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Sale Leaseback (Details) (USD $) In Millions, unless otherwise specified | 32 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013
Sale Leaseback Transaction [Line Items] |  |  |  |
Deferred Gain on Sale of Property | $ 22.4 us-gaap_DeferredGainOnSaleOfProperty |  | $ 22.4 us-gaap_DeferredGainOnSaleOfProperty |
Other Accrued Liabilities, Noncurrent | 39.8 us-gaap_OtherAccruedLiabilitiesNoncurrent |  | 39.8 us-gaap_OtherAccruedLiabilitiesNoncurrent | 33.3 us-gaap_OtherAccruedLiabilitiesNoncurrent
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax | 19.3 us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax | [1],[2] |  |
ENSCO 83, 89, 93 and 98 [Member] |  |  |  |
Sale Leaseback Transaction [Line Items] |  |  |  |
Proceeds from Sale of Other Property, Plant, and Equipment |  |  | 211.8 us-gaap_ProceedsFromSaleOfOtherPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |
Sales Commissions and Fees |  |  | 5.3 us-gaap_SalesCommissionsAndFees / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |
Sale Leaseback Transaction, Net Book Value | 169.6 us-gaap_SaleLeasebackTransactionNetBookValue / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |  | 169.6 us-gaap_SaleLeasebackTransactionNetBookValue / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |
Gain (Loss) on Disposition of Property Plant Equipment |  |  | 7.5 us-gaap_GainLossOnSaleOfPropertyPlantEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |
Sale Leaseback Transaction, Deferred Gain, Net | 29.4 us-gaap_SaleLeasebackTransactionDeferredGainNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |  | 29.4 us-gaap_SaleLeasebackTransactionDeferredGainNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |
Deferred Gain on Sale of Property | $ 7.0 us-gaap_DeferredGainOnSaleOfProperty / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |  | $ 7.0 us-gaap_DeferredGainOnSaleOfProperty / us-gaap_PropertyPlantAndEquipmentByTypeAxis = esv_ENSCO838993and98Member |
[1] | In September 2014, we sold jackup rigs ENSCO 83, ENSCO 89, ENSCO 93 and ENSCO 98, all of which are contracted to Pemex. As described below, the loss on sale and operating results of ENSCO 93 were included in (loss) income from discontinued operations, net in our consolidated statement of operations for the three-year period ended December 31, 2014.
[2] | The rigs' operating results were reclassified to discontinued operations in our consolidated statements of operations for each of the years in the three-year period ended December 31, 2014 and were previously included within the operating segment noted in the above table.

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- Definition Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 40 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.U.Q2) -URI http://asc.fasb.org/extlink&oid=6955272&loc=d3e221323-122791 + Details
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- Definition Amount of gain (loss), before tax expense or benefit and not previously recognized, resulting from the sale of a business component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: 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=31042434&loc=d3e3602-108585 + Details
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- Definition The portion of the gain that will be recorded as income or a reduction in rent expense in future periods less amounts recognized in the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35688829&loc=d3e50609-112754 + Details
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- Definition The net book value of the asset(s) sold in connection with the sale of the property to another party and lease back to the seller. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51831-112757 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757 + Details
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