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Segment Information - Summary of Results of Operations by Segment (Detail) $ in Thousands		12 Months Ended
	Mar. 30, 2018 USD ($)	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information
Total operating revenues		$ 2,095,861	$ 6,611,099	$ 6,717,660
Adjusted Property EBITDA		(324,305)	1,815,408	2,044,413
Other operating expenses
Litigation settlement	$ 463,600	0	0	463,557
Pre-opening		6,506	102,009	53,490
Depreciation and amortization		725,502	624,878	550,596
Property charges and other		67,455	20,286	60,256
Corporate expenses and other		46,023	150,228	144,479
Stock-based compensation		62,254	39,702	36,491
Total other operating expenses		907,740	937,103	1,308,869
Operating income (loss)		(1,232,045)	878,305	735,544
Other non-operating income and expenses
Interest income		15,384	24,449	29,866
Interest expense, net of amounts capitalized		(556,474)	(414,030)	(381,849)
Change in derivatives fair value		(13,060)	(3,228)	(4,520)
Change in Redemption Note fair value		0	0	(69,331)
(Loss) gain on extinguishment of debt		(4,601)	(12,437)	104
Other		28,521	15,159	(4,074)
Other income (expense), net		(530,230)	(390,087)	(429,804)
Income (loss) before income taxes		(1,762,275)	488,218	305,740
(Provision) benefit for income taxes		(564,671)	(176,840)	497,344
Net income (loss)		(2,326,946)	311,378	803,084
Net income attributable to noncontrolling interest		(259,701)	188,393	230,654
Net income (loss) attributable to Wynn Resorts, Limited		(2,067,245)	122,985	572,430
Nonrecurring regulatory expense			35,000
Pre-opening expenses excluded from stock-based compensation			700	700
Property charges and other expenses excluded from stock-based compensation				2,200
Derivative Litigation | Positive Outcome of Litigation | General and Administrative Expense
Other non-operating income and expenses
Net gain related to derivative litigation settlement		30,200
Casino
Segment Reporting Information
Total operating revenues		1,237,230	4,573,924	4,784,990
Rooms
Segment Reporting Information
Total operating revenues		307,973	804,162	751,800
Food and Beverage
Segment Reporting Information
Total operating revenues		329,584	818,822	754,128
Entertainment, retail and other
Segment Reporting Information
Total operating revenues		$ 221,074	414,191	426,742
Macau Operations
Segment Reporting Information
Number of Reportable Segments | segment		1
Las Vegas Operations
Segment Reporting Information
Number of Reportable Segments | segment		1
Encore Boston Harbor
Segment Reporting Information
Number of Reportable Segments | segment		1
Operating Segments | Macau Operations
Segment Reporting Information
Total operating revenues		$ 980,077	4,613,723	5,052,091
Adjusted Property EBITDA		(236,836)	1,378,372	1,577,140
Operating Segments | Las Vegas Operations
Segment Reporting Information
Total operating revenues		747,947	1,633,457	1,665,569
Adjusted Property EBITDA		(56,356)	413,886	467,273
Operating Segments | Las Vegas Operations | Casino
Segment Reporting Information
Total operating revenues		236,826	394,104	434,083
Operating Segments | Las Vegas Operations | Rooms
Segment Reporting Information
Total operating revenues		202,073	483,055	468,238
Operating Segments | Las Vegas Operations | Food and Beverage
Segment Reporting Information
Total operating revenues		216,426	558,782	567,121
Operating Segments | Las Vegas Operations | Entertainment, retail and other
Segment Reporting Information
Total operating revenues		92,622	197,516	196,127
Operating Segments | Encore Boston Harbor
Segment Reporting Information
Total operating revenues		361,666	363,919	0
Adjusted Property EBITDA		(23,762)	23,150	0
Operating Segments | Encore Boston Harbor | Casino
Segment Reporting Information
Total operating revenues		287,525	243,855	0
Operating Segments | Encore Boston Harbor | Rooms
Segment Reporting Information
Total operating revenues		20,679	36,144	0
Operating Segments | Encore Boston Harbor | Food and Beverage
Segment Reporting Information
Total operating revenues		36,866	61,088	0
Operating Segments | Encore Boston Harbor | Entertainment, retail and other
Segment Reporting Information
Total operating revenues		16,596	22,832	0
Operating Segments | Wynn Palace | Macau Operations
Segment Reporting Information
Total operating revenues		505,420	2,543,694	2,757,566
Adjusted Property EBITDA		(149,647)	729,535	843,902
Operating Segments | Wynn Palace | Macau Operations | Casino
Segment Reporting Information
Total operating revenues		368,284	2,139,756	2,356,022
Operating Segments | Wynn Palace | Macau Operations | Rooms
Segment Reporting Information
Total operating revenues		46,110	174,576	170,067
Operating Segments | Wynn Palace | Macau Operations | Food and Beverage
Segment Reporting Information
Total operating revenues		43,198	117,376	110,638
Operating Segments | Wynn Palace | Macau Operations | Entertainment, retail and other
Segment Reporting Information
Total operating revenues		47,828	111,986	120,839
Operating Segments | Wynn Macau | Macau Operations
Segment Reporting Information
Total operating revenues		474,657	2,070,029	2,294,525
Adjusted Property EBITDA		(87,189)	648,837	733,238
Operating Segments | Wynn Macau | Macau Operations | Casino
Segment Reporting Information
Total operating revenues		344,595	1,796,209	1,994,885
Operating Segments | Wynn Macau | Macau Operations | Rooms
Segment Reporting Information
Total operating revenues		39,111	110,387	113,495
Operating Segments | Wynn Macau | Macau Operations | Food and Beverage
Segment Reporting Information
Total operating revenues		33,094	81,576	76,369
Operating Segments | Wynn Macau | Macau Operations | Entertainment, retail and other
Segment Reporting Information
Total operating revenues		57,857	81,857	109,776
Corporate and other
Segment Reporting Information
Total operating revenues		6,171	0	0
Adjusted Property EBITDA		(7,351)	0	0
Corporate and other | Entertainment, retail and other
Segment Reporting Information
Total operating revenues		$ 6,171	$ 0	$ 0

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