| Cover Page | Aug. 08, 2019 |
| Cover page. | |
| Amendment Flag | false |
| Document Type | 8-K |
| Document Period End Date | Aug. 8, 2019 |
| Entity Registrant Name | XILINX, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-18548 |
| Entity Tax Identification Number | 77-0188631 |
| Entity Address, Address Line One | 2100 Logic Drive, |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | XLNX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000743988 |
