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Guarantee Of Registered Securities Guarantee Of Registered Securities (Condensed Consolidating Statements of Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
NET INCOME | $ 327.9 us-gaap_ProfitLoss | $ 296.7 us-gaap_ProfitLoss
OTHER COMPREHENSIVE INCOME (LOSS), NET: |  |
Net change in fair value of derivatives | (17.4)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | 4.9 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income | 5.0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax | 0.5 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
Other | 2.6 esv_AccumulatedOtherComprehensiveIncomeGainsAndLossesOnDerivativeInstrumentsOther | 0 esv_AccumulatedOtherComprehensiveIncomeGainsAndLossesOnDerivativeInstrumentsOther
NET OTHER COMPREHENSIVE (LOSS) INCOME | (9.8)us-gaap_OtherComprehensiveIncomeLossNetOfTax | 5.4 us-gaap_OtherComprehensiveIncomeLossNetOfTax
COMPREHENSIVE INCOME | 318.1 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 302.1 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS | (3.2)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | (4.2)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO | 314.9 us-gaap_ComprehensiveIncomeNetOfTax | 297.9 us-gaap_ComprehensiveIncomeNetOfTax
Ensco Plc [Member] |  |
NET INCOME | 324.7 us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_EnscoPlcMember | 292.5 us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_EnscoPlcMember
OTHER COMPREHENSIVE INCOME (LOSS), NET: |  |
Net change in fair value of derivatives | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember
NET OTHER COMPREHENSIVE (LOSS) INCOME | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember
COMPREHENSIVE INCOME | 324.7 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoPlcMember | 292.5 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoPlcMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoPlcMember | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoPlcMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO | 324.7 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember | 292.5 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_EnscoPlcMember
ENSCO International Inc. [Member] |  |
NET INCOME | 12.0 us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_EnscoInternationalIncMember | 57.6 us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_EnscoInternationalIncMember
OTHER COMPREHENSIVE INCOME (LOSS), NET: |  |
Net change in fair value of derivatives | (17.4)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember | 4.9 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income | 5.0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember | 0.5 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember
NET OTHER COMPREHENSIVE (LOSS) INCOME | (12.4)us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember | 5.4 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember
COMPREHENSIVE INCOME | (0.4)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoInternationalIncMember | 63.0 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoInternationalIncMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoInternationalIncMember | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_EnscoInternationalIncMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO | (0.4)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember | 63.0 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_EnscoInternationalIncMember
Pride International, Inc. [Member] |  |
NET INCOME | 48.0 us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_PrideInternationalIncMember | (27.5)us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_PrideInternationalIncMember
OTHER COMPREHENSIVE INCOME (LOSS), NET: |  |
Net change in fair value of derivatives | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember
NET OTHER COMPREHENSIVE (LOSS) INCOME | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember
COMPREHENSIVE INCOME | 48.0 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_PrideInternationalIncMember | (27.5)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_PrideInternationalIncMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_PrideInternationalIncMember | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_PrideInternationalIncMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO | 48.0 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember | (27.5)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_PrideInternationalIncMember
Other Non-Guarantor Subsidiaries Of Ensco [Member] |  |
NET INCOME | 448.4 us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember | 377.9 us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember
OTHER COMPREHENSIVE INCOME (LOSS), NET: |  |
Net change in fair value of derivatives | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember
Other | 2.6 esv_AccumulatedOtherComprehensiveIncomeGainsAndLossesOnDerivativeInstrumentsOther / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember |
NET OTHER COMPREHENSIVE (LOSS) INCOME | 2.6 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember
COMPREHENSIVE INCOME | 451.0 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember | 377.9 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS | (3.2)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember | (4.2)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO | 447.8 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember | 373.7 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_OtherNonGuarantorSubsidiariesMember
Consolidating Adjustments [Member] |  |
NET INCOME | (505.2)us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember | (403.8)us-gaap_ProfitLoss / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember
OTHER COMPREHENSIVE INCOME (LOSS), NET: |  |
Net change in fair value of derivatives | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember
Reclassification of net (gains) losses on derivative instruments from other comprehensive income into net income | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember
NET OTHER COMPREHENSIVE (LOSS) INCOME | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember
COMPREHENSIVE INCOME | (505.2)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember | (403.8)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember | 0 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember
COMPREHENSIVE INCOME ATTRIBUTABLE TO ENSCO | $ (505.2)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember | $ (403.8)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = esv_ConsolidatedAdjustmentsMember

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