Impairment of Long Lived Assets

No definition available.

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- Definition

Number Of Additional Rigs Committed To Be Sold

+ References

No definition available.

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- Definition

Number Of Rigs Committed To Be Sold

+ References

No definition available.

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- Definition

Price Per Barrel

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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- Definition

Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

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- Definition

The expense recognized in the current period that allocates the cost of a tangible asset used in providing revenue generating services over the asset's useful life.

+ References

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- Definition

A description of the impaired assets to be held and used by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Impairment

-URI http://asc.fasb.org/extlink&oid=6515133

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

+ References

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

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- Definition

Amount of increase (decrease) of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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Property And Equipment (Narrative) (Details) (USD $)	3 Months Ended								12 Months Ended
Property And Equipment (Narrative) (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014 rigs	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 517,300,000								$ 1,220,800,000
Cost of Services, Depreciation	139,400,000us-gaap_CostOfServicesDepreciation	135,200,000us-gaap_CostOfServicesDepreciation	132,200,000us-gaap_CostOfServicesDepreciation	131,100,000us-gaap_CostOfServicesDepreciation	127,500,000us-gaap_CostOfServicesDepreciation	124,700,000us-gaap_CostOfServicesDepreciation	124,000,000us-gaap_CostOfServicesDepreciation	120,000,000us-gaap_CostOfServicesDepreciation	537,900,000us-gaap_CostOfServicesDepreciation	496,200,000us-gaap_CostOfServicesDepreciation	443,800,000us-gaap_CostOfServicesDepreciation
Assets held for sale	152,400,000				8,600,000				152,400,000	8,600,000
Property and equipment	14,975,500,000us-gaap_PropertyPlantAndEquipmentGross				17,498,500,000us-gaap_PropertyPlantAndEquipmentGross				14,975,500,000us-gaap_PropertyPlantAndEquipmentGross	17,498,500,000us-gaap_PropertyPlantAndEquipmentGross
Impairment of Long Lived Assets									2,500,000,000esv_ImpairmentofLongLivedAssets
Impairment of Long-Lived Assets to be Disposed of									1,242,300,000
Price Per Barrel	55esv_PricePerBarrel	95esv_PricePerBarrel							55esv_PricePerBarrel
Asset Impairment Charges	3,515,200,000us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges	703,500,000us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges					4,218,700,000us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges
Number Of Rigs Committed To Be Sold			5esv_NumberOfRigsCommittedToBeSold
Drilling rigs and equipment [Member]
Property, Plant and Equipment [Line Items]
Increase in drilling rigs and equipment									(2,585,800,000)
Property and equipment	13,253,200,000				15,839,000,000				13,253,200,000	15,839,000,000
Work in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	1,587,300,000				1,558,500,000				1,587,300,000	1,558,500,000
Work in progress [Member] \| Jackup Rigs [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	179,300,000				43,700,000				179,300,000	43,700,000
Work in progress [Member] \| Ultra Deepwater Drillships [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	820,100,000				513,400,000				820,100,000	513,400,000
Work in progress [Member] \| Premium Jackup Rigs [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	59,200,000				627,200,000				59,200,000	627,200,000
Rig Enhancement Projects [Member] \| Moored Semisubmersible Rigs [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	233,100,000								233,100,000
ENSCO DS-2 [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets to be Disposed of			(288,000,000)
Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets to be Disposed of	407,900,000		546,400,000
Floaters [Member]
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use			991,500,000
Impaired Long-Lived Assets Held and Used, Asset Description									2
Cost of Services, Depreciation									358,100,000	342,200,000	283,300,000
Asset Impairment Charges									3,982,300,000
Number Of Additional Rigs Committed To Be Sold	1
Number Of Rigs Committed To Be Sold	5								6
Jackups [Member]
Property, Plant and Equipment [Line Items]
Impaired Long-Lived Assets Held and Used, Asset Description									10
Cost of Services, Depreciation									171,200,000	147,500,000	151,600,000
Asset Impairment Charges									$ 236,400,000
Number Of Additional Rigs Committed To Be Sold	2
Number Of Rigs Committed To Be Sold									2