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Earnings Per Share - Schedule of Shares used in Calculation of Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Numerator:    
Net income attributable to Wynn Resorts, Limited - basic $ 144,216 $ 12,332
Assumed conversion of WML Convertible Bonds 0 (14,566)
Net income (loss) attributable to Wynn Resorts, Limited - diluted $ 144,216 $ (2,234)
Denominator:    
Weighted average common shares outstanding (shares) 111,023 112,753
Potential dilutive effect of stock options and restricted stock (shares) 310 363
Weighted average common and common equivalent shares outstanding (shares) 111,333 113,116
Net income (loss) attributable to Wynn Resorts, Limited per common share, basic (in usd per share) $ 1.30 $ 0.11
Net income attributable to Wynn Resorts, Ltd. per common share, diluted (in usd per share) $ 1.30 $ (0.02)
Antidilutive securities excluded from computation of earnings per share (shares) 281 38