Summary of Results of Operations by Segment (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net revenues		$ 996,285	$ 1,370,010	$ 3,128,981	$ 4,295,686
Adjusted Property EBITDA	[1]	279,891	458,779	898,338	1,420,820
Other operating costs and expenses
Pre-opening costs		19,467	6,718	52,433	14,792
Depreciation and amortization		80,649	79,027	245,428	234,037
Property charges and other		987	1,640	3,963	13,674
Corporate expenses and other		16,806	27,883	59,286	83,682
Stock-based compensation expense		9,210	10,369	30,206	22,714
Equity in income (loss) from unconsolidated affiliates		(2)	567	68	1,173
Total		127,117	126,204	391,384	370,072
Operating income		152,774	332,575	506,954	1,050,748
Non-operating income and expenses
Interest income		1,465	5,814	4,655	16,072
Interest expense, net of amounts capitalized		(74,079)	(79,048)	(227,298)	(236,069)
Increase (decrease) in swap fair value		(1,287)	2,360	(7,010)	(1,451)
Decrease in Redemption Note fair value		13,720	0	13,720	0
Loss on extinguishment of debt		(5,971)	(3,573)	(126,004)	(7,356)
Equity in income (loss) from unconsolidated affiliates		(2)	567	68	1,173
Other		459	(801)	1,790	(405)
Total other non-operating costs and expenses		(65,695)	(74,681)	(340,079)	(228,036)
Income before income taxes		87,079	257,894	166,875	822,712
Benefit (provision) for income taxes		3,906	(4,888)	(12,589)	(8,261)
Net income		90,985	253,006	154,286	814,451
Macau Operations
Segment Reporting Information [Line Items]
Net revenues		585,116	942,255	1,907,425	3,035,588
Adjusted Property EBITDA	[1]	162,822	325,529	548,555	1,016,858
Las Vegas
Segment Reporting Information [Line Items]
Net revenues		411,169	427,755	1,221,556	1,260,098
Adjusted Property EBITDA	[1]	$ 117,069	$ 133,250	$ 349,783	$ 403,962

[1] "Adjusted Property EBITDA" is net income before interest, taxes, depreciation and amortization, pre-opening costs, property charges and other, management and license fees, corporate expenses and other, intercompany golf course and water rights leases, stock-based compensation, loss on extinguishment of debt, change in interest rate swap fair value, change in Redemption Note fair value and other non-operating income and expenses, and includes equity in income (loss) from unconsolidated affiliates. Adjusted Property EBITDA is presented exclusively as a supplemental disclosure because management believes that it is widely used to measure the performance, and as a basis for valuation, of gaming companies. Management uses Adjusted Property EBITDA as a measure of the operating performance of its segments and to compare the operating performance of its properties with those of its competitors. The Company also presents Adjusted Property EBITDA because it is used by some investors as a way to measure a company's ability to incur and service debt, make capital expenditures and meet working capital requirements. Gaming companies have historically reported EBITDA as a supplement to financial measures in accordance with U.S. GAAP. In order to view the operations of their casinos on a more stand-alone basis, gaming companies, including Wynn Resorts, Limited, have historically excluded from their EBITDA calculations pre-opening expenses, property charges, corporate expenses and stock-based compensation that do not relate to the management of specific casino properties. However, Adjusted Property EBITDA should not be considered as an alternative to operating income as an indicator of the Company's performance, as an alternative to cash flows from operating activities as a measure of liquidity, or as an alternative to any other measure determined in accordance with GAAP. Unlike measures of net income, Adjusted Property EBITDA does not include depreciation or interest expense and therefore does not reflect current or future capital expenditures or the cost of capital. The Company has significant uses of cash flows, including capital expenditures, interest payments, debt principal repayments, taxes and other non-recurring charges, which are not reflected in Adjusted Property EBITDA. Also, Wynn Resorts' calculation of Adjusted Property EBITDA may be different from the calculation methods used by other companies and, therefore, comparability may be limited.