Amounts due to recorded owners or owners with a beneficial interest of more than 10 percent of the voting interests or officers of the company.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(4))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.17)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04.12(a)(1))
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996

+ Details

Name:	us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Consideration In Event Of Employee Agreement Termination

+ References

No definition available.

+ Details

Name:	wynn_ConsiderationInEventOfEmployeeAgreementTermination
Namespace Prefix:	wynn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of percentage points to be multiplied by each anniversary of the term of the employment agreement that has occurred used to determine discount on home purchase.

+ References

No definition available.

+ Details

Name:	wynn_NumberOfPercentagePointsUsedToDetermineDiscountOnHomePurchase
Namespace Prefix:	wynn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Total Costs To Date For Home And Renovations Made To The Home Purchased For An Employee.

+ References

No definition available.

+ Details

Name:	wynn_PurchaseAndRenovationCostsForHomePurchasedForEmployee
Namespace Prefix:	wynn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Related Party Transaction, Maximum Shares of Common Stock Permitted to Sell

+ References

No definition available.

+ Details

Name:	wynn_RelatedPartyTransactionMaximumSharesofCommonStockPermittedtoSell
Namespace Prefix:	wynn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_ChiefOperatingOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=wynn_RegistrationRightsAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=wynn_FormerBoardofDirectorsChairmanandChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions - Additional Information (Detail) - USD ($)		12 Months Ended
	Mar. 20, 2018	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction
Amount due to officers and directors			$ 400,000
Chief Operating Officer
Related Party Transaction
Purchase of home for director		$ 10,000,000
Number of percentage points used to determine discount on home purchase		10.00%
Consideration in event of employee agreement termination		$ 1
Registration Rights Agreement \| Former Board of Directors Chairman and Chief Executive Officer
Related Party Transaction
Maximum shares of common stock permitted to sell (in shares)	4,043,903