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Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details) | Dec. 31, 2020 rigs
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Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 61
Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 16
Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 36
Other [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 9
ARO |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 7
North & South America (Excluding Brazil) [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 11
North & South America (Excluding Brazil) [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 5
North & South America (Excluding Brazil) [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 6
North & South America (Excluding Brazil) [Member] | Other [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 0
North & South America (Excluding Brazil) [Member] | ARO |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 0
Europe & Mediterranean [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 23
Europe & Mediterranean [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 7
Europe & Mediterranean [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 16
Europe & Mediterranean [Member] | Other [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 0
Europe & Mediterranean [Member] | ARO |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 0
Middle East & Africa [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 19
Middle East & Africa [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 2
Middle East & Africa [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 8
Middle East & Africa [Member] | Other [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 9
Middle East & Africa [Member] | ARO |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 7
Asia Pacific [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 8
Asia Pacific [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 2
Asia Pacific [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 6
Asia Pacific [Member] | Other [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 0
Asia Pacific [Member] | ARO |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 0

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