2.4.0.6 Html 106 237 1 false 48 0 false 16 false false R1.htm 00 - Document - Document and Entity Information Sheet http://diamondoffshore.com/role/DocumentAndEntityInformation Document and Entity Information true false R2.htm 0110 - Statement - Consolidated Balance Sheets (Unaudited) Sheet http://diamondoffshore.com/role/BalanceSheets Consolidated Balance Sheets (Unaudited) false false R3.htm 0111 - Statement - Consolidated Balance Sheets (Parenthetical) (Unaudited) Sheet http://diamondoffshore.com/role/BalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) (Unaudited) false false R4.htm 0120 - Statement - Consolidated Statements of Operations (Unaudited) Sheet http://diamondoffshore.com/role/StatementsOfOperations Consolidated Statements of Operations (Unaudited) false false R5.htm 0130 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://diamondoffshore.com/role/StatementsOfComprehensiveIncome Consolidated Statements of Comprehensive Income (Unaudited) false false R6.htm 0140 - Statement - Consolidated Statements of Cash Flows (Unaudited) Sheet http://diamondoffshore.com/role/StatementsOfCashFlows Consolidated Statements of Cash Flows (Unaudited) false false R7.htm 0201 - Disclosure - General Information Sheet http://diamondoffshore.com/role/GeneralInformation General Information false false R8.htm 0202 - Disclosure - Supplemental Financial Information Sheet http://diamondoffshore.com/role/SupplementalFinancialInformation Supplemental Financial Information false false R9.htm 0203 - Disclosure - Earnings Per Share Sheet http://diamondoffshore.com/role/EarningsPerShare Earnings Per Share false false R10.htm 0204 - Disclosure - Marketable Securities Sheet http://diamondoffshore.com/role/MarketableSecurities Marketable Securities false false R11.htm 0205 - Disclosure - Derivative Financial Instruments Sheet http://diamondoffshore.com/role/DerivativeFinancialInstruments Derivative Financial Instruments false false R12.htm 0206 - Disclosure - Financial Instruments and Fair Value Disclosures Sheet http://diamondoffshore.com/role/FinancialInstrumentsAndFairValueDisclosures Financial Instruments and Fair Value Disclosures false false R13.htm 0207 - Disclosure - Drilling and Other Property and Equipment Sheet http://diamondoffshore.com/role/DrillingAndOtherPropertyAndEquipment Drilling and Other Property and Equipment false false R14.htm 0208 - Disclosure - Commitments and Contingencies Sheet http://diamondoffshore.com/role/CommitmentsAndContingencies Commitments and Contingencies false false R15.htm 0209 - Disclosure - Segments and Geographic Area Analysis Sheet http://diamondoffshore.com/role/SegmentsAndGeographicAreaAnalysis Segments and Geographic Area Analysis false false R16.htm 0210 - Disclosure - Income Taxes Sheet http://diamondoffshore.com/role/IncomeTaxes Income Taxes false false R17.htm 0501 - Disclosure - General Information (Tables) Sheet http://diamondoffshore.com/role/GeneralInformationTables General Information (Tables) false false R18.htm 0502 - Disclosure - Supplemental Financial Information (Tables) Sheet http://diamondoffshore.com/role/SupplementalFinancialInformationTables Supplemental Financial Information (Tables) false false R19.htm 0503 - Disclosure - Earnings Per Share (Tables) Sheet http://diamondoffshore.com/role/EarningsPerShareTables Earnings Per Share (Tables) false false R20.htm 0504 - Disclosure - Marketable Securities (Tables) Sheet http://diamondoffshore.com/role/MarketableSecuritiesTables Marketable Securities (Tables) false false R21.htm 0505 - Disclosure - Derivative Financial Instruments (Tables) Sheet http://diamondoffshore.com/role/DerivativeFinancialInstrumentsTables Derivative Financial Instruments (Tables) false false R22.htm 0506 - Disclosure - Financial Instruments and Fair Value Disclosures (Tables) Sheet http://diamondoffshore.com/role/FinancialInstrumentsAndFairValueDisclosuresTables Financial Instruments and Fair Value Disclosures (Tables) false false R23.htm 0507 - Disclosure - Drilling and Other Property and Equipment (Tables) Sheet http://diamondoffshore.com/role/DrillingAndOtherPropertyAndEquipmentTables Drilling and Other Property and Equipment (Tables) false false R24.htm 0509 - Disclosure - Segments and Geographic Area Analysis (Tables) Sheet http://diamondoffshore.com/role/SegmentsAndGeographicAreaAnalysisTables Segments and Geographic Area Analysis (Tables) false false R25.htm 0601 - Disclosure - General Information (Details) Sheet http://diamondoffshore.com/role/GeneralInformationDetails General Information (Details) false false R26.htm 06011 - Disclosure - General Information (Details 1) Sheet http://diamondoffshore.com/role/GeneralInformationDetails1 General Information (Details 1) false false R27.htm 06012 - Disclosure - General Information (Details Textual) Sheet http://diamondoffshore.com/role/GeneralInformationDetailsTextual General Information (Details Textual) false false R28.htm 0602 - Disclosure - Supplemental Financial Information (Details) Sheet http://diamondoffshore.com/role/SupplementalFinancialInformationDetails Supplemental Financial Information (Details) false false R29.htm 06021 - Disclosure - Supplemental Financial Information (Details 1) Sheet http://diamondoffshore.com/role/SupplementalFinancialInformationDetails1 Supplemental Financial Information (Details 1) false false R30.htm 06022 - Disclosure - Supplemental Financial Information (Details 2) Sheet http://diamondoffshore.com/role/SupplementalFinancialInformationDetails2 Supplemental Financial Information (Details 2) false false R31.htm 06023 - Disclosure - Supplemental Financial Information (Details Textual) Sheet http://diamondoffshore.com/role/SupplementalFinancialInformationDetailsTextual Supplemental Financial Information (Details Textual) false false R32.htm 0603 - Disclosure - Earnings Per Share (Details) Sheet http://diamondoffshore.com/role/EarningsPerShareDetails Earnings Per Share (Details) false false R33.htm 06031 - Disclosure - Earnings Per Share (Details 1) Sheet http://diamondoffshore.com/role/EarningsPerShareDetails1 Earnings Per Share (Details 1) false false R34.htm 0604 - Disclosure - Marketable Securities (Details) Sheet http://diamondoffshore.com/role/MarketableSecuritiesDetails Marketable Securities (Details) false false R35.htm 06041 - Disclosure - Marketable Securities (Details 1) Sheet http://diamondoffshore.com/role/MarketableSecuritiesDetails1 Marketable Securities (Details 1) false false R36.htm 0605 - Disclosure - Derivative Financial Instruments (Details) Sheet http://diamondoffshore.com/role/DerivativeFinancialInstrumentsDetails Derivative Financial Instruments (Details) false false R37.htm 06051 - Disclosure - Derivative Financial Instruments (Details 1) Sheet http://diamondoffshore.com/role/DerivativeFinancialInstrumentsDetails1 Derivative Financial Instruments (Details 1) false false R38.htm 06052 - Disclosure - Derivative Financial Instruments (Details Textual) Sheet http://diamondoffshore.com/role/DerivativeFinancialInstrumentsDetailsTextual Derivative Financial Instruments (Details Textual) false false R39.htm 0606 - Disclosure - Financial Instruments and Fair Value Disclosures (Details) Sheet http://diamondoffshore.com/role/FinancialInstrumentsAndFairValueDisclosuresDetails Financial Instruments and Fair Value Disclosures (Details) false false R40.htm 06061 - Disclosure - Financial Instruments and Fair Value Disclosures (Details 1) Sheet http://diamondoffshore.com/role/FinancialInstrumentsAndFairValueDisclosuresDetails1 Financial Instruments and Fair Value Disclosures (Details 1) false false R41.htm 06062 - Disclosure - Financial Instruments and Fair Value Disclosures (Details Textual) Sheet http://diamondoffshore.com/role/FinancialInstrumentsAndFairValueDisclosuresDetailsTextual Financial Instruments and Fair Value Disclosures (Details Textual) false false R42.htm 0607 - Disclosure - Drilling and Other Property and Equipment (Details) Sheet http://diamondoffshore.com/role/DrillingAndOtherPropertyAndEquipmentDetails Drilling and Other Property and Equipment (Details) false false R43.htm 06071 - Disclosure - Drilling and Other Property and Equipment (Details Textual) Sheet http://diamondoffshore.com/role/DrillingAndOtherPropertyAndEquipmentDetailsTextual Drilling and Other Property and Equipment (Details Textual) false false R44.htm 0608 - Disclosure - Commitments and Contingencies (Details) Sheet http://diamondoffshore.com/role/CommitmentsAndContingenciesDetails Commitments and Contingencies (Details) false false R45.htm 0609 - Disclosure - Segments and Geographic Area Analysis (Details) Sheet http://diamondoffshore.com/role/SegmentsAndGeographicAreaAnalysisDetails Segments and Geographic Area Analysis (Details) false false R46.htm 06091 - Disclosure - Segments and Geographic Area Analysis (Details 1) Sheet http://diamondoffshore.com/role/SegmentsAndGeographicAreaAnalysisDetails1 Segments and Geographic Area Analysis (Details 1) false false R47.htm 06092 - Disclosure - Segments and Geographic Area Analysis (Details Textual) Sheet http://diamondoffshore.com/role/SegmentsAndGeographicAreaAnalysisDetailsTextual Segments and Geographic Area Analysis (Details Textual) false false R48.htm 0610 - Disclosure - Income Taxes (Details) Sheet http://diamondoffshore.com/role/IncomeTaxesDetails Income Taxes (Details) false false All Reports Book All Reports Element us-gaap_ConstructionInProgressGross had a mix of decimals attribute values: -5 -3. Element us-gaap_InterestCostsCapitalized had a mix of decimals attribute values: -5 -3. Element us-gaap_ProvisionForDoubtfulAccounts had a mix of decimals attribute values: -6 -3. 'Monetary' elements on report '06012 - Disclosure - General Information (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06023 - Disclosure - Supplemental Financial Information (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06062 - Disclosure - Financial Instruments and Fair Value Disclosures (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06071 - Disclosure - Drilling and Other Property and Equipment (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '0608 - Disclosure - Commitments and Contingencies (Details)' had a mix of different decimal attribute values. Process Flow-Through: 0110 - Statement - Consolidated Balance Sheets (Unaudited) Process Flow-Through: Removing column 'Mar. 31, 2011' Process Flow-Through: Removing column 'Dec. 31, 2010' Process Flow-Through: 0111 - Statement - Consolidated Balance Sheets (Parenthetical) (Unaudited) Process Flow-Through: 0120 - Statement - Consolidated Statements of Operations (Unaudited) Process Flow-Through: 0130 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Process Flow-Through: 0140 - Statement - Consolidated Statements of Cash Flows (Unaudited) do-20120331.xml do-20120331.xsd do-20120331_cal.xml do-20120331_def.xml do-20120331_lab.xml do-20120331_pre.xml true true