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Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
PROPERTY AND EQUIPMENT, AT COST			$ 2,120.7	$ 1,889.0
V54 | Operating Segments [Member] | Jackups
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Other Assets	$ 27.3	$ 27.3
Equipment
Property, Plant and Equipment [Line Items]
PROPERTY AND EQUIPMENT, AT COST			1,488.2	1,312.5
Work-in-progress
Property, Plant and Equipment [Line Items]
PROPERTY AND EQUIPMENT, AT COST			592.5	537.0
Other
Property, Plant and Equipment [Line Items]
PROPERTY AND EQUIPMENT, AT COST			$ 40.0	$ 39.5

X

- Definition

Amount of gain (loss) on sale or disposal of other assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
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