XML 58 R45.htm IDEA: XBRL DOCUMENT v3.8.0.1

Debt Schedule of Extinguishment of Debt - Tender Offers and Repurchases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Feb. 28, 2018	Feb. 09, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 721.8
Debt Instrument, Repurchased Amount Paid in Cash	771.0
Gain (Loss) on Extinguishment of Debt	18.8	$ 3.4
8.50% senior notes due 2019
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	237.6
Debt Instrument, Repurchased Amount Paid in Cash	$ 256.8
Debt Instrument, Interest Rate, Stated Percentage	8.50%				8.50%
6.875% senior notes due 2020
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 328.0
Debt Instrument, Repurchased Amount Paid in Cash	$ 354.5
Debt Instrument, Interest Rate, Stated Percentage	6.875%				6.875%
4.70% senior notes due 2021
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 156.2
Debt Instrument, Repurchased Amount Paid in Cash	$ 159.7
Debt Instrument, Interest Rate, Stated Percentage	4.70%
8.00% senior notes due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.00%				8.00%
Senior Notes [Member] | 8.50% senior notes due 2019
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 55.0	$ 182.6
Debt Instrument, Interest Rate, Stated Percentage					8.50%
Senior Notes [Member] | 6.875% senior notes due 2020
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 71.4	$ 256.6
Debt Instrument, Interest Rate, Stated Percentage					6.875%
Senior Notes [Member] | 4.70% senior notes due 2021
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 156.2
Debt Instrument, Interest Rate, Stated Percentage					4.70%

X

- Definition

Debt Instrument, Repurchased Amount Paid in Cash

+ References

No definition available.

+ Details

Name:	esv_DebtInstrumentRepurchasedAmountPaidinCash
Namespace Prefix:	esv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- 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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_DebtInstrumentAxis=esv_FourPointSevenZeroPercentSeniorNotesDueTwoThousandTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=esv_A8.00seniornotesdue2024Member
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: