CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Ordinary Shares	Accumulated Deficit	Unrealized Loss on Derivative Instruments and Other	Foreign Currency Translation Adjustments	Total Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Mar. 31, 2020		497,000,000
Beginning balance at Mar. 31, 2020	$ 2,831	$ 5,948	$ (2,902)	$ (82)	$ (133)	$ (215)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(2,000,000)
Repurchase of Flex Ltd. ordinary shares at cost	(38)	$ (38)
Issuance of Flex Ltd. vested shares under restricted share unit awards (in shares)		4,000,000
Net income	373		373
Stock-based compensation	62	$ 62
Total other comprehensive income (loss)	153			66	87	153
Ending balance (in shares) at Dec. 31, 2020		499,000,000
Ending balance at Dec. 31, 2020	3,381	$ 5,972	(2,529)	(16)	(46)	(62)
Beginning balance (in shares) at Sep. 25, 2020		501,000,000
Beginning balance at Sep. 25, 2020	3,115	$ 5,985	(2,737)	(45)	(88)	(133)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(2,000,000)
Repurchase of Flex Ltd. ordinary shares at cost	(38)	$ (38)
Net income	208		208
Stock-based compensation	25	$ 25
Total other comprehensive income (loss)	71			29	42	71
Ending balance (in shares) at Dec. 31, 2020		499,000,000
Ending balance at Dec. 31, 2020	$ 3,381	$ 5,972	(2,529)	(16)	(46)	(62)
Beginning balance (in shares) at Mar. 31, 2021	492,567,845	492,000,000
Beginning balance at Mar. 31, 2021	$ 3,436	$ 5,844	(2,289)	(42)	(77)	(119)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(32,000,000)
Repurchase of Flex Ltd. ordinary shares at cost	(580)	$ (580)
Exercise of stock options (in shares)		1,000,000
Exercise of stock options	0
Issuance of Flex Ltd. vested shares under restricted share unit awards (in shares)		6,000,000
Net income	769		769
Stock-based compensation	69	$ 69
Total other comprehensive income (loss)	$ (39)			(20)	(19)	(39)
Ending balance (in shares) at Dec. 31, 2021	466,619,585	467,000,000
Ending balance at Dec. 31, 2021	$ 3,655	$ 5,333	(1,520)	(62)	(96)	(158)
Beginning balance (in shares) at Oct. 01, 2021		471,000,000
Beginning balance at Oct. 01, 2021	3,514	$ 5,398	(1,747)	(49)	(88)	(137)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Flex Ltd. ordinary shares at cost (in shares)		(5,000,000)
Repurchase of Flex Ltd. ordinary shares at cost	(90)	$ (90)
Issuance of Flex Ltd. vested shares under restricted share unit awards (in shares)		1,000,000
Net income	227		227
Stock-based compensation	25	$ 25
Total other comprehensive income (loss)	$ (21)			(13)	(8)	(21)
Ending balance (in shares) at Dec. 31, 2021	466,619,585	467,000,000
Ending balance at Dec. 31, 2021	$ 3,655	$ 5,333	$ (1,520)	$ (62)	$ (96)	$ (158)