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Supplemental Financial Information (Other Current Assets) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Inventory	$ 250.4us-gaap_InventoryGross	$ 240.3us-gaap_InventoryGross
Disposal Group, Including Discontinued Operation, Assets, Current	152.8us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	152.4us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
Prepaid taxes	89.0us-gaap_PrepaidTaxes	90.6us-gaap_PrepaidTaxes
Deferred costs	60.7us-gaap_OtherDeferredCostsNet	61.9us-gaap_OtherDeferredCostsNet
Prepaid expenses	21.0us-gaap_PrepaidExpenseCurrent	33.8us-gaap_PrepaidExpenseCurrent
Deferred tax assets	43.8us-gaap_DeferredTaxAssetsGrossCurrent	43.8us-gaap_DeferredTaxAssetsGrossCurrent
Other	7.6esv_AssetsCurrentOther	6.6esv_AssetsCurrentOther
Other current assets	$ 625.3us-gaap_OtherAssetsCurrent	$ 629.4us-gaap_OtherAssetsCurrent

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Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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