Property, Plant, and Equipment Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended				6 Months Ended				24 Months Ended
	Apr. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Dec. 31, 2027
Property, Plant and Equipment [Line Items]
Proceeds from disposition of assets							$ 27.6		$ 0.1
Loss on impairment					$ 0.0		7.8		0.0
Proceeds from disposition of assets							27.6		0.1
Loss on impairment					$ 0.0		7.8		$ 0.0
Angola office
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Other Assets			$ 4.0
Proceeds from disposition of assets			2.7	$ 2.5				$ 5.2
Proceeds from disposition of assets			2.7	$ 2.5				$ 5.2
Operating Segments \| Jackups
Property, Plant and Equipment [Line Items]
Loss on impairment							0.0
Loss on impairment							0.0
Operating Segments \| Floaters
Property, Plant and Equipment [Line Items]
Loss on impairment							7.8
Loss on impairment							7.8
V75 \| Operating Segments \| Jackups Member
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Other Assets			23.0
Proceeds from disposition of assets			14.0
Proceeds from disposition of assets			$ 14.0
V75 \| Operating Segments \| Jackups Member \| Subsequent Event
Property, Plant and Equipment [Line Items]
Proceeds from disposition of assets										$ 10.0
Proceeds from disposition of assets										$ 10.0
DPS-3, DPS-5 & DPS-6 \| Operating Segments \| Floaters
Property, Plant and Equipment [Line Items]
Proceeds from disposition of assets	$ 10.0
Loss on impairment		$ 0.0					7.8
Proceeds from disposition of assets	$ 10.0
Loss on impairment		$ 0.0					$ 7.8
V247 \| Operating Segments \| Jackups Member \| Subsequent Event
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Other Assets						$ 87.0
Proceeds from disposition of assets						108.0
Escrow Deposits Related to Property Sales						21.5
Proceeds from disposition of assets						$ 108.0

Valaris Ltd 10-Q