| Document and Entity Information | Oct. 14, 2020 |
| Cover [Abstract] | |
| Title of 12(b) Security | Common stock, par value $0.01 |
| Entity Incorporation, State or Country Code | NV |
| Entity File Number | 000-50028 |
| Entity Tax Identification Number | 46-0484987 |
| Entity Address, Address Line One | 3131 Las Vegas Boulevard South |
| Entity Address, City or Town | Las Vegas, |
| Entity Address, State or Province | NV |
| Document Type | 8-K |
| Entity Registrant Name | WYNN RESORTS, LIMITED |
| Entity Central Index Key | 0001174922 |
| Document Period End Date | Oct. 14, 2020 |
| Entity Address, Postal Zip Code | 89109 |
| City Area Code | 702 |
| Local Phone Number | 770-7555 |
| Written Communications | false |
| Trading Symbol | WYNN |
| Security Exchange Name | NASDAQ |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
