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Property and Equipment (Narratives) (Details) - USD ($) $ in Millions	1 Months Ended			2 Months Ended	3 Months Ended		4 Months Ended	6 Months Ended
	May 31, 2022	Apr. 30, 2022	Apr. 30, 2021	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Apr. 30, 2021	Jun. 30, 2022	Mar. 31, 2022
Property, Plant and Equipment [Line Items]
Asset Impairment Charges			$ 0.0	$ 0.0	$ 34.5		$ 756.5	$ 34.5
Gain (Loss) on Disposition of Other Assets							5.3	2.0
Net proceeds from disposition of assets	$ 7.0			$ 0.2			30.1	146.5
Operating Segments [Member] | Jackups
Property, Plant and Equipment [Line Items]
Asset Impairment Charges					$ 0.0		0.0	$ 0.0
Operating Segments [Member] | Jackups | V113 & V114
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Other Assets		$ 120.0
Operating Segments [Member] | Jackups | V36
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Other Assets	$ 8.5
Foreign Exchange Forward | Loss on Impairment
Property, Plant and Equipment [Line Items]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income ("AOCI") into Income (Effective Portion)							$ 5.6
Floaters
Property, Plant and Equipment [Line Items]
Asset Impairment Charges						$ 756.5
Property, Plant, and Equipment, Fair Value Disclosure									$ 26.0

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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