v2.4.0.8
Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)
Jun. 30, 2014
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 75 [1]
Floaters [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 29 [2]
Jackup [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 46 [3]
North & South America (Excl. Brazil) [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 21 [1]
North & South America (Excl. Brazil) [Member] | Floaters [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 9 [2]
North & South America (Excl. Brazil) [Member] | Jackup [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 12 [3]
Brazil [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 5 [1]
Brazil [Member] | Floaters [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 5 [2]
Brazil [Member] | Jackup [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 0 [3]
Europe & Mediterranean [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 12 [1]
Europe & Mediterranean [Member] | Floaters [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 2 [2]
Europe & Mediterranean [Member] | Jackup [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 10 [3]
Middle East & Africa [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 16 [1]
Middle East & Africa [Member] | Floaters [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 6 [2]
Middle East & Africa [Member] | Jackup [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 10 [3]
Asia & Pacific Rim [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 13 [1]
Asia & Pacific Rim [Member] | Floaters [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 4 [2]
Asia & Pacific Rim [Member] | Jackup [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 9 [3]
Asia & Pacific Rim (under construction) [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 8 [1]
Asia & Pacific Rim (under construction) [Member] | Floaters [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 3 [2]
Asia & Pacific Rim (under construction) [Member] | Jackup [Member]
  
Segment Reporting Information [Line Items]  
Number of contract drilling rigs (in rigs) 5 [3]
[1] We provide management services on two rigs owned by third-parties not included in the table above.
[2] The five floaters classified as "held for sale" as of June 30, 2014 are included in the table above.
[3] In July 2014, we accepted delivery of the ENSCO 122, which is committed under a long-term drilling contract.