Long-Term Debt - Additional Information (Detail)	0 Months Ended	1 Months Ended	12 Months Ended			1 Months Ended		0 Months Ended		0 Months Ended			0 Months Ended					1 Months Ended		12 Months Ended	1 Months Ended			12 Months Ended				0 Months Ended		0 Months Ended			0 Months Ended					1 Months Ended	12 Months Ended				12 Months Ended				1 Months Ended	9 Months Ended	12 Months Ended				1 Months Ended	12 Months Ended			1 Months Ended			12 Months Ended		0 Months Ended	1 Months Ended				12 Months Ended		1 Months Ended	12 Months Ended			12 Months Ended	1 Months Ended						1 Months Ended	12 Months Ended								1 Months Ended	12 Months Ended				0 Months Ended		0 Months Ended		1 Months Ended
	Feb. 10, 2015 USD ($)	Feb. 18, 2012	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Oct. 31, 2009 7 7/8% Wynn Las Vegas First Mortgage Notes, Due November 1, 2017	Nov. 30, 2013 7 7/8% Wynn Las Vegas First Mortgage Notes, Due November 1, 2017	Oct. 16, 2013 The 2021 Notes	Oct. 16, 2013 The 2021 Notes	Oct. 16, 2013 The 2021 Notes Minimum	Oct. 16, 2013 The 2021 Notes Maximum	Oct. 16, 2013 Original 2021 Notes USD ($)	Mar. 20, 2014 Additional 2021 Notes USD ($)	Oct. 16, 2013 Additional 2021 Notes	Mar. 20, 2014 Additional 2021 Notes USD ($)	Oct. 16, 2013 Additional 2021 Notes USD ($)	Dec. 31, 2014 4.25% Senior Notes Due 2023 and 5.50% Senior Notes Due 2025	Dec. 31, 2012 Wynn Macau Amended Wynn Macau Credit Facilities USD ($)	Jul. 31, 2012 Wynn Macau Amended Wynn Macau Credit Facilities USD ($)	Dec. 31, 2014 Wynn Macau Amended Wynn Macau Credit Facilities	Jul. 31, 2012 Wynn Macau Amended Wynn Macau Credit Facilities Hong Kong Interbank Offered Rate (HIBOR)	Jul. 31, 2012 Wynn Macau Amended Wynn Macau Credit Facilities Hong Kong Interbank Offered Rate (HIBOR) Minimum	Jul. 31, 2012 Wynn Macau Amended Wynn Macau Credit Facilities Hong Kong Interbank Offered Rate (HIBOR) Maximum	Dec. 31, 2014 Wynn Macau Bank Guarantee Reimbursement Agreement Performance Guarantee USD ($)	Dec. 31, 2014 Wynn Macau Bank Guarantee Reimbursement Agreement Performance Guarantee MOP	Dec. 31, 2014 Wynn Macau Revolving Credit Facility Amended Wynn Macau Credit Facilities USD ($)	Jul. 31, 2012 Wynn Macau Revolving Credit Facility Amended Wynn Macau Credit Facilities USD ($)	Jul. 30, 2013 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans USD ($)	Jul. 31, 2012 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans USD ($)	Nov. 20, 2014 Wynn America Wynn America Credit Facilities USD ($)	Dec. 31, 2014 Wynn America Wynn America Credit Facilities USD ($)	Nov. 20, 2014 Wynn America Wynn America Credit Facilities USD ($)	Nov. 20, 2014 Wynn America Wynn America Credit Facilities Base Rate	Nov. 20, 2014 Wynn America Wynn America Credit Facilities Eurodollar Rate	Dec. 31, 2014 Wynn America Revolving Credit Facility Wynn America Credit Facilities USD ($)	Nov. 20, 2014 Wynn America Revolving Credit Facility Wynn America Credit Facilities USD ($)	Nov. 20, 2014 Wynn America Term Loans Wynn America Credit Facilities USD ($)	Oct. 16, 2013 Wynn Macau Limited Senior Notes 5 1/4% Wynn Macau Senior Notes, Due October 15, 2021	Dec. 31, 2014 Wynn Macau Limited Senior Notes 5 1/4% Wynn Macau Senior Notes, Due October 15, 2021	Dec. 31, 2013 Wynn Macau Limited Senior Notes 5 1/4% Wynn Macau Senior Notes, Due October 15, 2021	Dec. 31, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due November 1, 2017	Dec. 31, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due November 1, 2017	Dec. 31, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 USD ($)	Dec. 31, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020	Apr. 30, 2010 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 USD ($)	Dec. 31, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 Minimum USD ($)	Apr. 30, 2010 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 Maximum	Sep. 30, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020 USD ($)	Dec. 31, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020	Dec. 31, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020	Aug. 31, 2010 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020 USD ($)	Dec. 31, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020 Minimum USD ($)	Aug. 31, 2010 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020 Maximum	Dec. 31, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 5 3/8% Wynn Las Vegas First Mortgage Notes, Due March 15, 2022 USD ($)	Dec. 31, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 5 3/8% Wynn Las Vegas First Mortgage Notes, Due March 15, 2022	Mar. 01, 2012 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 5 3/8% Wynn Las Vegas First Mortgage Notes, Due March 15, 2022 USD ($)	Oct. 16, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023	May 22, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023 USD ($)	May 15, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023	Dec. 31, 2014 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023	Dec. 31, 2013 Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 4 1/4% Wynn Las Vegas Senior Notes Due May 30, 2023 USD ($)	Feb. 18, 2012 Aruze USA, Inc. USD ($)	Feb. 18, 2012 Aruze USA, Inc. USD ($)	Feb. 13, 2014 Aruze USA, Inc. Promissory Note Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2% USD ($)	Feb. 14, 2013 Aruze USA, Inc. Promissory Note Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2% USD ($)	Feb. 18, 2012 Aruze USA, Inc. Promissory Note Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2% USD ($)	Dec. 31, 2014 Aruze USA, Inc. Promissory Note Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2% USD ($)	Dec. 31, 2013 Aruze USA, Inc. Promissory Note Redemption Price Promissory Note With Former Stockholder and Related Party, Due February 18, 2022; Interest At 2%	Nov. 30, 2014 World Travel, LLC Secured Debt $42 Million Note Payable, Due April 1, 2017 USD ($)	Dec. 31, 2014 World Travel, LLC Secured Debt $42 Million Note Payable, Due April 1, 2017 USD ($)	Dec. 31, 2013 World Travel, LLC Secured Debt $42 Million Note Payable, Due April 1, 2017 USD ($)	Mar. 30, 2007 World Travel, LLC Secured Debt $42 Million Note Payable, Due April 1, 2017 USD ($)	Dec. 31, 2014 World Travel, LLC Secured Debt $42 Million Note Payable, Due April 1, 2017 London Interbank Offered Rate (LIBOR) BasisPoint	Jul. 31, 2012 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans	Dec. 31, 2014 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans USD ($)	Dec. 31, 2013 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans USD ($)	Dec. 31, 2013 Wynn Macau Term Loans 7 7/8% Wynn Las Vegas First Mortgage Notes, Due November 1, 2017 USD ($)	Dec. 31, 2014 Wynn Macau Term Loans 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 USD ($)	Dec. 31, 2013 Wynn Macau Term Loans 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 USD ($)	Jul. 31, 2012 Due July 31, 2017 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans	Dec. 31, 2014 Due July 31, 2017 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans	Dec. 31, 2013 Due July 31, 2017 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans	Dec. 31, 2014 Due July 31, 2017 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Minimum	Dec. 31, 2013 Due July 31, 2017 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Minimum	Dec. 31, 2014 Due July 31, 2017 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Maximum	Dec. 31, 2013 Due July 31, 2017 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Maximum	Dec. 31, 2014 Due July 31, 2018 Term Loans Senior Secured Credit Facility Term Loans	Dec. 31, 2013 Due July 31, 2018 Term Loans Senior Secured Credit Facility Term Loans	Jul. 31, 2012 Due July 31, 2018 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans	Dec. 31, 2014 Due July 31, 2018 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Minimum	Dec. 31, 2013 Due July 31, 2018 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Minimum	Dec. 31, 2014 Due July 31, 2018 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Maximum	Dec. 31, 2013 Due July 31, 2018 Wynn Macau Term Loans Senior Secured Credit Facility Term Loans Maximum	Feb. 10, 2015 Subsequent Event Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 USD ($)	Feb. 10, 2015 Subsequent Event Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 7/8% Wynn Las Vegas First Mortgage Notes, Due May 1, 2020 USD ($)	Feb. 10, 2015 Subsequent Event Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020 USD ($)	Feb. 10, 2015 Subsequent Event Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp First Mortgage Notes 7 3/4% Wynn Las Vegas First Mortgage Notes, Due August 15, 2020 USD ($)	Jul. 31, 2012 Revolving Credit Facility Wynn Macau Line of Credit London Interbank Offered Rate (LIBOR)	Jul. 31, 2012 Revolving Credit Facility Wynn Macau Line of Credit London Interbank Offered Rate (LIBOR) Minimum	Jul. 31, 2012 Revolving Credit Facility Wynn Macau Line of Credit London Interbank Offered Rate (LIBOR) Maximum
Debt Instrument
Line of credit																			$ 2,500,000,000										$ 950,000,000								$ 875,000,000
Credit facility, maximum borrowing capacity																											1,550,000,000					1,250,000,000				375,000,000
Debt instrument payment terms																																																																										The principal amount of the term loan is required to be repaid in two equal installments in July 2017 and July 2018. The senior secured facilities bear interest for the first six months after closing at LIBOR or HIBOR plus a margin of 2.50% and thereafter will be subject to LIBOR or HIBOR plus a margin of between 1.75% to 2.50% based on Wynn Macau’s leverage ratio.
Maturity period																																																																																2017-07									2018-07
Interest rate																					2.50%	1.75%	2.50%										0.75%	1.75%																																				1.25%	1.25%												1.75%	1.75%	2.50%	2.50%				1.75%	1.75%	2.50%	2.50%					2.50%	1.75%	2.50%
Fee required for unborrowed amounts, percentage per annum																			0.61%											0.30%
Maximum consolidated senior secured net leverage ratio																														2.75
Minimum consolidated EBITDA																														200,000,000.0
Deferred financing cost and third party fees			(9,569,000)	(40,435,000)	(25,151,000)													17,700,000																																																																														(101,200,000)
Deferred financing costs, net			84,413,000	67,926,000														33,200,000													23,400,000
Letter of credit outstanding				8,900,000																															8,900,000
Consolidated leverage ratio excess cash flow percentage																				50.00%
Consolidated leverage ratio, minimum																				4.0
Leverage ratio, maximum																				4.50
Interest coverage ratio, minimum																				2.00
Bank guarantee carrying amount																								37,000,000	300,000,000
Guarantee, period at fixed amount																								180 days	180 days
Maximum guarantee by Macau government																								300,000	2,300,000
Increase of credit facility																												200,000,000
Debt maturity date																																							Oct. 15, 2021	Oct. 15, 2021			May 01, 2020	May 01, 2020					Aug. 15, 2020	Aug. 15, 2020				Mar. 15, 2022	Mar. 15, 2022					May 30, 2023	May 30, 2023	Feb. 18, 2022				Feb. 18, 2022	Feb. 18, 2022	Feb. 18, 2022		Apr. 01, 2017	Apr. 01, 2017																Jul. 31, 2018	Jul. 31, 2018
Availability of credit facility																										1,420,000,000					1,240,000,000
Debt instrument, aggregate principal amount												600,000,000			750,000,000																														352,000,000						1,320,000,000					900,000,000		500,000,000				1,940,000,000.00	1,940,000,000.00			1,940,000,000	1,940,000,000			42,000,000	42,000,000	42,000,000
Debt instrument, interest rate			2.00%				7.875%																																5.25%	5.25%	7.875%	7.875%	7.875%	7.875%					7.75%	7.75%				5.375%	5.375%	5.375%		4.25%		4.25%	4.25%	2.00%	2.00%			2.00%	2.00%	2.00%
Net proceed from issuance of debt note			958,008,000	1,297,870,000	1,648,643,000								748,800,000
Debt redemption date																																																											Feb. 28, 2023	Feb. 28, 2023
Debt instrument, redemption terms																																						At any time on or before October 14, 2016, WML may redeem the 2021 Notes, in whole or in part, at a redemption price equal to the greater of (a) 100% of the aggregate principal amount of the 2021 Notes or (b) a “make-whole” amount as determined by an independent investment banker in accordance with the terms of the WML Indenture, in either case, plus accrued and unpaid interest.																				the Issuers satisfied and discharged the 2017 Indenture and, in November 2013		The Issuers may, at their option, redeem the 2023 Notes, in whole or in part, at any time or from time to time prior to their stated maturity. The redemption price for 2023 Notes that are redeemed before February 28, 2023 will be equal to the greater of (a) 100% of the principal amount of the 2023 Notes to be redeemed or (b) a “make-whole” amount described in the 2023 Indenture, plus in either case accrued and unpaid interest to, but not including, the redemption date.
Debt redemption price as percentage of principal						103.938%		100.00%																																							103.938%						103.875%	102.688%			100.00%			100.00%
Debt percentage of redemption premium on principal amount										0.00%	103.94%
Percentage of principal repayment on the event of change of control									101.00%								101.00%																										101.00%								101.00%			101.00%						101.00%
Repurchase amount, carrying value																																											5,000,000					93,400,000
Aggregate amount for certain event																50,000,000
Payment default classification period for interest payment														30 days																																														30 days
Debt premium decrease																																														0						0		0
Valid tenders received at time of cash tender offer expiration																																																																																															305,800,000		1,146,500,000
Principal amount for cash tender offer	1,000																																																																																													377,000,000		1,226,600,000
Redemption fees paid																																											500,000					9,100,000
Long-term debt previous due date																																											December 2014						December 2014
Debt instrument issuance date																																																												May 22, 2013
Capitalized financing costs																																																													4,100,000
Common stock redeemed, shares		24,549,222																																																												24,549,222	24,549,222
Interest payment due																																																																38,700,000	38,700,000
Principal payments on long-term debt			101,339,000	501,400,000	1,022,847,000																																																																31,500,000	350,000
Balloon payment due at maturity																																																																						28,000,000
Number of basis points of interest paid in addition to LIBOR																																																																									125
Fair value of debt instrument excluding the Redemption Note			5,400,000,000	4,800,000,000
Long-term debt excluding the Redemption Note			5,400,000,000	4,700,000,000
Future accretion of debt discounts			5,100,000																																																																								3,830,000	4,900,000	7,384,000	1,279,000	1,463,000
Debt Instrument First Installment Payment Date																																																																																	Jul. 31, 2017	Jul. 31, 2017
Future amortization of debt premiums			$ 5,100,000