Cover - USD ($)	12 Months Ended
	Mar. 28, 2020	Apr. 24, 2020	Sep. 28, 2019
Cover [Abstract]
Document Annual Report	true
Document Transition Report	false
Title of 12(b) Security	Common stock, $0.01 par value
Entity Incorporation, State or Country Code	DE
Document Type	10-K
Amendment Flag	false
Document Period End Date	Mar. 28, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Registrant Name	XILINX, INC
Entity Central Index Key	0000743988
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--03-28
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		243,846,000
Entity Public Float			$ 19,724,323,000
Entity File Number	000-18548
Entity Address, Address Line One	2100 Logic Drive
Entity Tax Identification Number	77-0188631
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95124
City Area Code	408
Local Phone Number	559-7778
Trading Symbol	XLNX
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes