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Supplemental Financial Information (Repair And Maintenance Expense Related To Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Supplemental Financial Information [Abstract] |  |  |
Repair and maintenance expense | $ 357.2 us-gaap_CostOfPropertyRepairsAndMaintenance | $ 287.8 us-gaap_CostOfPropertyRepairsAndMaintenance | $ 276.3 us-gaap_CostOfPropertyRepairsAndMaintenance

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- Details
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Namespace Prefix: | esv_
Data Type: | xbrli:stringItemType
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- Definition The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration