XML 53 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 07, 2020
Jun. 28, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Trading Symbol DO    
Entity Registrant Name DIAMOND OFFSHORE DRILLING, INC.    
Entity Central Index Key 0000949039    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   137,703,910  
Entity Public Float     $ 572,749,915
Title of 12(b) Security Common Stock, $0.01 par value per share    
Security Exchange Name NYSE    
Entity Current Reporting Status Yes    
Entity File Number 1-13926    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 76-0321760    
Entity Address, Address Line One 15415 Katy Freeway    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77094    
City Area Code 281    
Local Phone Number 492-5300    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Documents Incorporated by Reference

Portions of the definitive proxy statement relating to the 2020 Annual Meeting of Stockholders of Diamond Offshore Drilling, Inc., which will be filed within 120 days of December 31, 2019, are incorporated by reference in Part III of this report.