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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, 2020 | Apr. 30, 2021 | Jun. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage | 100.00% | 100.00% | 100.00% | 100.00% | 100.00%
British Petroleum |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage | 11.00% | 9.00% | 11.00% | 14.00% | 9.00%
Total S.A. |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage | 0.00% | 0.00% | 5.00% | 0.00% | 11.00%
Woodside Energy |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage | 0.00% | 0.00% | 12.00% | 0.00% | 7.00%
Other |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage | 89.00% | 91.00% | 72.00% | 86.00% | 73.00%
Floaters | British Petroleum |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage | 7.00% |  | 39.00% | 37.00% | 27.00%
Floaters | Total S.A. |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage |  |  | 56.00% |  | 82.00%
Jackups | British Petroleum |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk, percentage | 28.00% | 25.00% | 17.00% | 17.00% | 20.00%

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