	63,363
Net income	420,961		428,534				428,534	(7,573)
Stock-based compensation, net of tax	81,333	80,484					80,484	849
Deconsolidation of subsidiary entity	(90,638)							(90,638)
Total other comprehensive income	42,298			(3,320)	45,618	42,298	42,298
Ending balance at Mar. 31, 2018	$ 3,018,573	$ 6,248,532	(3,144,114)	(35,746)	(50,099)	(85,845)	3,018,573	0
Ending balance (shares) at Mar. 31, 2018	528,078,493	528,078,000
Increase (Decrease) in Shareholders' Equity
Repurchase of Flex Ltd. ordinary shares at cost (shares)		(17,726,000)
Repurchase of Flex Ltd. ordinary shares at cost	$ (188,978)	$ (188,978)					(188,978)
Exercise of stock options (shares)	244,393	244,000
Exercise of stock options	$ 245	$ 245					245	0
Issuance of Flex Ltd. vested shares under share bonus awards (shares)		5,952,000
Net income	93,399		93,399				93,399	0
Stock-based compensation, net of tax	76,032	$ 76,032					76,032	0
Total other comprehensive income	(65,318)			(5,810)	(59,508)	(65,318)	(65,318)
Ending balance at Mar. 31, 2019	$ 2,972,360	$ 6,135,535	$ (3,012,012)	$ (41,556)	$ (109,607)	$ (151,163)	$ 2,972,360	$ 0
Ending balance (shares) at Mar. 31, 2019	516,548,265	516,548,000