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Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
NET LOSS	$ (39.8)	$ (907.6)
OTHER COMPREHENSIVE LOSS, NET
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	0.0	0.1
Reclassification of net gains on derivative instruments from other comprehensive loss into net loss	0.0	5.6
Other	(0.3)	0.2
NET OTHER COMPREHENSIVE LOSS	(0.3)	(5.3)
COMPREHENSIVE LOSS	(40.1)	(912.9)
COMPREHENSIVE (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	1.2	(2.4)
COMPREHENSIVE LOSS ATTRIBUTABLE TO VALARIS	$ (38.9)	$ (915.3)

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