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 (in shares) at Mar. 31, 2017		531,294,000
Beginning 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
Increase (Decrease) in Shareholders' Equity
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(10,829,000)
Repurchase of Flex Ltd. ordinary shares at cost	(180,050)	$ (180,050)					(180,050)
Exercise of stock options (in shares)		667,000
Exercise of stock options	3,030	$ 2,774					2,774	256
Issuance of Flex Ltd. vested shares under share bonus awards (in shares)		6,946,000
Issuance of subsidiary shares, net	63,363							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 (in shares) at Mar. 31, 2018		528,078,000
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
Increase (Decrease) in Shareholders' Equity
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(17,726,000)
Repurchase of Flex Ltd. ordinary shares at cost	(188,978)	$ (188,978)					(188,978)
Exercise of stock options (in shares)		244,000
Exercise of stock options	245	$ 245					245
Issuance of Flex Ltd. vested shares under share bonus awards (in shares)		5,952,000
Net income	93,399		93,399				93,399
Stock-based compensation, net of tax	76,032	$ 76,032					76,032
Cumulative effect on opening equity of adopting accounting standards and other	38,407	$ (296)	38,703				38,407
Total other comprehensive income	$ (65,318)			(5,810)	(59,508)	(65,318)	(65,318)
Ending balance (in shares) at Mar. 31, 2019	516,548,265	516,548,000
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
Increase (Decrease) in Shareholders' Equity
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(23,672,000)
Repurchase of Flex Ltd. ordinary shares at cost	(259,913)	$ (259,913)					(259,913)
Exercise of stock options (in shares)		327,000
Exercise of stock options	1,502	$ 1,502					1,502
Issuance of Flex Ltd. vested shares under share bonus awards (in shares)		4,223,000
Net income	87,579		87,579				87,579
Stock-based compensation, net of tax	71,546	$ 71,546					71,546
Cumulative effect on opening equity of adopting accounting standards and other	21,583	$ (440)	22,023				21,583
Total other comprehensive income	$ (63,504)			(40,107)	(23,397)	(63,504)	(63,504)
Ending balance (in shares) at Mar. 31, 2020	497,426,277	497,426,000
Ending balance at Mar. 31, 2020	$ 2,831,153	$ 5,948,230	$ (2,902,410)	$ (81,663)	$ (133,004)	$ (214,667)	$ 2,831,153	$ 0