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Supplemental Financial Information (Other Assets, Net) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Intangible assets	$ 40.4us-gaap_FiniteLivedIntangibleAssetsNet	$ 49.0us-gaap_FiniteLivedIntangibleAssetsNet
Unbilled receivables	4.5us-gaap_AccountsReceivableNetNoncurrent	18.6us-gaap_AccountsReceivableNetNoncurrent
Prepaid taxes on intercompany transfers of property	39.1us-gaap_PrepaidExpenseOtherNoncurrent	39.7us-gaap_PrepaidExpenseOtherNoncurrent
Deferred costs	83.6us-gaap_DeferredCosts	82.3us-gaap_DeferredCosts
Supplemental executive retirement plan assets	43.8us-gaap_AssetsHeldInTrustNoncurrent	43.2us-gaap_AssetsHeldInTrustNoncurrent
Warranty and other claim receivables	30.6us-gaap_ContractsReceivableClaimsAndUncertainAmounts	30.6us-gaap_ContractsReceivableClaimsAndUncertainAmounts
Deferred tax assets	37.0us-gaap_DeferredTaxAssetsGrossNoncurrent	38.4us-gaap_DeferredTaxAssetsGrossNoncurrent
Other	12.0esv_AssetsNoncurrentOther	12.4esv_AssetsNoncurrentOther
Other Assets, Net	$ 291.0us-gaap_OtherAssetsNoncurrent	$ 314.2us-gaap_OtherAssetsNoncurrent

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Assets Noncurrent Other

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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.

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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)

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The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate more than one year from the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited.

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Amount of billed or unbilled claims or other similar items subject to uncertainty concerning their determination or ultimate realization under long-term contracts.

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Sum of the carrying amounts of deferred costs that are expected to be recognized as a charge against earnings in periods after one year or beyond the normal operating cycle, if longer.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Carrying amount as of the balance sheet date of amounts paid in advance which will be charged against earnings in periods after one year or beyond the operating cycle, if longer.

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