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Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2019
Feb. 28, 2020
Jun. 28, 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 001-32514    
Entity Registrant Name DIAMONDROCK HOSPITALITY CO    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 20-1180098    
Entity Address, Address Line One 2 Bethesda Metro Center, Suite 1400,    
Entity Address, City or Town Bethesda,    
Entity Address, State or Province MD    
Entity Address, Postal Zip Code 20814    
City Area Code 240    
Local Phone Number 744-1150    
Title of 12(b) Security Common Stock, $.01 par value    
Trading Symbol DRH    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 2.1
Entity Common Stock, Shares Outstanding (in shares)   200,357,322  
Documents Incorporated by Reference
Portions of the registrant's Proxy Statement for its 2020 Annual Meeting of Stockholders, to be filed with the Securities and Exchange Commission not later than 120 days after December 31, 2019, are incorporated by reference in Part III herein.
    
Entity Central Index Key 0001298946    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false