XML 71 R57.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Debt (Schedule of Extinguishment of Debt - Tender and OMR) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Mar. 31, 2018 | Feb. 28, 2018 | Feb. 09, 2018 | Feb. 07, 2018 | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | --- | --- | --- | --- | --- | ---
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount | $ 721.8 |  |  |  |  |  |
Debt Instrument, Repurchase Amount | 771.2 |  |  |  |  |  |
8.50% Senior notes due 2019(1) |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount | 237.6 |  |  |  |  |  |
Debt Instrument, Repurchase Amount | 256.8 |  |  |  |  |  |
6.875% Senior notes due 2020(1) |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount | 328.0 |  |  |  |  |  |
Debt Instrument, Repurchase Amount | 354.7 |  |  |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount |  |  |  |  |  |  | $ 194.1
Debt Instrument, Repurchase Amount |  |  |  |  |  |  | 204.5
Senior Notes [Member] | 8.50% Senior notes due 2019(1) |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount | 237.6 |  | $ 55.0 | $ 182.6 |  | $ 200.4 | 54.6
Debt Instrument, Repurchase Amount |  |  |  |  |  |  | 60.1
Senior Notes [Member] | 6.875% Senior notes due 2020(1) |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount | 328.0 |  | $ 71.4 |  | $ 256.6 | 229.9 | 100.1
Debt Instrument, Repurchase Amount |  |  |  |  |  |  | 105.1
Senior Notes [Member] | 4.70% Senior notes due 2021(1) |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount | $ 156.2 | $ 156.2 |  |  |  | $ 413.3 | 39.4
Debt Instrument, Repurchase Amount |  | $ 159.7 |  |  |  |  | $ 39.3

X
- Definition Fair value amount of debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Face (par) amount of the original debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ExtinguishmentOfDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=esv_EightPointFiveZeroPercentSeniorNotesDueTwoThousandNineteenMember
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: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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