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Cover
Feb. 05, 2021
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Feb. 05, 2021
Entity File Number 1-8097
Entity Registrant Name Valaris plc
Entity Central Index Key 0000314808
Entity Tax Identification Number 98-0635229
Entity Incorporation, State or Country Code X0
Entity Address, Address Line One Cannon Place
Entity Address, Address Line Two 78 Cannon Street
Entity Address, City or Town London
Entity Address, Country GB
Entity Address, Postal Zip Code EC4N6AF
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
Former Address [Member]  
Document Information [Line Items]  
Entity Address, Address Line One 110 Cannon Street
Entity Address, City or Town London
Entity Address, Country GB
Entity Address, Postal Zip Code EC4N6EU