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Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details) | Dec. 31, 2015 rigs contract
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Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 68
Number of drilling management contracts | contract | 3
Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 26
Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 42
Middle East, Africa, Asia & Pacific Rim [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 24
Middle East, Africa, Asia & Pacific Rim [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 6
Middle East, Africa, Asia & Pacific Rim [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 18
North & South America (Excluding Brazil) [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 20
North & South America (Excluding Brazil) [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 13
North & South America (Excluding Brazil) [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 7
Europe & Mediterranean [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 14
Europe & Mediterranean [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 3
Europe & Mediterranean [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 11
Asia & Pacific Rim (Under Construction) [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 4
Asia & Pacific Rim (Under Construction) [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 1
Asia & Pacific Rim (Under Construction) [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 3
Middle East Under Construction [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 6
Middle East Under Construction [Member] | Floaters [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 3
Middle East Under Construction [Member] | Jackups [Member] |
Segment Reporting Information [Line Items] |
Total number of contract drilling rigs | 3

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