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FAIR VALUE MEASUREMENTS (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Other assets $ 16,300,000us-gaap_OtherAssets    
Other Asset Impairment Charges 574,000,000us-gaap_OtherAssetImpairmentCharges 4,500,000us-gaap_OtherAssetImpairmentCharges 8,100,000us-gaap_OtherAssetImpairmentCharges
Property, Plant and Equipment, Net 7,432,212,000us-gaap_PropertyPlantAndEquipmentNet 6,385,755,000us-gaap_PropertyPlantAndEquipmentNet  
Customer No 1 [Member] | Consolidated Revenues [Member]      
Concentrations of Credit Risk [Abstract]      
Customer concentration, percentage 24.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= rdc_CustomerNo1Member		 26.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= rdc_CustomerNo1Member		 29.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= rdc_CustomerNo1Member
Customer No 1 [Member] | Accounts Receivable [Member]      
Concentrations of Credit Risk [Abstract]      
Customer concentration, percentage 29.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= rdc_CustomerNo1Member		    
Customer No 2 [Member] | Consolidated Revenues [Member]      
Concentrations of Credit Risk [Abstract]      
Customer concentration, percentage   11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= rdc_CustomerNo2Member		  
Customer No 3 [Member] | Consolidated Revenues [Member]      
Concentrations of Credit Risk [Abstract]      
Customer concentration, percentage     11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= rdc_CustomerNo3Member
Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Total 2,755,013,000us-gaap_NotesPayable
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 2,117,474,000us-gaap_NotesPayable
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Total 2,807,324,000us-gaap_NotesPayable
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 2,008,700,000us-gaap_NotesPayable
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
5% Senior Notes, due 2017 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 414,552,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueSeptember2017Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 433,879,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueSeptember2017Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
5% Senior Notes, due 2017 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 399,244,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueSeptember2017Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 398,961,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueSeptember2017Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
7.875% Senior Notes due 2019 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 570,626,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueAugust2019Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 603,177,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueAugust2019Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
7.875% Senior Notes due 2019 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 498,500,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueAugust2019Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 498,171,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueAugust2019Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
4.875% Senior Notes due 2022 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 680,165,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2022Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 711,816,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2022Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
4.875% Senior Notes due 2022 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 711,640,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2022Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 713,208,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2022Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
4.75% Senior Notes, due January 2024 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 377,703,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2024Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 0us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2024Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
4.75% Senior Notes, due January 2024 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 399,631,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2024Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 0us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2024Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
5.4% Senior Notes, due 2042 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 345,835,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2042Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 368,602,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2042Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
5.4% Senior Notes, due 2042 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 398,417,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2042Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 398,360,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJune2042Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
5.85% Senior Notes, due January 2044 [Member] | Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 366,132,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2044Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		 0us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2044Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember		  
5.85% Senior Notes, due January 2044 [Member] | Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes 399,892,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2044Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		 0us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= rdc_SeniorNotePayableDueJanuary2044Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember		  
Jack-up Drilling Rigs [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Other Asset Impairment Charges 565,700,000us-gaap_OtherAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= rdc_JackupDrillingRigsMember		    
Jack-up Rigs [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Property, Plant and Equipment, Net $ 840,800,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= rdc_JackupRigsMember