Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2015	May 16, 2014
Share-based Compensation Arrangement by Share-based Payment Award
Payments to Employees	$ 1,800
Stock-based compensation expense	35,040	$ 43,971	$ 43,722
Stock based compensation costs	35,051	44,051	43,814
Stock-based compensation capitalized into construction	11	80	92
Tax benefit from compensation expense	5,700	10,800	10,400
Tax benefits (loss) realized from option exercises	$ 4,600	$ 25,400	$ 6,700
WRL 2002 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Shares authorized for issuance	12,750,000
Share Award Plan
Share-based Compensation Arrangement by Share-based Payment Award
Shares authorized for issuance				50,000,000
Aggregate amount of common stock available for grant	33,362,988
Unvested awards compensation not yet recognized	$ 12,700
Unvested awards compensation costs period of recognition	2 years 9 months 25 days
Wynn Resorts Limited 2014 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award
Shares authorized for issuance					4,409,390
Expiration period	10 years
Aggregate amount of common stock available for grant	3,041,051
Unrecognized compensation, stock options	$ 600
Unrecognized compensation cost, weighted average period	4 months 2 days
Unvested awards compensation not yet recognized	$ 49,600
Unvested awards compensation costs period of recognition	3 years 7 months 28 days
Stock options granted (in shares)	0	0
Expected dividend yield			2.00%
Expected volatility			45.40%
Risk-free interest rate			1.10%
Expected term (years)			6 years
Share Option Plan
Share-based Compensation Arrangement by Share-based Payment Award
Shares authorized for issuance	518,750,000
Aggregate amount of common stock available for grant	507,244,000
Unrecognized compensation, stock options	$ 3,400
Unrecognized compensation cost, weighted average period	4 years 3 months 19 days
Expected dividend yield	5.70%	5.70%	6.30%
Expected volatility	40.20%	41.50%	42.60%
Risk-free interest rate	2.30%	1.10%	1.00%
Expected term (years)	6 years 6 months	6 years 6 months	6 years 6 months
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense	$ 5,800
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Stock based compensation costs	$ 6,700	$ 23,700	$ 19,200