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Supplemental Financial Information (Accrued Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Deferred revenue	$ 240.5us-gaap_DeferredRevenueCurrent	$ 241.3us-gaap_DeferredRevenueCurrent
Personnel costs	145.5us-gaap_EmployeeRelatedLiabilitiesCurrent	214.0us-gaap_EmployeeRelatedLiabilitiesCurrent
Taxes	90.9us-gaap_TaxesPayableCurrent	97.0us-gaap_TaxesPayableCurrent
Interest	78.0us-gaap_InterestPayableCurrent	83.8us-gaap_InterestPayableCurrent
Derivative Liability	42.3us-gaap_DerivativeLiabilities	24.1us-gaap_DerivativeLiabilities
Other	28.4esv_LiabilitiesCurrentOther	36.4esv_LiabilitiesCurrentOther
Accrued liabilities and other	$ 625.6us-gaap_OtherLiabilitiesCurrent	$ 696.6us-gaap_OtherLiabilitiesCurrent

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Liabilities Current Other

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The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1)

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-Section 45

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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-Publisher FASB

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-SubTopic 10

-Section 50

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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

-Publisher FASB

-Name Accounting Standards Codification

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Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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