Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Equity [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] 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] Redemption Note Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Changes in AOCI: AOCI Attributable to Parent, Net of Tax [Roll Forward] Beginning of period Accumulated Other Comprehensive Income (Loss), Net of Tax Cumulative credit risk adjustment Redemption Note settlement credit risk adjustment Redemption Note settlement credit risk adjustment Change in net unrealized loss Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified to net income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax End of period Other-than-temporary impairment losses Other than Temporary Impairment Losses, Investments Realized losses on investments Realized Investment Gains (Losses) Gain on extinguishment of debt Gain (Loss) on Extinguishment of Debt Receivables [Abstract] Schedule of Receivables, net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Cash and Cash Equivalents [Abstract] Cash, Cash Equivalents and Restricted Cash Cash and Cash Equivalents Disclosure [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Casino Casino [Member] Rooms Occupancy [Member] Food and beverage Food and Beverage [Member] Entertainment, retail and other Entertainment Retail And Other [Member] Entertainment Retail And Other [Member] Statement [Line Items] Statement [Line Items] Operating revenues: Revenues [Abstract] Total operating revenues Revenue from Contract with Customer, Including Assessed Tax Operating expenses: Costs and Expenses [Abstract] Cost of goods and services sold Cost of Goods and Services Sold General and administrative Selling, General and Administrative Expense Litigation settlement LitigationSettlement_PromissoryNote Amount to settle allegations surrounding the interest rate on the redemption note. Provision for doubtful accounts Provision for Doubtful Accounts Pre-opening Pre-Opening Costs Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction 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. Total operating expenses Costs and Expenses Operating income (loss) Operating Income (Loss) Other income (expense): Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest Interest expense, net of amounts capitalized Interest Expense Change in derivatives fair value Gain (Loss) on Derivative Instruments, Net, Pretax Change in Redemption Note fair value Fair Value Adjustment of Debt Fair Value Adjustment of Debt Gain on extinguishment of debt Other Other Nonoperating Income (Expense) Other income (expense), net Nonoperating Income (Expense) Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Benefit (provision) for income taxes Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Less: net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income (loss) attributable to Wynn Resorts, Limited Net Income (Loss) Attributable to Parent Basic and diluted net income (loss) per common share: Earnings Per Share, Basic and Diluted [Abstract] Net income (loss) attributable to Wynn Resorts, Limited: Earnings Per Share [Abstract] Basic (in usd per share) Earnings Per Share, Basic Diluted (in usd per share) Earnings Per Share, Diluted Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Dividends declared per common share (usd per share) Common Stock, Dividends, Per Share, Declared Accounting Policies [Abstract] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Domestic And Foreign Corporate Bonds Domestic And Foreign Corporate Bonds [Member] Domestic And Foreign Corporate Bonds [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Wynn Palace Wynn Palace [Member] Wynn Palace [Member] Wynn Macau Wynn Macau [Member] Wynn Macau [Member] Wynn Las Vegas Wynn Las Vegas [Member] Wynn Las Vegas [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Summary of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Investment securities, amortized cost Debt Securities, Available-for-sale Investment securities, fair value Debt Securities, Available-for-sale, Amortized Cost Number of investment securities Debt Securities, Available-for-sale, Number of Securities Debt Securities, Available-for-sale, Number of Securities Square footage of non-cancelable operating leases Lessor, Operating Lease, Square Footage of Space Leased Lessor, Operating Lease, Square Footage of Space Leased Gaming tax expenses Gaming Tax Expenses Gaming tax expense. Operating lease assets and liabilities Operating Lease, Right-of-Use Asset (Lease Liability), Net Operating Lease, Right-of-Use Asset (Lease Liability), Net Definite-lived intangible assets reclassified to operating lease assets Lessee, Operating Lease, Reclassification of Finite-lived Intangible Assets to Right-of-Use Assets Lessee, Operating Lease, Reclassification of Finite-lived Intangible Assets to Right-of-Use Assets Property and equipment, net reclassified to operating lease assets Lessee, Operating Lease, Reclassification of Property, Plant and Equipment to Right-of-Use Assets Lessee, Operating Lease, Reclassification of Property, Plant and Equipment to Right-of-Use Assets Terms of lease contracts Lessor, Operating Lease, Term of Contract Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of Restricted Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Performance Shares Performance Shares [Member] 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 expense Allocated Share-based Compensation Expense Stock-based compensation costs Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost 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, par value (usd per share) Common Stock, Par or Stated Value Per Share 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 Leases [Abstract] Nine months ended December 31, 2019 Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year Year ended December 31, 2020 Lessor, Operating Lease, Payments to be Received, Two Years Year ended December 31, 2021 Lessor, Operating Lease, Payments to be Received, Three Years Year ended December 31, 2022 Lessor, Operating Lease, Payments to be Received, Four Years Year ended December 31, 2023 Lessor, Operating Lease, Payments to be Received, Five Years Thereafter Lessor, Operating Lease, Payments to be Received, Thereafter Total future minimum rentals Lessor, Operating Lease, Payments to be Received Equity Method Investments and Joint Ventures [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Retail Retail [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Retail Joint Venture Retail Joint Venture [Member] Retail Joint Venture [Member] Schedule of Variable Interest Entities [Line Items] Schedule of Equity Method Investments [Line Items] Assets Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Long-term Debt Long-term Debt Property, Plant and Equipment [Abstract] Schedule of Property and Equipment, Net Property, Plant and Equipment [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 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 Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] 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 and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [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] Cash equivalents Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Liabilities: Liabilities, Fair Value Disclosure [Abstract] Interest rate collar Derivative Liability Statement of Comprehensive Income [Abstract] Tax on Redemption Note credit risk adjustment Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Reclassification Adjustment, Tax 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] Retail Joint Venture Variable Interest Entity Disclosure [Text Block] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Wynn Palace and Wynn Macau Wynn Palace and Wynn Macau [Member] Wynn Palace and Wynn Macau [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Ground Leases Land [Member] Lease Amortization [Axis] Lease Amortization [Axis] Lease Amortization [Axis] Lease Amortization [Domain] Lease Amortization [Domain] [Domain] for Lease Amortization [Axis] Amortization each year 2020 through 2096 Annual Amortization, 2020 Through 2096 [Member] Annual Amortization, 2020 Through 2096 [Member] Amortization in 2097 Annual Amortization, 2097 [Member] Annual Amortization, 2097 [Member] Amortization each year 2020 through 2028 Annual Amortization, 2020 Through 2028 [Member] Annual Amortization, 2020 Through 2028 [Member] Amortization thereafter through 2037 Annual Amortization, 2029 Through 2037 [Member] Annual Amortization, 2029 Through 2037 [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Number of acres of undeveloped land leased Lessee, Operating Lease, Number of Acres of Undeveloped Land Lessee, Operating Lease, Number of Acres of Undeveloped Land Ground lease payments due 2019 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months Ground lease payments due 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two Ground lease payments due 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three Ground lease payments due 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four Ground lease payments due 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Ground lease payments due thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Liability associated with ground lease Operating Lease, Liability Operating lease assets related to amount allocated to leasehold interests in land Operating Lease, Right-of-Use Asset Expected amortization Operating Lease, Right-of-use Asset, Amortization Operating Lease, Right-of-use Asset, Amortization Terms of ground lease contracts Lessee, Operating Lease, Term of Contract Renewal terms of ground lease contracts Lessee, Operating Lease, Renewal Term Cash Cash Total cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Income Tax Disclosure [Abstract] Tax exemption period Tax Exemption Period Tax Exemption Period Complementary tax rate Complementary Tax Rate Complementary Tax Rate Amount of complementary tax exemption Amount Of Complementary Tax Exemption Amount of complementary tax exemption Basis of Presentation and Significant Accounting Policies Significant Accounting Policies [Text Block] Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Investment Securities Marketable Securities, Policy [Policy Text Block] Lessee Arrangements Lessee, Leases [Policy Text Block] Lessor Arrangements Lessor, Leases [Policy Text Block] Gaming Taxes Gaming Taxes Policy [Policy Text Block] Gaming Taxes Policy Pre-opening Expenses Pre-Opening Expenses, Policy [Policy Text Block] Pre-Opening Expenses, Policy [Policy Text Block] Recently Issued and Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy 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 Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Trading Symbol Trading Symbol 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 London Interbank Offered Rate (LIBOR) [Member] HIBOR HIBOR [Member] HIBOR [Member] Wynn Macau Wynn America Wynn America [Member] Wynn America [Member] Wynn/CA Plaza Property Owner, LLC And Wynn/CA Property Owner, LLC (The Borrowers) Wynn/CA Plaza Property Owner, LLC And Wynn/CA Property Owner, LLC [Member] Wynn/CA Plaza Property Owner, LLC And Wynn/CA Property Owner, LLC [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Term Loan Facility, due 2022 Senior Term Loan Facility, Due September 2021 [Member] Senior Term Loan Facility, Due September 2021 [Member] Senior Revolving Credit Facility, due 2022 Senior Revolving Credit Facility, Due September 2020 [Domain] Senior Revolving Credit Facility, Due September 2020 [Domain] Senior Term Loan Facility, due 2021 Senior Term Loan Facility, Due 2021 [Member] Senior Term Loan Facility, Due 2021 [Member] Retail Term Loan Agreement Retail Term Loan Agreement [Member] Retail Term Loan Agreement [Member] Wynn Resorts Term Loan Wynn Resorts Term Loan [Member] Wynn Resorts Term Loan [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] Term Loan Medium-term Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term debt, gross Long-term Debt, Gross Interest in addition to variable rate Debt Instrument, Basis Spread on Variable Rate Interest rate during period Debt Instrument, Interest Rate During Period Available borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Long-Term Debt Long-term Debt [Text Block] Lease cost: Lease, Cost [Abstract] Operating lease cost Operating Lease, Cost Short-term lease cost Short-term Lease, Cost Amortization of leasehold interests in land Finance Lease, Right-of-Use Asset, Amortization Variable lease cost Variable Lease, Cost Finance lease interest cost Finance Lease, Interest Expense Total lease cost Lease, Cost Supplemental cash flow disclosures: Lease, Other Information, Lessee [Abstract] Lease, Other Information, Lessee [Abstract] Operating lease liabilities arising from obtaining operating lease assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Cash paid for amounts included in the measurement of lease liabilities: Cash Flow, Lessee [Abstract] Cash Flow, Lessee [Abstract] Cash used in operating activities - Operating leases Operating Lease, Payments Cash used in operating activities - Finance leases Finance Lease, Interest Payment on Liability Weighted-average remaining lease term - Operating leases Operating Lease, Weighted Average Remaining Lease Term Weighted-average remaining lease term - Finance leases Finance Lease, Weighted Average Remaining Lease Term Weighted-average discount rate - Operating leases Operating Lease, Weighted Average Discount Rate, Percent Weighted-average discount rate - Finance leases Finance Lease, Weighted Average Discount Rate, Percent Debt Covenant Components [Axis] Debt Covenant Components [Axis] Debt Covenant Components [Axis] Debt Covenant Components [Domain] Debt Covenant Components [Domain] [Domain] for Debt Covenant Components [Axis] Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow [Member] Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow [Member] Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow, Prior to Opening of Encore Boston Harbor Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow, Prior to Opening of Encore Boston Harbor [Member] Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow, Prior to Opening of Encore Boston Harbor [Member] Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow, After Opening of Encore Boston Harbor Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow, After Opening of Encore Boston Harbor [Member] Mandatory Prepayments of Indebtedness Equal to 50 Percent of Excess Cash Flow, After Opening of Encore Boston Harbor [Member] Aruze United States Of America Inc Aruze United States Of America Inc [Member] Aruze United States Of America Inc [Member] WRL Term Loan I WRL Term Loan I [Member] WRL Term Loan I [Member] WRL Term Loan II WRL Term Loan II [Member] WRL Term Loan II [Member] Commitment Letter Commitment Letter [Member] Commitment Letter [Member] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Commitment Letter Line of Credit [Member] Debt instrument, face amount Debt Instrument, Face Amount Term loan, duration Debt Instrument, Term Balloon payment due at maturity Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid Mandatory prepayments of indebtedness, percent of excess cash flows Debt Instrument, Covenant Terms, Mandatory Prepayments of Indebtedness, Percent of Excess Cash Flows Debt Instrument, Covenant Terms, Mandatory Prepayments of Indebtedness, Percent of Excess Cash Flows Maximum consolidated senior secured net leverage ratio Debt Instrument, Covenant Terms, Maximum Consolidated Senior Secured Net Leverage Ratio Debt Instrument, Covenant Terms, Maximum Consolidated Senior Secured Net Leverage Ratio Amount of lenders' commitments agreed to terminate Line of Credit Facility, Maximum Borrowing Capacity, Amount Terminated Line of Credit Facility, Maximum Borrowing Capacity, Amount Terminated Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Common stock redeemed, shares Stock Redeemed or Called During Period, Shares Stated interest rate Debt Instrument, Interest Rate, Stated Percentage 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 the Redemption Note Long Term Debt Excluding Redemption Note Long Term Debt Excluding Redemption Note Revenue Recognition [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 Statement of Stockholders' Equity [Abstract] 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] 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 effect, change in accounting for credit risk, net of tax of $2,735 Cumulative Effect of New Accounting Principle in Period of Adoption Net income (loss) Currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Change in net unrealized loss on investment securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Redemption Note settlement Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 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 Restricted Stock Award, Forfeitures Cancellation of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited 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) Operating Leases Operating Lease Liabilities, Payments Due [Abstract] Nine months ended December 31, 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Year ended December 31, 2020 Year ended December 31, 2021 Year ended December 31, 2022 Year ended December 31, 2023 Thereafter Total undiscounted cash flows Lessee, Operating Lease, Liability, Payments, Due Short-term lease liabilities Operating Lease, Liability, Current Long-term lease liabilities Operating Lease, Liability, Noncurrent Total lease liabilities Difference between undiscounted and discounted cash flows Lessee, Operating Lease, Liability, Undiscounted Excess Amount Finance Leases Finance Lease Liabilities, Payments, Due [Abstract] Nine months ended December 31, 2019 Finance Lease, Liability, Payments, Remainder of Fiscal Year Year ended December 31, 2020 Finance Lease, Liability, Payments, Due Year Two Year ended December 31, 2021 Finance Lease, Liability, Payments, Due Year Three Year ended December 31, 2022 Finance Lease, Liability, Payments, Due Year Four Year ended December 31, 2023 Finance Lease, Liability, Payments, Due Year Five Thereafter Finance Lease, Liability, Payments, Due after Year Five Total undiscounted cash flows Finance Lease, Liability, Payments, Due Short-term lease liabilities Finance Lease, Liability, Current Long-term lease liabilities Finance Lease, Liability, Noncurrent Total lease liabilities Finance Lease, Liability Difference between undiscounted and discounted cash flows Finance Lease, Liability, Undiscounted Excess Amount Schedule of Assets and Liabilities Carried at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Legal Entity of Counterparty, Type [Axis] 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] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Receivables Accounts Receivable [Member] Outside the United States, primarily Asia Asia [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 Percentage of markers due from customers Concentration Risk, Percentage Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Summary of Lease Assets and Liabilities Assets and Liabilities, Lessee [Table Text Block] Assets and Liabilities, Lessee [Table Text Block] Schedule of Lease Cost and Other Information Lease, Cost [Table Text Block] Schedule of Operating Lease Maturity Analysis Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Finance Lease Maturity Analysis Finance Lease, Liability, Maturity [Table Text Block] Schedule of Minimum and Contingent Operating Lease Income Operating Lease, Lease Income [Table Text Block] Schedule of Future Minimum Rentals to be Received Under Operating Leases Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Tax on change in accounting for credit risk Segment Information Segment Reporting Disclosure [Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Assets Lease, Assets, Lesse [Abstract] Lease, Assets, Lesse [Abstract] Operating leases Finance lease Finance Lease, Right-of-Use Asset Current liabilities Lease, Liabilities, Current, Lessee [Abstract] Lease, Liabilities, Current, Lessee [Abstract] Operating leases Non-current liabilities Lease, Liabilities, Noncurrent, Lessee [Abstract] Lease, Liabilities, Noncurrent, Lessee [Abstract] Operating leases Finance lease Leases Lessee, Finance Leases [Text Block] Leases Lessee, Operating Leases [Text Block] Leases Lessor, Operating Leases [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies [Table] Commitments And Contingencies [Table] Commitments and Contingencies [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] MA Gaming Control Board Fine MA Gaming Control Board Fine [Member] MA Gaming Control Board Fine [Member] [Member] Nevada Gaming Control Board Fine Nevada Gaming Control Board Fine [Member] Nevada Gaming Control Board Fine [Member] Commitments and Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Damages sought Loss Contingency, Damages Sought, Value Amount of fine Litigation Settlement, Amount Awarded to Other Party Income Taxes Income Tax Disclosure [Text Block] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Revenue Revenue Recognition [Text Block] Revenue Recognition [Text Block] Organization Consolidation And Presentation Of Financial Statements Disclosure [Table] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] 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 Functional area square footage under construction Functional Area Square Footage Under Construction Functional Area Square Footage Under Construction Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Share Based Compensation Allocated Costs Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Receivables, net Loans, Notes, Trade and Other Receivables, Excluding Allowance for Credit Losses [Text Block] Minimum rental income Operating Lease, Lease Income, Lease Payments Minimum rental income Operating Leases, Rent Expense, Minimum Rentals Contingent rental income Operating Lease, Variable Lease Income Contingent rental income Operating Leases, Rent Expense, Contingent Rentals Total rental income Operating Lease, Lease Income Total rental income Operating Leases, Rent Expense, Net Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Deferred income taxes Deferred Income Tax Expense (Benefit) Amortization of debt issuance costs Amortization of Debt Issuance Costs Loss 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. Provision for doubtful accounts Change in derivatives 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, 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 provided by (used in) 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 intangible and other assets Payments to Acquire Debt Securities, Available-for-sale Proceeds from the sale or maturity of investment securities Proceeds from Sale and Maturity of Marketable Securities Purchase of investment securities 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 issuance of long-term debt Proceeds from Issuance of Long-term Debt Repayments of long-term debt Repayments of Long-term Debt Proceeds from note receivable from sale of ownership interest in subsidiary Proceeds from Equity Method Investment, Distribution, Return of Capital Repurchase of common stock Payments for Repurchase of Common Stock Proceeds from exercise of stock options Proceeds from Stock Options Exercised Dividends paid Payments of Dividends 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 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, Excluding Capitalized Interest, Operating Activities Capitalized stock-based compensation Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount 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 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 Dividends and Noncontrolling Interest [Table] Noncontrolling Interest [Table] Dividends and Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Cash dividend paid (usd per share) Common Stock, Dividends, Per Share, Cash Paid Cash dividends declared Schedule of Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Rooms Rooms [Member] Rooms [Member] Food and beverage Entertainment, retail and other General and administrative General And Administrative [Member] General And Administrative [Member] Preopening [Member] Preopening [Member] Preopening [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 Summary of Long-Term Debt Schedule of Long-term Debt Instruments [Table Text Block] Disaggregation of Revenues Schedule of Disaggregation of Revenues and Contract Liabilities [Table Text Block] [Table Text Block] for Schedule of Disaggregation of Revenues and Contract Liabilities [Table] Schedule of Customer Contract Liabilities Schedule of Customer Contract Liabilities [Table Text Block] [Table Text Block] for Schedule of Customer Contract Liabilities [Table] 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 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) 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) Net income (loss) attributable to Wynn Resorts, Limited per common share, basic (in usd per share) Net income attributable to Wynn Resorts, Ltd. per common share, diluted (in usd per share) Antidilutive securities excluded from computation of earnings per share (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Wynn Macau, Limited Wynn Macau, Limited [Member] Wynn Macau, Limited [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 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] 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] Senior Notes Senior Notes [Member] Less: Unamortized debt issuance costs and original issue discounts and premium, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Long-term debt total Less: 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 Schedule of Shares used in Calculation of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Earnings Per Share Earnings Per Share [Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Receivables, net Inventories Inventory, Net Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Restricted cash Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Operating lease assets 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 Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term debt Long-term operating lease liabilities Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 14) 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; 122,588,826 and 122,115,585 shares issued; 107,660,449 and 107,232,026 shares outstanding, respectively Common Stock, Value, Issued Treasury stock, at cost; 14,928,377 and 14,883,559 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 Macau Operations [Member] Macau Operations Las Vegas Operations 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] 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 Capitalized interest Interest Costs Capitalized Macau Operations Macau Operations [Domain] Macau Operations [Domain] Las Vegas 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] 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 Loss on extinguishment of debt Total other non-operating income and expenses Net Income (Loss) Attributable to Noncontrolling Interest Pre-opening expenses excluded from stock-based compensation Pre-Opening Costs Excluded from Share-based Compensation Pre-Opening Costs Excluded from Share-based Compensation Fair Value Measurements Fair Value Disclosures [Text Block] 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 Change in net unrealized loss on investment securities, before and after tax Redemption Note credit risk adjustment, net of tax of $2,735 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