Cover - USD ($) $ in Billions	12 Months Ended
	Mar. 31, 2021	May 14, 2021	Sep. 25, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Mar. 31, 2021
Current Fiscal Year End Date	--03-31
Document Transition Report	false
Entity File Number	000-23354
Entity Registrant Name	FLEX LTD.
Entity Incorporation, State or Country Code	U0
Entity Address, Address Line One	2 Changi South Lane,
Entity Address, City or Town	Singapore
Entity Address, Country	SG
Entity Address, Postal Zip Code	486123
City Area Code	65
Local Phone Number	6876-9899
Title of 12(b) Security	Ordinary Shares, No Par Value
Trading Symbol	FLEX
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 5.3
Entity Common Stock, Shares Outstanding (shares)		490,742,161
Documents Incorporated by Reference	Proxy Statement to be delivered to shareholders in connection with the Registrant's 2021 Annual General Meeting of Shareholders
Entity Central Index Key	0000866374
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Period Fiscal Period Focus	FY