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Supplemental Financial Information Schedule of Revenue by Major Customers, by Reporting Segments (Details) - Revenue Benchmark [Member] - Customer Concentration Risk	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	Apr. 30, 2021	Jun. 30, 2021	Jun. 30, 2022	Apr. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%	100.00%
Equinor ASA
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	7.00%	6.00%	17.00%	6.00%	12.00%
British Petroleum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	11.00%	9.00%	13.00%	14.00%	14.00%
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	82.00%	85.00%	70.00%	80.00%	74.00%
Floaters | Equinor ASA
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage			72.00%		57.00%
Floaters | British Petroleum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	7.00%		35.00%	37.00%		39.00%
Jackups | Equinor ASA
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%		28.00%	100.00%	43.00%
Jackups | British Petroleum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	28.00%	25.00%	19.00%	17.00%		16.00%

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.

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