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Document and Entity Information Document
Jun. 01, 2020
Apr. 30, 2020
Entity Information [Line Items]    
Document Type 8-K  
Document Period End Date Jun. 01, 2020  
Entity Registrant Name Valaris plc  
Entity Incorporation, State or Country Code X0  
Entity File Number 1-8097  
Entity Tax Identification Number 98-0635229  
Entity Address, Address Line One 110 Cannon Street  
Entity Address, City or Town London  
Entity Address, State or Province GB  
Entity Address, Postal Zip Code EC4N6EU  
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
Entity Central Index Key   0000314808
Class A Ordinary Shares, US 0.40 Par Value [Member]    
Entity Information [Line Items]    
Title of 12(b) Security Class A ordinary shares, U.S. $0.40 par value  
Trading Symbol VAL  
Security Exchange Name NYSE  
Four Point Seven Zero Percent Senior Notes Due Two Thousand Twenty One Member    
Entity Information [Line Items]    
Title of 12(b) Security 4.70% Senior Notes due 2021  
Trading Symbol VAL21  
Security Exchange Name NYSE  
Four Point Five Zero Percent Senior Notes Due Two Thousand Twenty Four [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 4.50% Senior Notes due 2024  
Trading Symbol VAL24  
Security Exchange Name NYSE  
Eight Point Zero Percent Senior Notes Due Two Thousand Twenty Four [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 8.00% Senior Notes due 2024  
Trading Symbol VAL24A  
Security Exchange Name NYSE  
Five Point Two Percent Senior Notes [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 5.20% Senior Notes due 2025  
Trading Symbol VAL25A  
Security Exchange Name NYSE  
Seven Point Seven Five Percent Senior Notes Due Two Thousand Twenty Six [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 7.75% Senior Notes due 2026  
Trading Symbol VAL26  
Security Exchange Name NYSE  
Five Point Seven Five Percent Senior Notes [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 5.75% Senior Notes due 2044  
Trading Symbol VAL44  
Security Exchange Name NYSE  
4.875%SeniorNotesDue2022Member [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 4.875% Senior Note due 2022  
Trading Symbol VAL/22  
Security Exchange Name NYSE  
4.75%SeniorNotesDue2024Member [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 4.75% Senior Note due 2024  
Trading Symbol VAL/24  
Security Exchange Name NYSE  
7.38%SeniorNotesDue2025 [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 7.375% Senior Note due 2025  
Trading Symbol VAL/25  
Security Exchange Name NYSE  
5.40%SeniorNotesDue2042 [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 5.4% Senior Note due 2042  
Trading Symbol VAL/42  
Security Exchange Name NYSE  
5.85%SeniorNotesDue2044 [Member]    
Entity Information [Line Items]    
Title of 12(b) Security 5.85% Senior Note due 2044  
Trading Symbol VAL/44  
Security Exchange Name NYSE