XML 21 R1.htm IDEA: XBRL DOCUMENT v3.22.0.1
Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2021
Feb. 17, 2022
Jun. 30, 2021
Document Information [Line Items]      
Document Type 10-K    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Annual Report true    
Document Transition Report false    
Entity File Number 1-8097    
Entity Registrant Name Valaris Limited    
Entity Incorporation, State or Country Code D0    
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    
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 true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 1,900,000,000
Entity Common Shares, Shares Outstanding   75,000,057  
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000314808    
Class A Ordinary Shares, U.S. [Member]      
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