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Guarantee Of Registered Securities (Condensed Consolidating Statements Of Cash Flows) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
OPERATING ACTIVITIES    
Net cash (used in) provided by operating activities of continuing operations $ 467,700,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations $ 432,900,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
INVESTING ACTIVITIES    
Additions to property and equipment (397,100,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (272,600,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from Sale of Short-term Investments 12,000,000us-gaap_ProceedsFromSaleOfShortTermInvestments 0us-gaap_ProceedsFromSaleOfShortTermInvestments
Other 400,000us-gaap_PaymentsForProceedsFromOtherInvestingActivities 800,000us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Net cash provided by (used in) investing activities of continuing operations (384,700,000)us-gaap_NetCashProvidedByUsedInInvestingActivities (271,800,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
FINANCING ACTIVITIES    
Proceeds from Issuance of Senior Long-term Debt 1,078,700,000us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
Cash dividends paid (35,200,000)us-gaap_PaymentsOfDividendsCommonStock (175,700,000)us-gaap_PaymentsOfDividendsCommonStock
Payments of Debt Extinguishment Costs (23,400,000)us-gaap_PaymentsOfDebtExtinguishmentCosts 0us-gaap_PaymentsOfDebtExtinguishmentCosts
Payments of Financing Costs (8,900,000)us-gaap_PaymentsOfFinancingCosts 0us-gaap_PaymentsOfFinancingCosts
Reduction of long-term borrowings (861,700,000)us-gaap_RepaymentsOfLongTermDebt (7,100,000)us-gaap_RepaymentsOfLongTermDebt
Advances from (to) affiliates 0us-gaap_PaymentsForAdvanceToAffiliate 0us-gaap_PaymentsForAdvanceToAffiliate
Other (1,300,000)esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions (6,200,000)esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
Net cash provided by (used in) financing activities 148,200,000us-gaap_NetCashProvidedByUsedInFinancingActivities (189,000,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
DISCONTINUED OPERATIONS    
Operating activities (8,700,000)us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations (16,300,000)us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
Investing activities 400,000us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations 1,000,000us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
Net cash provided by discontinued operations (8,300,000)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations (15,300,000)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
Effect of exchange rate changes on cash and cash equivalents 100,000us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 100,000us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 223,000,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (43,100,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 664,800,000us-gaap_CashAndCashEquivalentsAtCarryingValue 165,600,000us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS, END OF PERIOD 887,800,000us-gaap_CashAndCashEquivalentsAtCarryingValue 122,500,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Ensco Plc [Member]    
OPERATING ACTIVITIES    
Net cash (used in) provided by operating activities of continuing operations (35,400,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
(50,100,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
INVESTING ACTIVITIES    
Additions to property and equipment 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Proceeds from Sale of Short-term Investments 0us-gaap_ProceedsFromSaleOfShortTermInvestments
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
 
Other 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Net cash provided by (used in) investing activities of continuing operations 0us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
FINANCING ACTIVITIES    
Proceeds from Issuance of Senior Long-term Debt 1,078,700,000us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
 
Cash dividends paid (35,200,000)us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
(175,700,000)us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Payments of Debt Extinguishment Costs (23,400,000)us-gaap_PaymentsOfDebtExtinguishmentCosts
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
 
Payments of Financing Costs (8,900,000)us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
 
Reduction of long-term borrowings (854,600,000)us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Advances from (to) affiliates (121,100,000)us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
221,300,000us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Other (1,000,000)esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
(3,900,000)esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Net cash provided by (used in) financing activities 34,500,000us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
41,700,000us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
DISCONTINUED OPERATIONS    
Operating activities 0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Investing activities 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Net cash provided by discontinued operations 0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
Effect of exchange rate changes on cash and cash equivalents 0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS (900,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
(8,400,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 287,400,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
46,500,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
CASH AND CASH EQUIVALENTS, END OF PERIOD 286,500,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
38,100,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoPlcMember
ENSCO International Inc. [Member]    
OPERATING ACTIVITIES    
Net cash (used in) provided by operating activities of continuing operations (10,800,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
(22,200,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
INVESTING ACTIVITIES    
Additions to property and equipment (5,100,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
(13,900,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Proceeds from Sale of Short-term Investments 0us-gaap_ProceedsFromSaleOfShortTermInvestments
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
 
Other 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Net cash provided by (used in) investing activities of continuing operations (5,100,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
(13,900,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
FINANCING ACTIVITIES    
Proceeds from Issuance of Senior Long-term Debt 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
 
Cash dividends paid 0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Payments of Debt Extinguishment Costs 0us-gaap_PaymentsOfDebtExtinguishmentCosts
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
 
Payments of Financing Costs 0us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
 
Reduction of long-term borrowings 0us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Advances from (to) affiliates 15,900,000us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
35,600,000us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Other 0esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Net cash provided by (used in) financing activities 15,900,000us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
35,600,000us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
DISCONTINUED OPERATIONS    
Operating activities 0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Investing activities 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Net cash provided by discontinued operations 0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Effect of exchange rate changes on cash and cash equivalents 0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
(500,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
500,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
CASH AND CASH EQUIVALENTS, END OF PERIOD 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_EnscoInternationalIncMember
Pride International, Inc. [Member]    
OPERATING ACTIVITIES    
Net cash (used in) provided by operating activities of continuing operations (36,300,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
(32,100,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
INVESTING ACTIVITIES    
Additions to property and equipment 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Proceeds from Sale of Short-term Investments 0us-gaap_ProceedsFromSaleOfShortTermInvestments
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
 
Other 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Net cash provided by (used in) investing activities of continuing operations 0us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
FINANCING ACTIVITIES    
Proceeds from Issuance of Senior Long-term Debt 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
 
Cash dividends paid 0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Payments of Debt Extinguishment Costs 0us-gaap_PaymentsOfDebtExtinguishmentCosts
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
 
Payments of Financing Costs 0us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
 
Reduction of long-term borrowings 0us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Advances from (to) affiliates 194,900,000us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
29,400,000us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Other 0esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
  
Net cash provided by (used in) financing activities 194,900,000us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
29,400,000us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
DISCONTINUED OPERATIONS    
Operating activities 0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Investing activities 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Net cash provided by discontinued operations 0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Effect of exchange rate changes on cash and cash equivalents 0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 158,600,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
(2,700,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 90,800,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
4,900,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
CASH AND CASH EQUIVALENTS, END OF PERIOD 249,400,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
2,200,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_PrideInternationalIncMember
Other Non-Guarantor Subsidiaries Of Ensco [Member]    
OPERATING ACTIVITIES    
Net cash (used in) provided by operating activities of continuing operations 550,200,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
537,300,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
INVESTING ACTIVITIES    
Additions to property and equipment (392,000,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(258,700,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Proceeds from Sale of Short-term Investments 12,000,000us-gaap_ProceedsFromSaleOfShortTermInvestments
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
 
Other 400,000us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
800,000us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Net cash provided by (used in) investing activities of continuing operations (379,600,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(257,900,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
FINANCING ACTIVITIES    
Proceeds from Issuance of Senior Long-term Debt 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
 
Cash dividends paid 0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Payments of Debt Extinguishment Costs 0us-gaap_PaymentsOfDebtExtinguishmentCosts
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
 
Payments of Financing Costs 0us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
 
Reduction of long-term borrowings 7,100,000us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(7,100,000)us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Advances from (to) affiliates (89,700,000)us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(286,300,000)us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Other (300,000)esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(2,300,000)esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Net cash provided by (used in) financing activities (97,100,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(295,700,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
DISCONTINUED OPERATIONS    
Operating activities (8,700,000)us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(16,300,000)us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Investing activities 400,000us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
1,000,000us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Net cash provided by discontinued operations (8,300,000)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(15,300,000)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Effect of exchange rate changes on cash and cash equivalents 100,000us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
100,000us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 65,300,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
(31,500,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 286,600,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
113,700,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
CASH AND CASH EQUIVALENTS, END OF PERIOD 351,900,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
82,200,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_OtherNonGuarantorSubsidiariesMember
Consolidating Adjustments [Member]    
OPERATING ACTIVITIES    
Net cash (used in) provided by operating activities of continuing operations 0us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
INVESTING ACTIVITIES    
Additions to property and equipment 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Proceeds from Sale of Short-term Investments 0us-gaap_ProceedsFromSaleOfShortTermInvestments
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
 
Other 0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_PaymentsForProceedsFromOtherInvestingActivities
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Net cash provided by (used in) investing activities of continuing operations 0us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
FINANCING ACTIVITIES    
Proceeds from Issuance of Senior Long-term Debt 0us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
 
Cash dividends paid 0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Payments of Debt Extinguishment Costs 0us-gaap_PaymentsOfDebtExtinguishmentCosts
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
 
Payments of Financing Costs 0us-gaap_PaymentsOfFinancingCosts
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
 
Reduction of long-term borrowings 0us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_RepaymentsOfLongTermDebt
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Advances from (to) affiliates 0us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_PaymentsForAdvanceToAffiliate
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Other 0esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0esv_ProceedsFromPaymentsForOtherFinancingActivitiesExcludingProceedsFromPaymentsForExerciseOfStockOptions
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Net cash provided by (used in) financing activities 0us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
DISCONTINUED OPERATIONS    
Operating activities 0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Investing activities 0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Net cash provided by discontinued operations 0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
Effect of exchange rate changes on cash and cash equivalents 0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
CASH AND CASH EQUIVALENTS, END OF PERIOD $ 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember
$ 0us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= esv_ConsolidatedAdjustmentsMember