Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Revenues Excluding Reimbursable Revenues	$ 2,207.9	$ 2,211.9	$ 1,676.0
Reimbursable Revenues	161.1	150.7	108.2
Total operating revenues	2,369.0	2,362.6	1,784.2
OPERATING EXPENSES
Contract Drilling Expenses Exclusive of Depreciation and Reimbursable Expenses	1,477.1	1,618.5	1,440.4
Reimbursable Expenses	152.6	142.4	103.2
Cost of Product and Service Sold	1,629.7	1,760.9	1,543.6
Loss on impairment	27.3	0.0	0.0
Depreciation	146.3	122.1	101.1
General and administrative	97.1	116.3	99.3
Total operating expenses	1,900.4	1,999.3	1,744.0
EQUITY IN EARNINGS (LOSSES) OF ARO	8.4	(11.0)	13.3
OPERATING INCOME	477.0	352.3	53.5
OTHER INCOME (EXPENSE)
Interest income	70.8	86.1	101.4
Interest expense, net	98.8	84.8	68.9
Other, net	103.3	16.6	(1.8)
Other income (expense), net	75.3	17.9	30.7
INCOME BEFORE INCOME TAXES	552.3	370.2	84.2
Current tax expense:
Current income tax expense	88.3	(5.4)	3.8
Deferred income tax expense (benefit)	(515.1)	5.8	(786.4)
Total provision for income taxes	(426.8)	0.4	(782.6)
NET INCOME	979.1	369.8	866.8
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	3.7	3.6	(1.4)
NET INCOME ATTRIBUTABLE TO VALARIS	$ 982.8	$ 373.4	$ 865.4
EARNINGS PER SHARE
Basic	$ 13.92	$ 5.18	$ 11.68
Diluted	$ 13.86	$ 5.12	$ 11.51
WEIGHTED-AVERAGE SHARES OUTSTANDING
Basic	70,600	72,100	74,100
Diluted	70,900	72,900	75,200