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Stockholders' Deficit (Details)	3 Months Ended												12 Months Ended
Stockholders' Deficit (Details)	Dec. 31, 2025 USD ($) $ / shares shares	Sep. 30, 2025 $ / shares $ / shares	Jun. 30, 2025 USD ($) $ / shares	Mar. 31, 2025 $ / shares	Dec. 31, 2024 $ / shares shares	Sep. 30, 2024 $ / shares $ / shares	Jun. 30, 2024 $ / shares $ / shares	Mar. 31, 2024 $ / shares	Dec. 31, 2023 $ / shares	Sep. 30, 2023 $ / shares	Jun. 30, 2023 $ / shares	Mar. 31, 2023 $ / shares	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)	Feb. 27, 2026 shares	Feb. 12, 2026 $ / shares	Jun. 30, 2025 $ / shares	Nov. 30, 2024 USD ($)	Nov. 01, 2024 USD ($)	Mar. 02, 2023 shares
Equity, Class of Treasury Stock
Authorized amount under repurchase program																				$ 1,000,000,000.0
Net cost for common stock purchased													$ 379,787,000	$ 405,281,000	$ 212,454,000
Dividend paid (in dollars per share) \| $ / shares	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25
Cash dividends													175,926,000	139,894,000	85,139,000
Decrease from distributions to noncontrolling interest													$ 25,672,000	$ 16,988,000	22,578,000
Common stock, shares authorized (in shares) \| shares	400,000,000				400,000,000								400,000,000	400,000,000
Common stock, shares issued (in shares) \| shares	134,326,464				133,584,126								134,326,464	133,584,126
Common stock, shares outstanding (in shares) \| shares	103,989,787				107,821,567								103,989,787	107,821,567
WML
Equity, Class of Treasury Stock
Company's share of dividend													$ 177,700,000	$ 72,100,000
Decrease from distributions to noncontrolling interest													71,300,000	28,800,000
WM Cayman I \| Goldman Sachs International \| Securities Lending Agreement
Equity, Class of Treasury Stock
Common stock, shares authorized (in shares) \| shares																					459,774,985
Subsidiaries \| WML
Equity, Class of Treasury Stock
Dividends payable (in dollars per share) \| $ / shares		$ 0.185				$ 0.075	$ 0.075											$ 0.185
Cash dividends													$ 249,000,000.0	100,900,000
Wynn Palace and Wynn Macau
Equity, Class of Treasury Stock
Percentage of ownership	72.00%												72.00%
Subsequent Event
Equity, Class of Treasury Stock
Dividends payable (in dollars per share) \| $ / shares																	$ 0.25
Subsequent Event \| WM Cayman I \| Goldman Sachs International \| Securities Lending Agreement
Equity, Class of Treasury Stock
Common stock, shares outstanding (in shares) \| shares																79,774,985
Accumulated deficit
Equity, Class of Treasury Stock
Cash dividends													$ 104,583,000	$ 111,115,000	$ 85,139,000
O 2025 A Dividends \| Accumulated deficit
Equity, Class of Treasury Stock
Cash dividends declared, recorded as reduction of retained earnings			$ 104,600,000
O 2024 A Dividends \| Accumulated deficit
Equity, Class of Treasury Stock
Cash dividends declared, recorded as reduction of retained earnings			111,100,000
O 2023 A Dividends \| Accumulated deficit
Equity, Class of Treasury Stock
Cash dividends declared, recorded as reduction of retained earnings			$ 85,100,000
April 2016 Equity Repurchase Program
Equity, Class of Treasury Stock
Stock repurchases (in shares) \| shares													4,365,212	4,349,779
Stock repurchases (in dollars per share) \| $ / shares													$ 82.06	$ 88.75
Net cost for common stock purchased													$ 358,200,000	$ 386,000,000.0
Repurchase authority remaining under the program	$ 454,900,000												$ 454,900,000
Stock Repurchase Program, Additional Authorized Amount																			$ 766,000,000.0