XML 45 R45.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details) | Mar. 31, 2015
--- | ---
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 70 esv_TotalNumberOfContractDrillingRigs | [1]
Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 28 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember |
Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 42 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember |
North & South America (Excl. Brazil) [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 16 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = esv_NorthSouthAmericaExclBrazilMember | [1]
North & South America (Excl. Brazil) [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 9 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = esv_NorthSouthAmericaExclBrazilMember |
North & South America (Excl. Brazil) [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 7 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = esv_NorthSouthAmericaExclBrazilMember |
Brazil [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 4 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = country_BR | [1]
Brazil [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 4 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = country_BR |
Brazil [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 0 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = country_BR |
Europe & Mediterranean [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 12 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = esv_EuropeMediterraneanMember | [1]
Europe & Mediterranean [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 1 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = esv_EuropeMediterraneanMember |
Europe & Mediterranean [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 11 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = esv_EuropeMediterraneanMember |
Middle East & Africa [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 13 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = us-gaap_MiddleEastMember | [1]
Middle East & Africa [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 3 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = us-gaap_MiddleEastMember |
Middle East & Africa [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 10 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = us-gaap_MiddleEastMember |
Asia & Pacific Rim [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 11 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember | [1]
Asia & Pacific Rim [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 3 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Asia & Pacific Rim [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 8 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaMember |
Asia & Pacific Rim (under construction) [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 5 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = esv_AsiaUnderConstructionMember | [1]
Asia & Pacific Rim (under construction) [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 3 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = esv_AsiaUnderConstructionMember |
Asia & Pacific Rim (under construction) [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 2 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = esv_AsiaUnderConstructionMember |
Middle East Under Construction Member [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 2 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = esv_MiddleEastUnderConstructionMemberMember | [1]
Middle East Under Construction Member [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 0 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = esv_MiddleEastUnderConstructionMemberMember |
Middle East Under Construction Member [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 2 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = esv_MiddleEastUnderConstructionMemberMember |
Discontinued Operations, Held-for-sale [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 7 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementGeographicalAxis = us-gaap_DiscontinuedOperationsHeldforsaleMember | [1]
Discontinued Operations, Held-for-sale [Member] | Floaters [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 5 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_FloatersMember / us-gaap_StatementGeographicalAxis = us-gaap_DiscontinuedOperationsHeldforsaleMember |
Discontinued Operations, Held-for-sale [Member] | Jackups Member |  |
Segment Reporting Information [Line Items] |  |
Number of contract drilling rigs (in rigs) | 2 esv_TotalNumberOfContractDrillingRigs / us-gaap_StatementBusinessSegmentsAxis = esv_JackupsMember / us-gaap_StatementGeographicalAxis = us-gaap_DiscontinuedOperationsHeldforsaleMember |
[1] | We provide management services on six rigs owned by third-parties not included in the table above.

X
- Definition Total Number Of Contract Drilling Rigs + References No definition available. + Details
Name: | esv_TotalNumberOfContractDrillingRigs
Namespace Prefix: | esv_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=esv_FloatersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=esv_JackupsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_BR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=esv_AsiaUnderConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=esv_EuropeMediterraneanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=esv_MiddleEastUnderConstructionMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=esv_NorthSouthAmericaExclBrazilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_AsiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_DiscontinuedOperationsHeldforsaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=us-gaap_MiddleEastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |