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Description Of The Business And Summary Of Significant Accounting Policies (Schedule Of Income From Continuing Operations Attributable To Valaris) (Details) - USD ($)
shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Accounting Policies [Abstract]      
NET LOSS ATTRIBUTABLE TO VALARIS $ 982.8 $ 373.4 $ 865.4
Basic 70,600 72,100 74,100
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements 300 800 1,100
Diluted 70,900 72,900 75,200