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Discontinued Operations (Summary Of Income From Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 325.0 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue | $ 596.4 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue | $ 668.6 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Operating expenses |  |  |  |  |  |  |  |  | 372.0 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense | 577.6 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense | 544.3 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
Operating (loss) income before income taxes |  |  |  |  |  |  |  |  | (47.0)us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss | 18.8 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss | 124.3 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
Other income (expense) |  |  |  |  |  |  |  |  | 0 esv_DisposalGroupIncludingDiscontinuedOperationOtherIncomeLoss | 0.3 esv_DisposalGroupIncludingDiscontinuedOperationOtherIncomeLoss | 1.3 esv_DisposalGroupIncludingDiscontinuedOperationOtherIncomeLoss
Income tax benefit |  |  |  |  |  |  |  |  | (30.7)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod | (20.2)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod | (8.5)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod
Impairment of Long-Lived Assets to be Disposed of, Net of Tax Benefit |  |  |  |  |  |  |  |  | 1,158.8 esv_ImpairmentofLongLivedAssetstobeDisposedofNetofTaxBenefit | 0 esv_ImpairmentofLongLivedAssetstobeDisposedofNetofTaxBenefit | 0 esv_ImpairmentofLongLivedAssetstobeDisposedofNetofTaxBenefit
Gain on disposal of discontinued operations, net |  |  |  |  |  |  |  |  | 37.3 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | (1.1)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | (16.5)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
DISCONTINUED OPERATIONS, NET | $ (388.0)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ 9.2 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ (818.4)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ (2.0)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ (37.4)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ (8.1)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ 26.0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ 17.3 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ (1,199.2)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ (2.2)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | $ 100.6 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax

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- Definition Amount of gain (loss), after 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 Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e38679-109324 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition Amount of operating expenses attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + 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 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.12) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.14) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 5 + Details
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