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Benefit Plans - Defined Contribution Plan (Detail) - United States - USD ($) $ in Millions		12 Months Ended
	Jul. 01, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan Disclosure
Company's matching contribution percentage		50.00%
Matching contribution expenses			$ 6.9	$ 6.4
Maximum
Defined Contribution Plan Disclosure
Employer matching contributions, percentage of eligible compensation		6.00%
Wynn Macau
Defined Contribution Plan Disclosure
Matching contribution expenses		$ 19.5	$ 17.8	$ 16.6
Wynn Macau | Wynn Macau Plan
Defined Contribution Plan Disclosure
Employee contribution percentage		5.00%
Wynn Macau | CPF System
Defined Contribution Plan Disclosure
Employer matching contributions, percentage of eligible compensation	5.00%
Minimum employee contribution percentage	5.00%
Annual vesting percentage	10.00%
Vesting period	10 years

X

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

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+ References

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

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- Definition

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+ References

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- Definition

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+ References

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

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- Definition

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- Definition

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