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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2022
Feb. 22, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2022    
Document Fiscal Year Focus 2022    
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 Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   101,320,164  
Entity Public Float     $ 594,790,930
Title of 12(b) Security Common Stock, $0.0001 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 Yes    
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag true    
Entity Bankruptcy Proceedings, Reporting Current true    
Documents Incorporated by Reference

The information called for by Part III, Items 10, 11, 12, 13 and 14 of this Form 10-K, will be included in a definitive proxy statement or an amendment to this Form 10-K to be filed within 120 days after the end of the fiscal year covered by this Form 10-K, and is incorporated herein by reference.

    
Auditor Firm ID 34    
Auditor Name DELOITTE & TOUCHE LLP    
Auditor Location Houston, Texas