Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- 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.

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Balance Type:	na
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- Definition

Number of stock bought back by the entity at the exercise price or redemption price.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

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- Definition

Amount to settle allegations surrounding the interest rate on the redemption note.

+ References

No definition available.

+ Details

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Namespace Prefix:	wynn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Name:	dei_LegalEntityAxis=wynn_AruzeUnitedStatesOfAmericaIncMember
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Long-Term Debt - Redemption Price Promissory Note (Details) - USD ($)			1 Months Ended	12 Months Ended
	Mar. 30, 2018	Feb. 18, 2012	Feb. 18, 2012	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Common shares redeemed and canceled (in shares)			24,549,222
Litigation settlement	$ 463,600,000			$ 0	$ 463,557,000	$ 0
Aruze USA, Inc.
Debt Instrument [Line Items]
Common shares redeemed and canceled (in shares)		24,549,222
Redemption price promissory note, principal amount		$ 1,940,000,000	$ 1,940,000,000
Debt instrument, interest rate		2.00%	2.00%