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Commitments And Contingencies (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) drillship jackup	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Number of newbuild jackup rigs | jackup	20
Order Period	10 years
PercentageOfDownPaymentPaidForARONewbuilds	2500.00%
ARO Rigs Under Construction | drillship	2
Maximum contingent contributions to joint venture	$ 1,250.0
Letters of Credit Outstanding, Amount	141.4
Deposit Liabilities, Collateral Issued, Financial Instruments	$ 20.7	$ 31.1	$ 5.8
ENSCO DS-13 [Member]
Property, Plant and Equipment [Line Items]
Long-term Purchase Commitment, Description	119.1 million
ENSCO DS-14 [Member]
Property, Plant and Equipment [Line Items]
Long-term Purchase Commitment, Description	218.3 million

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- Definition

Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818

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ARO Rigs Under Construction

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Maximum Contingent Contributions To Joint Venture

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Number of Newbuild Jackup Rigs

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Order Period

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PercentageOfDownPaymentPaidForARONewbuilds

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