Accounting Policies [Abstract] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] As Previously Reported Scenario, Previously Reported [Member] Adoption of ASC 606 Restatement Adjustment [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] [Line Items] for Revenue, Initial Application Period Cumulative Effect Transition [Table] Gross revenues Gross Revenue Aggregate revenue earned from hotel, casino, food and beverage, entertainment, retail, and other operations. This amount includes the retail value of complimentary provided on a routine basis as part of our normal day to day operations. Promotional allowances Promotional Allowances Total operating revenues Revenue, Net Total operating expenses Costs and Expenses Operating income (loss) Operating Income (Loss) Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] Cash Cash Cash equivalents Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR or HIBOR LIBOR or HIBOR [Member] LIBOR or HIBOR [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Wynn Macau Wynn Macau [Member] Wynn Macau [Member] Wynn Macau, Limited Wynn Macau, Limited [Member] Wynn Macau, Limited [Member] Wynn America Wynn America [Member] Wynn America [Member] Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp [Member] Wynn Las Vegas, LLC and Wynn Las Vegas Capital Corp Aruze United States Of America Inc Aruze United States Of America Inc [Member] Aruze United States Of America Inc [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Term Loan Facility, due 2021 Senior Term Loan Facility, Due September 2021 [Member] Senior Term Loan Facility, Due September 2021 [Member] Senior Revolving Credit Facility, due 2020 Senior Revolving Credit Facility, Due September 2020 [Domain] Senior Revolving Credit Facility, Due September 2020 [Domain] 5 1/4% Wynn Macau Limited Senior Notes Due October 15, 2021 Five And One Over Four Percentage Wynn Macau Senior Notes Due October Fifteen Two Thousand Twenty One [Member] Five And One Over Four Percentage Wynn Macau Senior Notes Due October Fifteen Two Thousand Twenty One [Member] 4 7/8% Senior Notes, due 2024 Four and Seven Over Eight Percentage Wynn Macau Limited Senior Notes Due October One Two Thousand Twenty Four [Member] Four and Seven Over Eight Percentage Wynn Macau Limited Senior Notes Due October One Two Thousand Twenty Four [Member] 5 1/2% Senior Notes, due 2027 Five And One Over Two Percentage Wynn Macau Limited Senior Notes Due October One Two Thousand Twenty Seven [Member] Five And One Over Two Percentage Wynn Macau Limited Senior Notes Due October One Two Thousand Twenty Seven [Member] WML Finance Credit Facility, due 2018 WML Finance Credit Facility [Domain] WML Finance Credit Facility [Domain] Senior Term Loan Facility, Various Maturities Senior Term Loan Facility, Variable Rate, Various Maturities [Member] Senior Term Loan Facility, Variable Rate, Various Maturities [Member] 4 1/4% Senior Notes, due 2023 Four And One Over Four Percentage Wynn Las Vegas Senior Notes Due May Thirty Two Thousand Twenty Three [Member] Four And One Over Four Percentage Wynn Las Vegas Senior Notes Due May Thirty Two Thousand Twenty Three [Member] 5 1/2% Senior Notes, due 2025 Five and One Half Percent Senior Notes Due March One Twenty Twenty Five [Member] Five and One Half Percent Senior Notes Due March One Twenty Twenty Five [Member] 5 1/4% Senior Notes, due 2027 5.14% Senior Notes, Due May 15, 2027 [Member] 5.14% Senior Notes, Due May 15, 2027 [Member] Redemption Note Redemption Price Promissory Note With Former Stockholder And Related Party Due February Eighteen Two Thousand Twenty Two [Member] Redemption Price Promissory Note with Former Stockholder And Related Party, Due February Eighteen, Two Thousand Twenty Two [Member] 5 3/8% First Mortgage Notes, Due March 15, 2022 Five And Three Over Eight Percentage Wynn Las Vegas First Mortgage Notes Due March Fifteen Two Thousand Twenty Two [Member] Five And Three Over Eight Percentage Wynn Las Vegas First Mortgage Notes Due March Fifteen Two Thousand Twenty Two [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Debt Secured Debt [Member] Senior Secured Revolving Credit Facility Revolving Credit Facility [Member] Senior Notes Senior Notes [Member] Promissory Notes Notes Payable, Other Payables [Member] Mortgages Mortgages [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Unamortized debt issuance cost and original issuance discount Unamortized debt issuance and original issuance discount (premium) Unamortized debt issuance costs and original issuance discount or premium Interest in addition to LIBOR Debt Instrument, Basis Spread on Variable Rate Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Long-term debt due date Debt Instrument, Maturity Date Interest rate during period Debt Instrument, Interest Rate During Period Change in Redemption Note fair value Fair Value Adjustment of Debt Fair Value Adjustment of Debt Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization Consolidation And Presentation Of Financial Statements Disclosure [Table] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Wynn Macau Wynn Palace Wynn Palace [Member] Wynn Palace [Member] Las Vegas Wynn Las Vegas [Member] Wynn Las Vegas [Member] Wynn Retail Wynn Retail [Member] Wynn Retail [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Casino Casino [Member] Casino [Member] Meeting and convention Inperson Committee Meeting [Member] In-person Committee Meeting [Member] Retail Retail [Member] Retail [Member] Food and beverage Food And Beverage [Member] Food And Beverage [Member] Theaters Showrooms [Member] Showrooms [Member] Nightclubs Nightclubs [Member] Nightclubs [Member] Organization and Basis of Presentation [Line Items] Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] Percentage of ownership Noncontrolling Interest, Ownership Percentage by Parent Number of hotel Number Of Hotel Towers Number of Hotel Towers Number of rooms in hotel Number Of Rooms In Hotel Number Of Rooms In Hotel Area of property Functional Area Square Footage Functional Area Square Footage. Number of restaurants Number of Restaurants Number of facilities Number Of Facilities Number of Facilities Number of outlets Number Of Food And Beverage Outlets Number Of Food And Beverage Outlets. Number of showrooms Number Of Showrooms Number of Showrooms. Area of property, currently under construction Functional Area Square Footage Under Construction Functional Area Square Footage Under Construction Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Summary of Total Compensation Cost Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Stockholders' Equity Note [Abstract] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Equity Offering Public Stock Offering [Member] Public Stock Offering [Member] Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Newly issued shares sold in registered public offering (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Price per share (usd per share) Sale of Stock, Price Per Share Net proceeds Sale of Stock, Consideration Received on Transaction Noncontrolling Interest [Table] Noncontrolling Interest [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Consolidated Entities [Axis] Consolidated Entities [Axis] Entity or group of entities consolidated into reporting entity. Consolidated Entities [Domain] Consolidated Entities [Domain] [Domain] for Consolidated Entities [Axis] Subsidiaries Subsidiaries [Member] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Cash dividend paid (usd per share) Common Stock, Dividends, Per Share, Cash Paid Dividends Dividends Dividends declared per common share (usd per share) Common Stock, Dividends, Per Share, Declared Proceeds from dividends received Proceeds from Dividends Received Decrease from distributions to noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Investments, Debt and Equity Securities [Abstract] Due in one year or less Available For Sale Securities Debt Maturities Within One Year Of Balance Sheet Date Fair Value Amount of available-for-sale debt securities at fair value maturing within one year of the balance sheet date. Due after one year through two years Available For Sale Securities Debt Maturities After One Through Two Years Fair Value Available for Sale Securities, Debt Maturities, after One Through Two Years of Balance Sheet Date, Fair Value Due after two years through three years Available For Sale Securities Debt Maturities After Two Through Three Years Fair Value Available For Sale Securities Debt Maturities After Two Through Three Years Fair Value Fair value Available-for-sale Securities, Debt Securities Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Deferred income taxes Deferred Income Tax Expense (Benefit) Stock-based compensation expense Allocated Share-based Compensation Expense Amortization of debt issuance costs Amortization of Debt Issuance Costs Losses On Extinguishment Of Debt Losses On Extinguishment Of Debt Amount represents (1) the difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity and/or (2) the write-off of amounts capitalized as deferred financing costs associated with the extinguishment prior to maturity. (Benefit) provision for doubtful accounts Provision for Doubtful Accounts Change in interest rate swap fair value Unrealized Gain (Loss) on Derivatives Change in Redemption Note fair value Property charges and other Property Charges and Other The expense charged against earnings to eliminate the capitalized cost of projects that have been terminated during the reporting period and other operating expenses, which are added back to net income when calculating cash provided by (used in) operations using the indirect method. Increase (decrease) in cash from changes in: Increase (Decrease) in Operating Capital [Abstract] Receivables, net Increase (Decrease) in Receivables Inventories and prepaid expenses and other Increase Decrease In Inventories Prepaid Expenses And Other Current Assets The net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities, the net change during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods and the net change during the reporting period in other operating assets not otherwise defined in the taxonomy. Customer deposits Increase (Decrease) in Customer Deposits Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures, net of construction payables and retention Payments to Acquire Property, Plant, and Equipment Purchase of investment securities Payments to Acquire Available-for-sale Securities, Debt Proceeds from sale or maturity of investment securities Proceeds from Sale and Maturity of Marketable Securities Purchase of intangible assets and other assets Payments for (Proceeds from) Other Investing Activities Proceeds from sale of assets Proceeds from Sale of Productive Assets Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Dividends paid Payments of Dividends Proceeds from note receivable from sale of ownership interest in subsidiary Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt Repayments of long-term debt Repayments of Long-term Debt Repurchase of common stock Payments for Repurchase of Common Stock Payments for financing costs Payments of Debt Issuance Costs Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash and Cash Equivalents Cash, cash equivalents and restricted cash: Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] Decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Balance, beginning of period Balance, end of period Supplemental cash flow disclosures: Supplemental Cash Flow Information [Abstract] Cash paid for interest, net of amounts capitalized Interest Paid, Net Stock-based compensation capitalized into construction Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Liability settled with shares of common stock Stock Issued Change in accounts and construction payables related to property and equipment Change In Property And Equipment Included In Accounts And Construction Payables Change in Property and Equipment Included in Accounts and Construction Payables Change in dividends payable on unvested restricted stock included in other accrued liabilities Change in dividends payable on unvested restricted stock included in accrued liabilities Change in dividends payable on unvested restricted stock included in accrued liabilities Dividends payable to noncontrolling interests Dividends payable to noncontrolling interests Dividends payable to noncontrolling interests Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Performance Shares Performance Shares [Member] Rooms Rooms [Member] Rooms [Member] Entertainment, retail and other Entertainment Retail And Other [Member] Entertainment Retail And Other [Member] General and administrative General And Administrative [Member] General And Administrative [Member] Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Total stock-based compensation capitalized Total stock-based compensation costs Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation costs Statement of Comprehensive Income [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract] Foreign currency translation adjustments, before and after tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Change in net unrealized loss on investment securities, before and after tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Redemption Note credit risk adjustment, net of tax of $2,735 Redemption Note settlement credit risk adjustment Redemption Note settlement credit risk adjustment Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to Wynn Resorts, Limited Comprehensive Income (Loss), Net of Tax, Attributable to Parent Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies [Table] Commitments And Contingencies [Table] Commitments and Contingencies [Table] Construction Performance Bond [Member] Construction Performance Bond [Member] Construction Performance Bond [Member] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending Litigation Pending Litigation [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Derivative Claims Derivative Claims [Member] Derivative Claims [Member] Contract Termination [Axis] Contract Termination [Axis] Contract Termination [Axis] Contract Termination [Domain] Contract Termination [Domain] Contract Termination [Domain] Wynn MA, LLC [Member] Wynn MA, LLC [Member] Wynn MA, LLC [Member] Redemption Price Promissory Note with former stockholder and related party, due February 18, 2022; interest at 2% Commitments and Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Guaranteed maximum price of contract Guaranteed Maximum Construction Price Guaranteed maximum construction price Wynn Boston Harbor Performance Bond Performance Bond Performance Bond Common stock redeemed, shares Stock Redeemed or Called During Period, Shares Redemption price promissory note, principal amount Debt Instrument, Face Amount Litigation Settlement LitigationSettlement_PromissoryNote Amount to settle allegations surrounding the interest rate on the redemption note. Released accrued interest held in escrow Released accrued interest held in escrow Released accrued interest held in escrow Interest payment due Interest Expense, Long-term Debt Number of derivative actions commenced in the U.S. District Court Loss Contingency, New Claims Filed, Number Organization and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Revenue Recognition [Abstract] Revenue Recognition [Text Block] Revenue Recognition [Text Block] Revenue Recognition [Text Block] Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Registration Rights Agreement [Member] Registration Rights Agreement [Member] Registration Rights Agreement [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Former Board of Directors Chairman and Chief Executive Officer Former Board of Directors Chairman and Chief Executive Officer [Member] Former Board of Directors Chairman and Chief Executive Officer [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Maximum shares of common stock permitted to sell per quarter without prior written consent Related Party Transaction, Maximum Shares of Common Stock Permitted to Sell Related Party Transaction, Maximum Shares of Common Stock Permitted to Sell Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Property, Plant and Equipment [Abstract] Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Bridge Facility Bridge Facility [Member] Bridge Facility [Member] Senior Term Loan Facility, due 2021 Senior Term Loan Facility, Due 2021 [Member] Senior Term Loan Facility, Due 2021 [Member] Senior Revolving Credit Facility, due 2021 WA Senior Revolving Credit Facility Due December 2021 [Member] WA Senior Revolving Credit Facility Due December 2021 [Member] Redemption Price Promissory Note, due 2022 Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Bridge Loan Bridge Loan [Member] Long-term debt, gross Long-term Debt, Gross Less: Unamortized debt issuance costs and original issue discounts and premium, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Less: Redemption Note fair value adjustment Fair Value Adjustment for Redemption Note Fair Value Adjustment for Redemption Note Long-term debt total Long-term Debt Current portion of long-term debt Long-term Debt, Current Maturities Total long-term debt, net of current portion Long-term Debt, Excluding Current Maturities Principles of Consolidation Consolidation, Policy [Policy Text Block] Cash and cash equivalents and restricted cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Investment Securities Marketable Securities, Policy [Policy Text Block] Accounts Receivable and Credit Risk Receivables, Policy [Policy Text Block] Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Redemption Price Promissory Note Redemption Price Promissory Note Policy [Policy Text Block] Redemption Price Promissory Note [Policy Text Block] Revenue Recognition and Promotional Allowances Revenue Recognition, Policy [Policy Text Block] Gaming Taxes Gaming Taxes Policy [Policy Text Block] Gaming Taxes Policy Comprehensive Income Comprehensive Income, Policy [Policy Text Block] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Recently Issued and Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Numerator: Net Income (Loss) Available Common Stockholders, Basic And Diluted [Abstract] Net Income (Loss) Available Common Stockholders, Basic And Diluted [Abstract] Net income (loss) attributable to Wynn Resorts, Limited Net Income (Loss) Attributable to Parent Denominator: Weighted Average Number Of Shares Outstanding, Basic And Diluted [Abstract] Weighted Average Number Of Shares Outstanding, Basic And Diluted [Abstract] Weighted average common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Basic Potential dilutive effect of stock options and restricted stock (shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average common and common equivalent shares outstanding (shares) Weighted Average Number of Shares Outstanding, Diluted Earnings Per Share, Basic Earnings Per Share, Basic Net income attributable to Wynn Resorts, Ltd. per common share, diluted (in dollars per share) Earnings Per Share, Diluted Antidilutive securities excluded from computation of earnings per share (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Legal Entity of Counterparty, Type Legal Entity of Counterparty, Type [Axis] Legal Entity Type of Counterparty [Domain] Legal Entity Type of Counterparty [Domain] Hotel Hotel [Member] Other Retail Leases And Other [Member] Retail Leases And Other [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Receivables, gross Accounts Receivable, Gross, Current Less: allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Receivables, net Receivables, Net, Current Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Statement of Financial Position [Abstract] Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, shares Treasury Stock, Shares Schedule of Investment Securities Available-for-sale Securities [Table Text Block] Investments by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Macau MACAU Other Macau Other Macau [Member] Other Macau [Member] Las Vegas Operations Encore Boston Harbor Wynn Boston Harbor [Member] Wynn Boston Harbor [Member] Corporate and other Corporate and Other [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Assets Assets Summary of Operations by Segment Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Summary of Assets by Segment Reconciliation of Assets from Segment to Consolidated [Table Text Block] Number of reportable segments Number of Reportable Segments Buildings and improvements Land Land and improvements Buildings and Improvements, Gross Furniture, fixtures and equipment Flight Equipment, Gross Leasehold interests in land Furniture and Fixtures, Gross Airplanes Leasehold Interest In Land Gross Leasehold interest in land, gross Construction in progress Construction in Progress, Gross Property and equipment, gross Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net Schedule of Capital Leased Assets [Table] Schedule of Capital Leased Assets [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Land Subject to Ground Lease Assets Leased to Others [Member] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Capital Leased Assets [Line Items] Capital Leased Assets [Line Items] Acres of land acquired Area Of Land, Acquired Area Of Land, Acquired Payments to acquire land Payments to Acquire Land Ground lease payments due 2019 Contractual Obligation, Due in Next Fiscal Year Ground lease payments due 2020 Contractual Obligation, Due in Second Year Ground lease payments due 2021 Contractual Obligation, Due in Third Year Ground lease payments due 2022 Contractual Obligation, Due in Fourth Year Ground lease payments due 2023 Contractual Obligation, Due in Fifth Year Ground lease payments due thereafter Contractual Obligation, Due after Fifth Year Maximum annual ground lease payments from 2068 through 2097 Contractual Obligation, Periodic Increase, Maximum Annual Payment Due Contractual Obligation, Periodic Increase, Maximum Annual Payment Due Finite-lived Intangible Assets Acquired Finite-lived Intangible Assets Acquired Benefit (provision) for income taxes Income Tax Expense (Benefit) Tax exemption period Tax Exemption Period Tax Exemption Period Payment exempt Amount Of Complementary Tax Exemption Amount of complementary tax exemption Annual complementary tax obligation Annual Complementary Tax Obligation Annual Complementary Tax Obligation Provisional net tax benefit Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit) Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Subsidiary Issuer Subsidiary Issuer [Member] Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Base Rate Base Rate [Member] Wynn America Credit Facilities Wynn America Credit Facilities [Member] Wynn America Credit Facilities [Member] WA Senior Term Loan Facility II WA Senior Term Loan Facility II [Member] WA Senior Term Loan Facility II [Member] 5 1/4% Senior Notes, Due May 15, 2027 Five and One Half Percent Senior Notes Due March One Twenty Twenty Five [Member] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Margin to stated interest rate Margin owed for cash collateral Margin owed for cash collateral Borrowings under credit facility Long-term Line of Credit Term loan, duration Debt Instrument, Term Basis spread on variable rate Redemption of principal amount of debt Early Repayment of Senior Debt Debt instrument, face amount Letters of credit outstanding Letters of Credit Outstanding, Amount Principal amount purchased Debt Instrument, Repurchased Face Amount Amount paid to execute indenture Debt Instrument, Amount Paid to Execute Indenture Debt Instrument, Amount Paid to Execute Indenture Fair value, excluding the redemption note Debt Instrument, Fair Value, Excluding The Redemption Note Debt Instrument, Fair Value, Excluding The Redemption Note Long-term debt excluding Redemption Note, debt issuance cost, original issue discount and premium Long Term Debt Excluding Redemption Note, debt issuance cost, original issue discount and premium Long Term Debt Excluding Redemption Note, debt issuance cost, original issue discount and premium Summary of Long-Term Debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Disaggregation of Revenues [Table text block] Schedule of Disaggregation of Revenues and Contract Liabilities [Table Text Block] [Table Text Block] for Schedule of Disaggregation of Revenues and Contract Liabilities [Table] Long-Term Debt Long-term Debt [Text Block] Equity Method Investments and Joint Ventures [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Retail Joint Venture Retail Joint Venture [Member] Retail Joint Venture [Member] New Joint Venture Corporate Joint Venture [Member] Schedule of Variable Interest Entities [Line Items] Schedule of Equity Method Investments [Line Items] Net book value of assets and liabilities transferred for joint venture Net Book Value Of Assets And Liabilities Transferred For Joint Venture The net book value of assets and liabilities associated with exiting Wynn Las Vegas retail stores transferred to the Retail Joint Venture. Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Joint venture, cash consideration received Joint Venture, Cash Consideration Received The cash consideration received for the ownership interest sold in the Retail Joint Venture. Joint venture note receivable Joint Venture Note Receivable Note receivable for the remaining consideration received for the ownership interest sold in the Retail Joint Venture. Present value of note present value of note Present value of interest-free note from Crown that matures on January 3, 2018. Assets Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Major Types of Debt and Equity Securities Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Domestic and foreign corporate bonds Domestic And Foreign Corporate Bonds [Member] Domestic And Foreign Corporate Bonds [Member] Measurement Frequency Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Market Prices in Active Markets (Level 1) Fair Value, Inputs, Level 1 [Member] Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Available-for-sale securities Available-for-sale Securities Liabilities: Liabilities, Fair Value Disclosure [Abstract] Redemption Note Debt Instrument, Fair Value Disclosure Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Total Wynn Resorts, Ltd. stockholders' equity Parent [Member] Common stock Common Stock [Member] Treasury stock Treasury Stock [Member] Additional paid-in capital Additional Paid-in Capital [Member] Accumulated other comprehensive loss AOCI Attributable to Parent [Member] Retained earnings Retained Earnings [Member] Noncontrolling interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Beginning balance (in shares) Cumulative credit risk adjustment Cumulative Effect of New Accounting Principle in Period of Adoption Currency translation adjustment Change in net unrealized loss on investment securities Redemption Note credit risk adjustment Issuance of restricted stock Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Issuance of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Cancellation of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Shares repurchased by the Company and held as treasury shares Treasury Stock, Value, Acquired, Cost Method Shares repurchased by the Company and held as treasury shares (in shares) Treasury Stock, Shares, Acquired Cash dividends declared Dividends, Cash Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Ending balance Ending balance (in shares) Schedule of Customer Contract Liabilities [Abstract] Schedule of Customer Contract Liabilities [Abstract] Casino outstanding chips and front money deposits Casino outstanding chips and front money deposits Casino outstanding chips and front money deposits Change in outstanding chips and front money deposits Increase Decrease in outstanding chips and front money deposits Increase Decrease in outstanding chips and front money deposits Advanced room deposits and ticket sales Advanced room deposits and ticket sales Advanced room deposits and ticket sales Change in advanced room deposits and ticket sales Change in advanced room deposits and ticket sales Change in advanced room deposits and ticket sales Other gaming related liabilities Other gaming related liabilities Other gaming related liabilities Change in other gaming related liabilities Change in other gaming related liabilities Change in other gaming related liabilities Loyalty program liabilities Loyalty programs Loyalty programs Change in loyalty program liabilities Change in loyalty program liabilities Change in loyalty program liabilities Total Customer Contract Liabilities Total Customer Contract Liabilities Total Customer Contract Liabilities Change in total customer contract liabilities Change in total customer contract liabilities Change in total customer contract liabilities Related Party Transactions Related Party Transactions Disclosure [Text Block] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Trading Symbol Trading Symbol Schedule of Customer Contract Liabilities [Table Text Block] Schedule of Customer Contract Liabilities [Table Text Block] [Table Text Block] for Schedule of Customer Contract Liabilities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized cost Available-for-sale Securities, Amortized Cost Basis Gross unrealized gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized losses Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax Fair value (net carrying amount) Other-than-temporary impairment losses Other than Temporary Impairment Losses, Investments Segment Information Segment Reporting Disclosure [Text Block] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Accounting Standards Update 2016-01 Accounting Standards Update 2016-01 [Member] Accounting Standards Update 2016-01 [Member] Summary of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Bank deposits and cash on hand Percentage of credit markers due from customers residing outside of the United States Percentage Of Credit Markers Due From Customers Residing Outside Of United States Percentage of credit markers due from customers residing outside of the United States. Fair value of Redemption Note Gaming tax expenses Gaming Tax Expenses Gaming tax expense. Cumulative credit risk adjustment Increase in Restricted Cash Increase in Restricted Cash Macau Operations [Domain] Macau Operations [Domain] Macau Operations [Domain] Net revenues Adjusted Property EBITDA Adjusted Property Ebitda Earnings Before Interest, Taxes, Depreciation, Amortization, Pre-opening Costs, Property Charges And Other, Corporate Expenses, Stock-Based Compensation, And Other Non-Operating Income And Expenses And Includes Equity In Income From Unconsolidated Affiliates Other operating costs and expenses Other Operating Costs And Expenses [Abstract] Other Operating Costs and Expenses [Abstract] Pre-opening Pre-Opening Costs Property charges and other Project Abandonment Costs The aggregate amount of expenses charged against earnings to eliminate the capitalized costs of projects abandoned during the reporting period, expenses associated with business termination activities and other expenses. Corporate expenses and other Corporate Expenses And Other Corporate Expenses And Other Stock-based compensation Share-based Compensation Total other operating expenses Other Cost and Expense, Operating Non-operating income and expenses Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest Interest expense, net of amounts capitalized Interest Expense Change in interest rate swap fair value Gain (Loss) on Derivative Instruments, Net, Pretax Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Other Other Nonoperating Income (Expense) Total other non-operating income and expenses Nonoperating Income (Expense) Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Net income (loss) Net Income (Loss) Attributable to Noncontrolling Interest Net Income (Loss) Attributable to Noncontrolling Interest Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Foreign currency translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Unrealized loss on investment securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] AOCI Attributable to Parent [Member] Redemption Note Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member] Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] December 31, 2017 Accumulated Other Comprehensive Income (Loss), Net of Tax Redemption Note settlement credit risk adjustment Change in net unrealized loss Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified to net loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax March 31, 2018 Realized losses on investments Realized Investment Gains (Losses) Gain related to repayment of Redemption Note Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Shares used in Calculation of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of Restricted Cash and Cash Equivalents Schedule of Restricted Cash and Cash Equivalents [Table Text Block] Schedule of Receivables, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Changes by Component in Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Assets and Liabilities Carried at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Reconciliation of Amounts Previously Reported and Resulting Impacts from Adoption of New Revenue Recognition Guidance Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Investment securities Short-term Investments Receivables, net Inventories Inventory, Net Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Restricted cash Investment securities Marketable Securities, Noncurrent Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Deferred income taxes, net Deferred Income Tax Assets, Net Other assets Other Assets, Noncurrent Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts and construction payables Accounts Payable, Current Customer deposits Customer Deposits, Current Gaming taxes payable Gaming Taxes Payable Current Carrying amount as of the balance sheet date for taxes payable (due within one year or within one normal operating cycle, if longer) based on gross gaming revenue in the jurisdictions in operation, subject to applicable jurisdictional adjustments. Accrued compensation and benefits Employee-related Liabilities, Current Accrued interest Interest Payable, Current Current portion of long-term debt Dividends Payable Dividends Payable Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term debt Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 13) Commitments and Contingencies Stockholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock, par value $0.01; 40,000,000 shares authorized; zero shares issued and outstanding Preferred Stock, Value, Issued Common stock, par value $0.01; 400,000,000 shares authorized; 116,590,962 and 116,391,753 shares issued; 103,202,045 and 103,005,866 shares outstanding, respectively Common Stock, Value, Issued Treasury stock, at cost; 13,388,917 and 13,385,887 shares, respectively Treasury Stock, Value Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Retained earnings Retained Earnings (Accumulated Deficit) Total Wynn Resorts, Limited stockholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Schedule of Disaggregation of Revenues and Contract Liabilities [Table] Schedule of Disaggregation of Revenues and Contract Liabilities [Table] Schedule of Disaggregation of Revenues and Contract Liabilities [Table] Macau Operations [Member] Macau Operations [Member] Macau Operations Las Vegas Operations [Member] Las Vegas Operations [Member] Las Vegas Operations Schedule of Disaggregation of Revenues and Contract Liabilities [Line Items] Schedule of Disaggregation of Revenues and Contract Liabilities [Line Items] [Line Items] for Schedule of Disaggregation of Revenues and Contract Liabilities [Table] Casino Casino Revenue Occupancy Occupancy Revenue Food and Beverage Food and Beverage Revenue Entertainment Retail And Other Entertainment Retail And Other Revenue Revenue earned during the period from shows, retail outlets, convention space, spa, salon, wedding salon, golf course and other. Revenues Revenues Retail Joint Venture Variable Interest Entity Disclosure [Text Block] Income Statement [Abstract] Operating revenues: Revenues [Abstract] Casino Rooms Food and beverage Entertainment, retail and other Operating expenses: Costs and Expenses [Abstract] Casino Casino Expenses Rooms Occupancy Costs Food and beverage Food and Beverage, Cost of Sales Entertainment, retail and other Entertainment Retail And Other Costs Costs incurred during the period related to generating revenue from shows, retail outlets, convention space, spa, salon, wedding salon, golf course, and other operations. General and administrative Selling, General and Administrative Expense (Benefit) provision for doubtful accounts Other income (expense): Gain on extinguishment of debt Other income (expense), net Less: net income attributable to noncontrolling interests Net income (loss) attributable to Wynn Resorts, Limited Basic and diluted net income (loss) per common share: Earnings Per Share, Basic and Diluted [Abstract] Net income (loss) attributable to Wynn Resorts, Limited: Basic (in dollars per share) Diluted (in dollars per share) Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares)