Commitments and Contingencies - Additional Information (Detail)					1 Months Ended	12 Months Ended
	Feb. 26, 2019 USD ($)	Sep. 17, 2018 USD ($)	Mar. 30, 2018 USD ($)	Feb. 18, 2012 USD ($) shares	Feb. 18, 2012 USD ($) shares	Dec. 31, 2018 USD ($) ft² Room	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Apr. 28, 2017 USD ($)	Jun. 19, 2012
Commitments and Contingencies
Contingent rentals						$ 53,800,000	$ 38,600,000	$ 34,600,000
Rent expenses						27,100,000	18,300,000	17,900,000
2019						168,646,000
2020						80,548,000
2021						56,393,000
2022						27,088,000
2023						4,980,000
Common stock redeemed, shares | shares					24,549,222
Litigation settlement			$ 463,600,000			$ 463,557,000	$ 0	$ 0
Released accrued interest held in escrow			$ 232,400,000
Damages sought		$ 1,000,000,000
4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023
Commitments and Contingencies
Debt instrument, interest rate										4.25%
Wynn MA, LLC
Commitments and Contingencies
Guaranteed maximum construction price									$ 1,320,000,000.00
Wynn Las Vegas
Commitments and Contingencies
Number of rooms in hotel | Room						4,748
Wynn Palace
Commitments and Contingencies
Number of rooms in hotel | Room						1,706
Aruze USA, Inc.
Commitments and Contingencies
Common stock redeemed, shares | shares				24,549,222
Redemption price promissory note, principal amount				$ 1,940,000,000	$ 1,940,000,000
Minimum
Commitments and Contingencies
Term of employment agreement						3 years
Maximum
Commitments and Contingencies
Term of employment agreement						5 years
Employment Contracts
Commitments and Contingencies
2019						$ 72,900,000
2020						49,000,000
2021						19,100,000
2022						2,900,000
2023						500,000
Community payments associated with Encore Boston Harbor
Commitments and Contingencies
Community Payments						10,600,000
Construction Performance Bond | Wynn MA, LLC
Commitments and Contingencies
Performance Bond									$ 350,000,000
Wynn America Credit Facilities | Wynn America | Revolving Credit Facility
Commitments and Contingencies
Letter of credit outstanding						17,700,000
Meeting and Convention Space | Wynn Las Vegas
Commitments and Contingencies
Guaranteed maximum construction price						$ 286,800,000.0
Functional area square footage under construction | ft²						430,000
Subsequent Event | Nevada Gaming Control Board Fine
Commitments and Contingencies
Amount of fine for approved Stipulation and Settlement	$ 20,000,000