Condensed Statements of Income (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating revenues:
Net revenues	$ 1,137,975	$ 1,370,010	$ 1,412,063	$ 1,513,613	$ 1,519,897	$ 1,390,112	$ 1,332,273	$ 1,378,654	$ 5,433,661	$ 5,620,936	$ 5,154,284
Operating costs and expenses:
General and administrative									492,464	448,788	441,699
Depreciation and amortization									314,119	371,051	373,199
Property charges and other									10,437	17,138	39,978
Total operating costs and expenses									4,167,383	4,330,845	4,125,008
Operating income	215,530	332,575	341,342	376,831	368,441	313,978	274,024	333,648	1,266,278	1,290,091	1,029,276
Other income (expense):
Interest and other income									20,441	15,713	12,543
Interest expense, net of amounts capitalized									(315,062)	(299,022)	(288,759)
Equity in income of subsidiaries									1,349	1,085	1,086
Other income (expense), net									(307,416)	(303,568)	(296,278)
Income before income taxes									958,862	986,523	732,998
Benefit (provision) for income taxes									3,782	17,634	(4,299)
Net income	148,193	253,006	258,402	303,043	290,486	248,811	192,716	272,144	962,644	1,004,157	728,699
Less: Net income attributable to noncontrolling interests.									(231,090)	(275,505)	(226,663)
Net income attributable to Wynn Resorts, Limited	109,346	191,406	203,906	226,896	213,884	182,020	129,785	202,963	731,554	728,652	502,036
Net income:
Basic (in usd per share)	$ 1.08	$ 1.90	$ 2.02	$ 2.25	$ 2.12	$ 1.81	$ 1.29	$ 2.02	$ 7.25	$ 7.25	$ 4.87
Diluted (in usd per share)	$ 1.07	$ 1.88	$ 2.00	$ 2.22	$ 2.10	$ 1.79	$ 1.28	$ 2.00	$ 7.18	$ 7.17	$ 4.82
Weighted average common shares outstanding:
Basic (in shares)									100,927	100,540	103,092
Diluted (in shares)									101,931	101,641	104,249
Wynn Resorts, Ltd
Operating revenues:
Other revenues									2,050	0	0
Net revenues									174,669	184,644	169,419
Operating costs and expenses:
General and administrative									45,934	45,285	70,602
Depreciation and amortization									447	423	421
Property charges and other									0	0	33
Total operating costs and expenses									46,381	45,708	71,056
Operating income									128,288	138,936	98,363
Other income (expense):
Interest and other income									1,997	1,486	1,116
Interest expense, net of amounts capitalized									(38,729)	(38,715)	(33,650)
Equity in income of subsidiaries									864,156	882,760	665,127
Other income (expense), net									827,424	845,531	632,593
Income before income taxes									955,712	984,467	730,956
Benefit (provision) for income taxes									6,932	19,690	(2,257)
Net income									962,644	1,004,157	728,699
Less: Net income attributable to noncontrolling interests.									231,090	275,505	226,663
Net income attributable to Wynn Resorts, Limited									731,554	728,652	502,036
Net income:
Basic (in usd per share)									$ 7.25	$ 7.25	$ 4.87
Diluted (in usd per share)									$ 7.18	$ 7.17	$ 4.82
Weighted average common shares outstanding:
Basic (in shares)									100,927	100,540	103,092
Diluted (in shares)									101,931	101,641	104,249
Wynn Resorts, Ltd | Wynn Macau
Operating revenues:
Wynn Las Vegas management fees									148,039	160,923	147,101
Wynn Resorts, Ltd | Wynn Las Vegas
Operating revenues:
Wynn Las Vegas management fees									$ 24,580	$ 23,721	$ 22,318