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Document and Entity Information Document
May 26, 2021
Feb. 20, 2020
Document Information [Line Items]    
Entity Central Index Key   0000314808
Document Type 8-K  
Document Period End Date May 26, 2021  
Entity Registrant Name Valaris Limited  
Entity Incorporation, State or Country Code D0  
Entity File Number 1-8097  
Entity Tax Identification Number 98-1589854  
Entity Address, Address Line One Clarendon House, 2 Church Street  
Entity Address, City or Town Hamilton  
Entity Address, Country BM  
Entity Address, Postal Zip Code HM 11  
City Area Code 44 (0)  
Local Phone Number 20 7659 4660  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company false  
Amendment Flag   false
Common Class A    
Document Information [Line Items]    
Title of 12(b) Security Common Shares, $0.01 par value share  
Trading Symbol VAL  
Security Exchange Name NYSE  
Warrant    
Document Information [Line Items]    
Title of 12(b) Security Warrants to purchase Common Shares  
Trading Symbol VAL WS  
Security Exchange Name NYSE