Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 16, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	000-50028
Entity Registrant Name	WYNN RESORTS, LIMITED
Entity Incorporation, State or Country Code	NV
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
Entity Address, Postal Zip Code	89109
City Area Code	702
Local Phone Number	770-7555
Title of 12(b) Security	Common Stock, par value $0.01
Trading Symbol	WYNN
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			$ 7,270
Entity Common Stock, Shares Outstanding		115,615,473
Documents Incorporated by Reference	Portions of the registrant's Proxy Statement for its 2021 Annual Meeting of Stockholders to be filed not later than 120 days after the end of the fiscal year covered by this report are incorporated by reference into Part III of this Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0001174922
Current Fiscal Year End Date	--12-31