Commitments and Contingencies (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($)
Credit facility \| Unsecured Debt
Other Commitments [Line Items]
Letters of credit outstanding amount	$ 110.7
Credit facility \| 2023 Revolving Credit Agreement
Other Commitments [Line Items]
Letters of credit outstanding amount	$ 6.7
Minimum
Other Commitments [Line Items]
Percentage of uncertain tax positions likelihood of being sustained	50.00%
Non-US \| Customs and Other Business Taxes
Other Commitments [Line Items]
Approximate audit claims assessed	$ 11.0

Percentage of uncertain tax positions likelihood of being sustained.

No definition available.

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Namespace Prefix:	ne_
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Balance Type:	na
Period Type:	duration

- Definition

Estimated amount of loss resulting from an adverse tax position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-15

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-15

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-12

+ Details

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- Definition

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

No definition available.

+ Details

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