Income Taxes - Additional Information (Detail) $ / shares in Units, MOP$ in Millions		12 Months Ended
	Nov. 30, 2010	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2018 MOP (MOP$)
Income Taxes
Complementary tax rate	12.00%
Amount of complementary tax exemption		$ 96,800,000	$ 63,000,000	$ 27,300,000
Amount of complementary tax exemption per share | $ / shares		$ 0.90	$ 0.61	$ 0.27
Annual complementary tax to be paid		$ 1,600,000	$ 1,600,000	$ 1,600,000	MOP$ 12.8
Provisional net tax benefit		390,900,000	339,900,000
Recognized foreign tax credit tax benefit net of valuation allowance		82,800,000	746,600,000	170,500,000
Increase (decrease) in valuation allowance for deferred tax assets		(746,600,000)	103,700,000
Tax benefits (loss) realized		2,000,000	2,600,000	800,000
FTC carryforwards expired		545,700,000
Foreign tax credit carryforwards		3,190,000,000
Disallowed interest carryforwards not subject to expiration		294,200,000
U.S. and foreign uncertain tax positions that increase NOL and foreign tax credit carryforward deferred tax assets		99,500,000	95,200,000	90,300,000
Uncertain tax positions, noncurrent		0	0	200,000
Unrecognized tax benefits that would impact the effective tax rate if recognized		31,000,000	26,900,000	22,600,000
Recognized interest and penalties			900,000	900,000
Decrease in unrecognized tax benefits due to expiration of the statute of limitations		4,692,000	3,807,000	3,721,000
Maximum
Income Taxes
Unrecognized tax benefit increase resulting in tax settlements		5,100,000
Tax Credit Carryforward Expiry In 2019
Income Taxes
Foreign tax credit carryforwards		110,900,000
Tax Credit Carryforward Expiry In 2020
Income Taxes
Foreign tax credit carryforwards		530,400,000
Tax Credit Carryforward Expiry In 2021
Income Taxes
Foreign tax credit carryforwards		540,300,000
Tax Credit Carryforward Expiry In 2023
Income Taxes
Foreign tax credit carryforwards		756,000,000
Tax Credit Carryforward Expiry In 2024
Income Taxes
Foreign tax credit carryforwards		710,700,000
Tax Credit Carryforward, Expires at 2025
Income Taxes
Foreign tax credit carryforwards		47,200,000
Tax Credit Carryforward, Expires at 2027
Income Taxes
Foreign tax credit carryforwards		492,400,000
Foreign Tax Credit
Income Taxes
Valuation allowance		2,490,000,000	3,270,000,000
Other Deferred Tax Asset
Income Taxes
Valuation allowance		5,300,000	3,500,000
Wynn Macau
Income Taxes
Decrease in unrecognized tax benefits due to expiration of the statute of limitations		$ 4,700,000	3,800,000	3,700,000
Foreign
Income Taxes
Gaming tax		35.00%
Tax loss carryforward		$ 340,000,000	319,100,000	$ 317,300,000
Valuation allowance		$ 143,872,000	117,175,000
U.S.
Income Taxes
Tax credit of "net" foreign source income		21.00%
Foreign tax credit carryforwards		$ 3,187,797,000	3,616,872,000
Tax loss carryforward		0
Valuation allowance		$ 2,500,027,000	$ 3,273,292,000
Retail Joint Venture
Income Taxes
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			49.90%