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Document and Entity Information Document
Aug. 02, 2021
May 03, 2021
Entity Information [Line Items]    
Entity Central Index Key   0000314808
Document Type 8-K  
Document Period End Date Aug. 02, 2021  
Entity Registrant Name Valaris Limited  
Entity Incorporation, State or Country Code   D0
Entity File Number   001-08097
Entity Tax Identification Number   98-1589854
Entity Address, Address Line One Claredon 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    
Entity Information [Line Items]    
Title of 12(b) Security Common Shares, $0.01 par value share  
Trading Symbol VAL  
Security Exchange Name NYSE  
Warrant    
Entity Information [Line Items]    
Title of 12(b) Security Warrants to purchase Common Shares  
Trading Symbol VAL WS  
Security Exchange Name NYSE