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Supplemental Financial Information Schedule of Revenue by Major Customers, by Reporting Segments (Details) - Revenue Benchmark [Member] - Customer Concentration Risk	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
British Petroleum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	19.00%	11.00%	18.00%	12.00%
Equinor A S A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	9.00%	3.00%	10.00%	1.00%
Eni S.p.A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	7.00%	5.00%	6.00%	11.00%
Other Customers
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	65.00%	81.00%	66.00%	76.00%
Floaters
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	60.00%	53.00%	62.00%	53.00%
Floaters | British Petroleum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	12.00%	0.00%	9.00%	1.00%
Floaters | Equinor A S A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	9.00%	3.00%	10.00%	1.00%
Floaters | Eni S.p.A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	1.00%	1.00%	1.00%	5.00%
Floaters | Other Customers
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	38.00%	49.00%	42.00%	46.00%
Jackups
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	33.00%	37.00%	31.00%	37.00%
Jackups | British Petroleum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	2.00%	5.00%	4.00%	5.00%
Jackups | Equinor A S A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	0.00%	0.00%	0.00%	0.00%
Jackups | Eni S.p.A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	6.00%	4.00%	5.00%	6.00%
Jackups | Other Customers
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	25.00%	28.00%	22.00%	26.00%
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	7.00%	10.00%	7.00%	10.00%
Other | British Petroleum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	5.00%	6.00%	5.00%	6.00%
Other | Equinor A S A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	0.00%	0.00%	0.00%	0.00%
Other | Eni S.p.A
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	0.00%	0.00%	0.00%	0.00%
Other | Other Customers
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	2.00%	4.00%	2.00%	4.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
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