Benefit Plans - Defined Contribution Plan (Detail) (401(k) Plan, USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Contribution Plan Disclosure
Company's matching contribution percentage	50.00%	50.00%
Annual contributions per employee amount	$ 750	$ 500
Retirement savings plan contribution expense	2,000,000	1,200,000	0
Maximum
Defined Contribution Plan Disclosure
Employee contributions, percentage	6.00%	6.00%
Wynn Macau
Defined Contribution Plan Disclosure
Retirement savings plan contribution expense	$ 8,700,000	$ 7,500,000	$ 7,100,000
Employee contribution percentage	5.00%
Company's matching contribution percentage	10.00%
Vesting period	10 years

The amount of the cost recognized during the period for defined contribution plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

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

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Percentage employer matches of the employee's percentage contribution matched.

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Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

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Maximum amount the employee may contribute to a defined contribution plan.

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

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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