Commitments and Contingencies - Additional Information (Detail)	1 Months Ended	12 Months Ended			0 Months Ended				0 Months Ended	1 Months Ended		12 Months Ended		0 Months Ended	1 Months Ended		12 Months Ended		1 Months Ended				6 Months Ended	0 Months Ended				12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended		12 Months Ended
	Feb. 18, 2012	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Feb. 13, 2014 Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2% USD ($)	Feb. 14, 2013 Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2% USD ($)	Dec. 31, 2014 Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2% USD ($)	Jun. 19, 2012 4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023	Feb. 18, 2012 Aruze USA, Inc. USD ($)	Feb. 18, 2012 Aruze USA, Inc. USD ($)	Feb. 22, 2013 Directors	Dec. 31, 2014 Minimum	Dec. 31, 2014 Maximum	May 02, 2012 Cotai Development and Land Concession Contract	Dec. 31, 2011 Cotai Development and Land Concession Contract USD ($)	Sep. 30, 2011 Cotai Development and Land Concession Contract acre	Dec. 31, 2014 Cotai Development and Land Concession Contract USD ($) Installment	Dec. 31, 2013 Cotai Development and Land Concession Contract USD ($)	Jul. 29, 2013 Cotai Development and Land Concession Contract Guarantee Obligations USD ($)	Jul. 29, 2013 Cotai Development and Land Concession Contract Guarantee Obligations HKD	Dec. 31, 2014 Pre Construction Completion Payments USD ($)	Dec. 31, 2014 Post Construction Completion Payments USD ($)	Jun. 30, 2016 Forecast Wynn Palace Room	Apr. 29, 2014 Pending Litigation Redemption Action and Counterclaim	Oct. 29, 2013 Pending Litigation Redemption Action and Counterclaim	May 02, 2013 Pending Litigation Redemption Action and Counterclaim	Apr. 08, 2013 Pending Litigation Redemption Action and Counterclaim	Dec. 31, 2014 Pending Litigation Derivative Claims claim	Feb. 01, 2013 United States District Court, District of Nevada Pending Litigation Derivative Claims	Dec. 31, 2014 United States District Court, District of Nevada Pending Litigation Derivative Claims claim	Jun. 18, 2014 Eighth Judicial District Court of Clark County, Nevada Pending Litigation Derivative Claims	Oct. 13, 2012 Eighth Judicial District Court of Clark County, Nevada Pending Litigation Derivative Claims	Dec. 31, 2014 Eighth Judicial District Court of Clark County, Nevada Pending Litigation Derivative Claims claim
Commitments and Contingencies
Period to complete court-mandated actions after stay																													30 days
Number of new claims filed																												6		4			2
Quantity of land acquired (acres)																51
Land concession contract period (years)														25 years
Total land premium payable																	$ 193,400,000
Down payment of premium															62,500,000
Number of additional semi-annual payments																	8
Individual semi-annual payment of premium (8 total)																	16,400,000
Rate of interest on premium																	5.00%
Land premium payment obligation, current		30,814,000	29,341,000
Land premium payment obligation, noncurrent		15,987,000	46,819,000
Annual lease payments																					800,000	1,100,000
Number of rooms in hotel																							1,700
Total project budget costs																		4,100,000,000
Guaranteed maximum price of contract																			2,600,000,000	20,000,000,000
Bond as a percentage of guaranteed maximum price																			5.00%	5.00%
Project costs incurred																	1,800,000,000
Contingent rentals		87,800,000	101,000,000	94,000,000
Rent expenses		26,100,000	21,900,000	21,500,000
Term of employment agreement												3 years	5 years
Letter of credit outstanding			8,900,000
Percentage of shares voted in favor of removal of Mr. Okada											99.60%
Number of voted shares											86,000,000
Common stock redeemed, shares	24,549,222								24,549,222	24,549,222
Redemption price promissory note, principal amount							1,940,000,000		1,940,000,000.00	1,940,000,000.00
Redemption price promissory note, maturity date									Feb. 18, 2022
Debt instrument, interest rate		2.00%						4.25%	2.00%	2.00%
Interest payment due					$ 38,700,000	$ 38,700,000
Interim status update period																											6 months
Period of stay																								6 months	6 months	6 months					45 days	90 days