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v2.4.1.9

Supplemental Financial Information (Other Assets, Net) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Supplemental Financial Information [Abstract] |  |
Intangible assets | $ 49.0 us-gaap_FiniteLivedIntangibleAssetsNet | $ 83.8 us-gaap_FiniteLivedIntangibleAssetsNet
Unbilled reimbursable receivables | 18.6 us-gaap_AccountsReceivableNetNoncurrent | 51.9 us-gaap_AccountsReceivableNetNoncurrent
Prepaid taxes on intercompany transfers of property | 39.7 us-gaap_PrepaidExpenseOtherNoncurrent | 50.2 us-gaap_PrepaidExpenseOtherNoncurrent
Supplemental executive retirement plan assets | 43.2 us-gaap_AssetsHeldInTrustNoncurrent | 37.7 us-gaap_AssetsHeldInTrustNoncurrent
Contracts Receivable, Claims and Uncertain Amounts | 30.6 us-gaap_ContractsReceivableClaimsAndUncertainAmounts | 30.6 us-gaap_ContractsReceivableClaimsAndUncertainAmounts
Deferred mobilization costs | 82.3 us-gaap_DeferredCosts | 59.1 us-gaap_DeferredCosts
Deferred tax assets | 38.4 us-gaap_DeferredTaxAssetsNetNoncurrent | 25.2 us-gaap_DeferredTaxAssetsNetNoncurrent
Other | 12.4 esv_AssetsNoncurrentOther | 14.2 esv_AssetsNoncurrentOther
Other assets, net | $ 314.2 us-gaap_OtherAssetsNoncurrent | $ 352.7 us-gaap_OtherAssetsNoncurrent

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- Definition Amount due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 + Details
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