CONDENSED 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
Beginning balance (in shares) at Mar. 31, 2018		528,078,000
Beginning balance at Mar. 31, 2018	$ 3,018,573	$ 6,248,532	$ (3,144,114)	$ (35,746)	$ (50,099)	$ (85,845)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(4,429,000)
Repurchase of Flex Ltd. ordinary shares at cost	(59,980)	$ (59,980)
Exercise of stock options (in shares)		75,000
Exercise of stock options	131	$ 131
Issuance of Flex Ltd. vested shares under restricted share unit awards (in shares)		5,163,000
Net income (loss)	202,920		202,920
Stock-based compensation, net of tax	40,033	$ 40,033
Cumulative effect on opening equity of adopting accounting standards and other (in shares)		(296,000)
Cumulative effect on opening equity of adopting accounting standards and other	38,406		38,702
Total other comprehensive loss	(70,536)			(19,828)	(50,708)	(70,536)
Ending balance (in shares) at Sep. 28, 2018		528,887,000
Ending balance at Sep. 28, 2018	3,169,547	$ 6,228,420	(2,902,492)	(55,574)	(100,807)	(156,381)
Beginning balance (in shares) at Jun. 29, 2018		532,736,000
Beginning balance at Jun. 29, 2018	3,109,319	$ 6,269,529	(2,989,376)	(76,649)	(94,185)	(170,834)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(4,429,000)
Repurchase of Flex Ltd. ordinary shares at cost	(59,980)	$ (59,980)
Exercise of stock options (in shares)		32,000
Exercise of stock options	86	$ 86
Issuance of Flex Ltd. vested shares under restricted share unit awards (in shares)		548,000
Net income (loss)	86,885		86,885
Stock-based compensation, net of tax	19,081	$ 19,081
Cumulative effect on opening equity of adopting accounting standards and other (in shares)		(296,000)
Cumulative effect on opening equity of adopting accounting standards and other	(297)		(1)
Total other comprehensive loss	14,453			21,075	(6,622)	14,453
Ending balance (in shares) at Sep. 28, 2018		528,887,000
Ending balance at Sep. 28, 2018	$ 3,169,547	$ 6,228,420	(2,902,492)	(55,574)	(100,807)	(156,381)
Beginning balance (in shares) at Mar. 31, 2019	516,548,265	516,548,000
Beginning balance at Mar. 31, 2019	$ 2,972,360	$ 6,135,535	(3,012,012)	(41,556)	(109,607)	(151,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(10,953,000)
Repurchase of Flex Ltd. ordinary shares at cost	(112,158)	$ (112,158)
Exercise of stock options (in shares)		178,000
Exercise of stock options	728	$ 728
Issuance of Flex Ltd. vested shares under restricted share unit awards (in shares)		3,377,000
Net income (loss)	(72,068)		(72,068)
Stock-based compensation, net of tax	34,117	$ 34,117
Cumulative effect on opening equity of adopting accounting standards and other (in shares)		(440,000)
Cumulative effect on opening equity of adopting accounting standards and other	21,583		22,023
Total other comprehensive loss	$ (38,601)			(17,098)	(21,503)	(38,601)
Ending balance (in shares) at Sep. 27, 2019	509,149,926	509,150,000
Ending balance at Sep. 27, 2019	$ 2,805,961	$ 6,057,782	(3,062,057)	(58,654)	(131,110)	(189,764)
Beginning balance (in shares) at Jun. 28, 2019		514,039,000
Beginning balance at Jun. 28, 2019	3,001,815	$ 6,099,166	(2,945,117)	(47,031)	(105,203)	(152,234)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(5,928,000)
Repurchase of Flex Ltd. ordinary shares at cost	(60,159)	$ (60,159)
Exercise of stock options (in shares)		61,000
Exercise of stock options	325	$ 325
Issuance of Flex Ltd. vested shares under restricted share unit awards (in shares)		978,000
Net income (loss)	(116,940)		(116,940)
Stock-based compensation, net of tax	18,890	$ 18,890
Cumulative effect on opening equity of adopting accounting standards and other (in shares)		(440,000)
Cumulative effect on opening equity of adopting accounting standards and other	(440)
Total other comprehensive loss	$ (37,530)			(11,623)	(25,907)	(37,530)
Ending balance (in shares) at Sep. 27, 2019	509,149,926	509,150,000
Ending balance at Sep. 27, 2019	$ 2,805,961	$ 6,057,782	$ (3,062,057)	$ (58,654)	$ (131,110)	$ (189,764)