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Disclosure - Subsequent Events (Details) Sheet http://www.nglenergypartners.com/role/DisclosureSubsequentEventsDetailsQuarterEnd Subsequent Events (Details) false false All Reports Book All Reports Element ngl_DebtInstrumentInterestCoverageRatio had a mix of decimals attribute values: 0 1. Element ngl_DebtInstrumentLeverageRatio had a mix of decimals attribute values: 0 1. Element us-gaap_AllocatedShareBasedCompensationExpense had a mix of decimals attribute values: -5 -3. Element us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt had a mix of decimals attribute values: -5 -3. Element us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit had a mix of decimals attribute values: 3 4. Element us-gaap_LineOfCreditFacilityAmountOutstanding had a mix of decimals attribute values: -5 -3. Element us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage had a mix of decimals attribute values: 4 5. Element us-gaap_PaymentsToAcquireBusinessesGross had a mix of decimals attribute values: -5 -3. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '4/1/2012 - 6/30/2012' is shorter (90 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '7/1/2012 - 9/30/2012' is shorter (91 days) and has only 1 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '10/1/2012 - 12/31/2012' is shorter (91 days) and has only 1 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '1/1/2013 - 3/31/2013' is shorter (89 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '4/1/2013 - 6/30/2013' is shorter (90 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '7/1/2013 - 9/30/2013' is shorter (91 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '10/1/2013 - 12/31/2013' is shorter (91 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '1/1/2014 - 3/31/2014' is shorter (89 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 40 values. Shorter duration columns must have at least one fourth (10) as many values. Column '7/1/2014 - 9/30/2014' is shorter (91 days) and has only 2 values, so it is being removed. 'Monetary' elements on report '14010 - Disclosure - Nature of Operations and Organization (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14040 - Disclosure - Acquisitions (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14041 - Disclosure - Acquisitions (Details 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '14042 - Disclosure - Acquisitions (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '14043 - Disclosure - Acquisitions (Details 4)' had a mix of different decimal attribute values. 'Monetary' elements on report '14045 - Disclosure - Acquisitions (Details 6)' had a mix of different decimal attribute values. 'Monetary' elements on report '14046 - Disclosure - Acquisitions (Details 7)' had a mix of different decimal attribute values. 'Monetary' elements on report '14048 - Disclosure - Acquisitions (Details 9)' had a mix of different decimal attribute values. 'Monetary' elements on report '14049 - Disclosure - Acquisitions (Details 10)' had a mix of different decimal attribute values. 'Monetary' elements on report '14051 - Disclosure - Acquisitions (Details 12)' had a mix of different decimal attribute values. 'Monetary' elements on report '14052 - Disclosure - Acquisitions (Details 13)' had a mix of different decimal attribute values. 'Monetary' elements on report '14053 - Disclosure - Acquisitions (Details 14)' had a mix of different decimal attribute values. 'Monetary' elements on report '14054 - Disclosure - Acquisitions (Details 15)' had a mix of different decimal attribute values. 'Monetary' elements on report '14056 - Disclosure - Property, Plant and Equipment (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14080 - Disclosure - Long-Term Obligations (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14081 - Disclosure - Long-Term Obligations (Details 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '14101 - Disclosure - Commitments and Contingencies (Details 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '14110 - Disclosure - Equity (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14111 - Disclosure - Equity (Details 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '14122 - Disclosure - Fair Value of Financial Instruments (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '14140 - Disclosure - Disposals and Impairments (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14150 - Disclosure - Transactions with Affiliates (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14170 - Disclosure - Condensed Consolidating Guarantor and Non-Guarantor Financial Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '14171 - Disclosure - Condensed Consolidating Guarantor and Non-Guarantor Financial Information (Details 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '14172 - Disclosure - Condensed Consolidating Guarantor and Non-Guarantor Financial Information (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '14173 - Disclosure - Condensed Consolidating Guarantor and Non-Guarantor Financial Information (Details 4)' had a mix of different decimal attribute values. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '4/1/2012 - 6/30/2012' is shorter (90 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '7/1/2012 - 9/30/2012' is shorter (91 days) and has only 1 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '10/1/2012 - 12/31/2012' is shorter (91 days) and has only 1 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '1/1/2013 - 3/31/2013' is shorter (89 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '4/1/2013 - 6/30/2013' is shorter (90 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '7/1/2013 - 9/30/2013' is shorter (91 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '10/1/2013 - 12/31/2013' is shorter (91 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '1/1/2014 - 3/31/2014' is shorter (89 days) and has only 2 values, so it is being removed. Columns in Cash Flows statement 'Condensed Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 39 values. Shorter duration columns must have at least one fourth (9) as many values. Column '7/1/2014 - 9/30/2014' is shorter (91 days) and has only 3 values, so it is being removed. 'Monetary' elements on report '24022 - Disclosure - Significant Accounting Policies (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '24040 - Disclosure - Acquisitions (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '24043 - Disclosure - Acquisitions (Details 4)' had a mix of different decimal attribute values. 'Monetary' elements on report '24050 - Disclosure - Property, Plant and Equipment (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '24070 - Disclosure - Long-Term Debt (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '24090 - Disclosure - Commitments and Contingencies (Details )' had a mix of different decimal attribute values. 'Monetary' elements on report '24100 - Disclosure - Equity (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '24101 - Disclosure - Equity (Details 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '24112 - Disclosure - Fair Value of Financial Instruments (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '24130 - Disclosure - Transactions with Affiliates (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '24150 - Disclosure - Subsequent Events (Details)' had a mix of different decimal attribute values. Process Flow-Through: 10010 - Statement - Consolidated Balance Sheets Process Flow-Through: 10015 - Statement - Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 10020 - Statement - Consolidated Statements of Operations Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2014' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2014' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2012' Process Flow-Through: Removing column '6 Months Ended Sep. 30, 2014' Process Flow-Through: Removing column '6 Months Ended Sep. 30, 2013' Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2013' Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2012' Process Flow-Through: 10030 - Statement - Consolidated Statements of Comprehensive Income Process Flow-Through: 10050 - Statement - Consolidated Statements of Cash Flows Process Flow-Through: Removing column '6 Months Ended Sep. 30, 2014' Process Flow-Through: Removing column '6 Months Ended Sep. 30, 2013' Process Flow-Through: 20010 - Statement - Condensed Consolidated Balance Sheets Process Flow-Through: 20015 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 20020 - Statement - Condensed Consolidated Statements of Operations Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2014' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2012' Process Flow-Through: Removing column '6 Months Ended Sep. 30, 2013' Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2014' Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2013' Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2012' Process Flow-Through: 20030 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) Process Flow-Through: 20050 - Statement - Condensed Consolidated Statements of Cash Flows Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2014' Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2013' Process Flow-Through: Removing column '12 Months Ended Mar. 31, 2012' ngl-20141112.xml ngl-20141112.xsd ngl-20141112_cal.xml ngl-20141112_def.xml ngl-20141112_lab.xml ngl-20141112_pre.xml true true