XML 19 R55.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Guarantee Of Registered Securities (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Guarantor Obligations [Line Items] |  |
Senior notes aggregate outstanding principal balance | 1,700.0 us-gaap_SeniorNotes |
8.50% Senior Notes [Member] |  |
Guarantor Obligations [Line Items] |  |
Debt instrument interest rate stated percentage | 8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = esv_EightPointFiveZeroPercentSeniorNotesMember | 8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = esv_EightPointFiveZeroPercentSeniorNotesMember
Debt Instrument, Maturity Date | 2019 |
6.875% Senior Notes due 2020 [Member] |  |
Guarantor Obligations [Line Items] |  |
Debt instrument interest rate stated percentage | 6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = esv_SixPointEightSevenFivePercentSeniorNotesDueTwoThousandTwentyMember | 6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = esv_SixPointEightSevenFivePercentSeniorNotesDueTwoThousandTwentyMember
Debt Instrument, Maturity Date | 2020 |
7.875% Senior Notes [Member] |  |
Guarantor Obligations [Line Items] |  |
Debt instrument interest rate stated percentage | 7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = esv_SevenPointEightSevenFivePercentSeniorNotesMember | 7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = esv_SevenPointEightSevenFivePercentSeniorNotesMember
Debt Instrument, Maturity Date | 2040 |
7.20% Debentures Due 2027 [Member] |  |
Guarantor Obligations [Line Items] |  |
Debt instrument interest rate stated percentage | 7.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = esv_SevenPointTwoZeroPercentDebenturesDueTwoThousandTwentySevenMember |
Debt Instrument, Maturity Date | 2027 |
Senior notes aggregate outstanding principal balance | 150.0 us-gaap_SeniorNotes / us-gaap_DebtInstrumentAxis = esv_SevenPointTwoZeroPercentDebenturesDueTwoThousandTwentySevenMember |

X
- Definition Senior Note Maturity Year + References No definition available. + Details
Name: | esv_SeniorNoteMaturityYear
Namespace Prefix: | esv_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_SeniorNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=esv_EightPointFiveZeroPercentSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=esv_SevenPointEightSevenFivePercentSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=esv_SevenPointTwoZeroPercentDebenturesDueTwoThousandTwentySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=esv_SixPointEightSevenFivePercentSeniorNotesDueTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |