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Stockholders' Deficit (Details)		3 Months Ended				6 Months Ended
Stockholders' Deficit (Details)	Jun. 16, 2026 USD ($)	Jun. 30, 2026 USD ($) $ / shares shares	Mar. 31, 2026 USD ($) $ / shares	Jun. 30, 2025 USD ($) $ / shares shares	Mar. 31, 2025 USD ($) $ / shares	Jun. 30, 2026 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) $ / shares shares	Aug. 06, 2026 shares	Aug. 04, 2026 $ / shares	Jun. 16, 2026 $ / shares	Dec. 31, 2025 shares	Nov. 01, 2024 USD ($)	Mar. 31, 2023	Mar. 02, 2023 shares
Subsidiary, Sale of Stock [Line Items]
Stock repurchase program, authorized amount												$ 1,000,000,000.00
Shares repurchased by the Company and held as treasury shares		$ 90,735,000		$ 163,504,000		$ 162,769,000	$ 377,031,000
Cash dividend paid (usd per share) \| $ / shares		$ 0.25	$ 0.25	$ 0.25	$ 0.25
Cash dividends declared		$ 68,869,000		$ 61,611,000		$ 94,939,000	88,199,000
Common stock, authorized (in shares) \| shares		400,000,000				400,000,000					400,000,000
Common stock, outstanding (in shares) \| shares		103,405,133				103,405,133					103,989,787
Distribution to noncontrolling interests		$ 7,600,000		6,000,000.0		$ 15,918,000	12,324,000
Decrease from distributions to noncontrolling interest		7,585,000		6,038,000		15,918,000	12,324,000
WML
Subsidiary, Sale of Stock [Line Items]
Proceeds from Dividends Received	$ 106,700,000
Decrease from distributions to noncontrolling interest	43,100,000
Wynn Palace and Wynn Macau
Subsidiary, Sale of Stock [Line Items]
Percentage of ownership													72.00%
WM Cayman I \| Goldman Sachs International \| Securities Lending Agreement
Subsidiary, Sale of Stock [Line Items]
Common stock, authorized (in shares) \| shares														459,774,985
Subsidiaries \| WML
Subsidiary, Sale of Stock [Line Items]
Dividends payable (usd per share) \| $ / shares										$ 0.223
Dividends, Cash	$ 149,800,000
Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Dividends payable (usd per share) \| $ / shares									$ 0.25
Subsequent Event \| WM Cayman I \| Goldman Sachs International \| Securities Lending Agreement
Subsidiary, Sale of Stock [Line Items]
Common stock, outstanding (in shares) \| shares								79,774,985
Accumulated deficit
Subsidiary, Sale of Stock [Line Items]
Cash dividends declared		25,818,000		26,077,000		$ 51,890,000	$ 52,665,000
O 2026 Q1 Dividends \| Accumulated deficit
Subsidiary, Sale of Stock [Line Items]
Cash dividends declared			$ 26,100,000
O 2025 Q1 Dividends \| Accumulated deficit
Subsidiary, Sale of Stock [Line Items]
Cash dividends declared					$ 26,600,000
O 2025 Q2 Dividends \| Accumulated deficit
Subsidiary, Sale of Stock [Line Items]
Cash dividends declared				$ 26,100,000
O 2026 Q2 Dividends \| Accumulated deficit
Subsidiary, Sale of Stock [Line Items]
Cash dividends declared		$ 25,800,000
April 2016 Equity Repurchase Program
Subsidiary, Sale of Stock [Line Items]
Treasury stock, acquired (in shares) \| shares		741,098		2,004,418		1,269,765	4,364,612
Treasury stock acquired (usd per share) \| $ / shares		$ 101.20		$ 78.88		$ 101.42	$ 82.06
Shares repurchased by the Company and held as treasury shares		$ 75,000,000.0		$ 158,100,000		$ 128,800,000	$ 358,100,000
Remaining authorized repurchase amount		$ 326,100,000				$ 326,100,000