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Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Mar. 06, 2020
Jun. 30, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 001-38850    
Entity Registrant Name TWIN RIVER WORLDWIDE HOLDINGS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-0904604    
Entity Address, Address Line One 100 Westminster Street    
Entity Address, City or Town Providence    
Entity Address, State or Province RI    
Entity Address, Postal Zip Code 02903    
City Area Code 401    
Local Phone Number 475-8474    
Title of 12(b) Security Common Stock, par value of $0.01 per share    
Trading Symbol TRWH    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company true    
Entity Ex Transition Period true    
Entity Shell Company false    
Entity Public Float     $ 822.0
Entity Common Stock, Shares Outstanding   31,570,415  
Documents Incorporated by Reference
Portions of the registrant’s definitive Proxy Statement for the Annual Meeting of Stockholders to be held on May 19, 2020 are incorporated herein by reference into Part III of this Annual Report on Form 10-K.
    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001747079    
Current Fiscal Year End Date --12-31