Customer [Domain] Customer [Domain] Actuarial loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Business Combination, Separately Recognized Transactions [Domain] Business Combination, Separately Recognized Transactions [Domain] State Current State and Local Tax Expense (Benefit) Partners’ capital General Partners' Capital Account Accrued Environmental Loss Contingencies, Noncurrent Accrued Environmental Loss Contingencies, Noncurrent Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net Income (Loss) Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset Pension and Other Postretirement Plans, Policy [Policy Text Block] Pension and Other Postretirement Plans, Policy [Policy Text Block] Interest cost Defined Benefit Plan, Interest Cost Statistical Measurement [Domain] Statistical Measurement [Domain] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Fair Value, Concentration of Risk, Disclosure Items [Domain] Fair Value, Concentration of Risk, Disclosure Items [Domain] Defined Contribution Plan Employers Matching Contribution Percentage to Participants Percentage Conribution Defined Contribution Plan Employers Matching Contribution Percentage to Participants Percentage Conribution The percentage of the employer's matching contribution to a participants defined contribution plan as a matching contribution to the participants percentage contribution. Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment Fixed Income Securities Fixed Income Securities Percentage of mutual fund that is invested in fixed income securities. International index fund [Member] International index fund [Member] International index fund [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Major Property Class [Domain] Major Property Class [Domain] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Weighted-average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Other Assets, Noncurrent Other Assets, Noncurrent Rate to which the cost trend is assumed to decline (the ultimate trend rate) Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Entity File Number Entity File Number 2023 Long-Term Debt, Maturity, Year Two Related Party Transaction, Expenses from Transactions with Related Party Related Party Transaction, Expenses from Transactions with Related Party Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Long Term Debt Maturities Repayments Of Principal Total Long Term Debt Maturities Repayments Of Principal Total The total amount of repayment principal due on long-term debt maturities. Long-term debt, less current maturities Long-term Debt and Lease Obligation Weighted-average discount rate (%) Operating Lease, Weighted Average Discount Rate, Percent Schedule of Inventory, Current [Table Text Block] Schedule of Inventory, Current [Table Text Block] Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Schedule of Income Tax Expense (Benefit) and Effective Income Tax Rate Schedule of Income Tax Expense (Benefit) and Effective Income Tax Rate [Table Text Block] Tabular disclosure of the company's income tax expense (benefit) and effective income tax rate. Return on plan assets and other Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Restricted Cash and Cash Equivalents Items Restricted Cash and Cash Equivalents Items [Line Items] Local Phone Number Local Phone Number ASSETS Assets [Abstract] Exchanges payable Gas Balancing Payable, Current Related Party Transactions [Abstract] Related Party Transactions [Abstract] 2024 Long-Term Debt, Maturity, Year Three Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Entity-Wide Revenue, Major Customer, Percentage Concentration Risk, Percentage Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Debt Instrument [Axis] Debt Instrument [Axis] Accretion expense Asset Retirement Obligation, Accretion Expense Debt Instrument, Fair Value Disclosure Debt Instrument, Fair Value Disclosure Proceeds from Related Party Debt Proceeds from Related Party Debt Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] Commitments and Contingencies Disclosure Commitments and Contingencies Disclosure [Text Block] Transportation and storage of natural gas Transportation and storage of natural gas [Member] Transportation and storage of natural gas Related Party [Axis] Related Party [Axis] Prior service credit amortization Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 10% 10% [Member] 10% Capital Expenditures Incurred but Not yet Paid Capital Expenditures Incurred but Not yet Paid Ownership Interest [Table] Ownership Interest [Table] Ownership Interest [Table] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Other Noncurrent Liabilities [Table Text Block] Other Noncurrent Liabilities [Table Text Block] Interest Expense, Related Party Interest Expense, Related Party 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer [Text Block] 2022 Long-Term Debt, Maturity, Year One Commitments and Contingencies, Policy [Policy Text Block] Commitments and Contingencies, Policy [Policy Text Block] Distribution Made to Limited Partner, Cash Distributions Paid Distribution Made to Limited Partner, Cash Distributions Paid 2026 Long-Term Debt, Maturity, Year Five Defined Contribution Plan, Cost Defined Contribution Plan, Cost Expected long term reurn on assets, taxable accounts Expected long term reurn on assets, taxable accounts An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invetsed or to be invested to provide for the benefits included in the benefit obligation's taxable accounts. Property, Plant and Equipment, Other Types [Member] Property, Plant and Equipment, Other Types [Member] Other non-cash Other Noncash Income (Expense) Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Company Contributions Vested Company Contributions Vested Percentage company contributions are vested after five years. Entity Voluntary Filers Entity Voluntary Filers Plan Asset Categories Defined Benefit Plan, Plan Assets, Category [Domain] Contingent Residual Support Agreement, Amount Contingent Residual Support Agreement, Amount Amount of senior notes of an affiliate, the Partnership has agreed to provide contingent residual support for. Long-term Debt Long term debt, amount outstanding Long-term Debt Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Mortgage-backed securities Mortgage-backed securities Percent of mutual fund that is invested in mortgage-backed securities. Entity Small Business Entity Small Business Cash and Cash Equivalents Cash and Cash Equivalents [Member] Total partners’ capital Balance Balance Partners' Capital Natural Gas Volumes Natural Gas Volumes Volume of natural gas in MMBtu Asset Retirement Obligation [Policy Text Block] Asset Retirement Obligation [Policy Text Block] Total liabilities and partners’ capital Liabilities and Equity 2026 Lessee, Operating Lease, Liability, to be Paid, Year Five Scenario [Axis] Scenario [Axis] Fair Value [Abstract] Fair Value [Abstract] Fair Value [Abstract] Construction Work-In-Process [Member] Construction Work-In-Process [Member] Construction Work-In-Process [Member] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Defined Benefit Plans Disclosures [Table Text Block] Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax LIABILITIES AND PARTNERS’ CAPITAL Liabilities and Equity [Abstract] Income Statement [Table] Income Statement [Table] Property, plant and equipment Property, Plant and Equipment, Net [Abstract] Accounts payable Accounts Payable and Accrued Liabilities, Current OPERATING EXPENSES: Operating Expenses [Abstract] Entity Interactive Data Current Entity Interactive Data Current Thereafter Long-Term Debt, Maturity, after Year Five 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Pipelines [Member] Pipelines [Member] Minimum [Member] Minimum [Member] Minimum [Member] Changes in operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Unamortized Net Premiums And Fair Value Adjustments Unamortized Net Premiums And Fair Value Adjustments Unamortized Net Premiums And Fair Value Adjustments Affiliated Entity Affiliated Entity [Member] 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two U.S. bond index fund [Member] U.S. bond index fund [Member] U.S. bond index fund [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Non-Cash Distribution [Abstract] Non-Cash Distribution [Abstract] Non-Cash Distribution [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 8.25% Senior Notes, due November 14, 2029 [Member] 8.25% Senior Notes, due November 14, 2029 [Member] 8.25% Senior Notes, due November 14, 2029 [Member] Entity Address, State or Province Entity Address, State or Province Debt Narrative [Table] Debt Narrative [Table] Schedule of Effective Income Tax Rate Reconciliation [Table] Schedule of Effective Income Tax Rate Reconciliation [Table] Schedule of Effective Income Tax Rate Reconciliation [Table] 3.26% Junior Subordinated Notes due November 1, 2066 [Member] 3.26% Junior Subordinated Notes due November 1, 2066 [Member] 3.26% Junior Subordinated Notes due November 1, 2066 [Member] Current liabilities: Liabilities, Current [Abstract] 2025 Long-Term Debt, Maturity, Year Four Revenue [Policy Text Block] Revenue [Policy Text Block] General and Administrative Expense General and Administrative Expense Debt Obligations Debt Disclosure [Text Block] Statutory Accounting Practices, Jurisdiction [Domain] Statutory Accounting Practices, Jurisdiction [Domain] Senior Notes Due 2029 [Member] Senior Notes Due 2029 [Member] Supplemental Employee Retirement Plan [Member] Supplemental Employee Retirement Plan [Member] Related Party Operating, Maintenance and General Expenses Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party Equity Securities [Member] Equity Securities Equity Securities [Member] Accounting Policies [Abstract] Accounting Policies [Abstract] 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Summary of Significant Accounting Policies [Abstract] Summary of Significant Accounting Policies [Abstract] Summary of Significant Accounting Policies [Abstract] Federal Current Federal Tax Expense (Benefit) Present value of lease liabilities Present value of lease liabilities Operating Lease, Liability Document Transition Report Document Transition Report Total other expenses, net Nonoperating Income (Expense) Customer Concentration Risk Customer Concentration Risk [Member] Other Postretirement Benefits Plan [Member] Other Postretirement Benefits Plan [Member] Commitments and contingencies Commitments and Contingencies Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Emerging Growth Company Entity Emerging Growth Company Partner Capital Components [Domain] Partner Capital Components [Domain] Amount overfunded at end of period (1) Defined Benefit Plan, Funded (Unfunded) Status of Plan Business Combination, Separately Recognized Transactions [Axis] Business Combination, Separately Recognized Transactions [Axis] Revisions Asset Retirement Obligation, Revision of Estimate Asset Retirement Obligation, Revision of Estimate PEPL PEPL [Member] PEPL Statement of Partners' Capital [Abstract] Statement of Partners' Capital [Abstract] Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax Ownership [Axis] Ownership [Axis] Legal Entity Legal Entity Legal Entity [Axis] Auditor Name Auditor Name Cover [Abstract] Cover [Abstract] Accounts receivable from related companies Due from Related Parties, Current Total operating expenses Costs and Expenses Health care cost trend rate Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Other Current Liabilities [Table Text Block] Other Current Liabilities [Table Text Block] Less: present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Schedule of Effective Income Tax Rate Reconciliation [Line Items] Schedule of Effective Income Tax Rate Reconciliation [Line Items] [Line Items] for Schedule of Effective Income Tax Rate Reconciliation [Table] Revenue from Related Parties Revenue from Related Parties Entity [Domain] Entity [Domain] Environmental Cost, Expense Policy [Policy Text Block] Environmental Cost, Expense Policy [Policy Text Block] Concentration of Credit or Market Risk [Axis] Concentration of Credit or Market Risk [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Long-term Debt, Description Long-term Debt, Description Operating Income (Loss) Operating Income (Loss) Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Schedule of Change in Asset Retirement Obligation Schedule of Change in Asset Retirement Obligation [Table Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Operating, maintenance and general Operating Costs and Expenses Cash and cash equivalents CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Cash and Cash Equivalents, at Carrying Value Thereafter Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Non-Cash Equity Contribution Non-Cash Equity Contribution Non-Cash Equity Contribution Long-term Debt, Type Long-term Debt, Type [Domain] Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] Deferred income taxes Increase (Decrease) in Deferred Income Taxes Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Related Party Transactions Disclosure [Policy Text Block] Related Party Policy [Policy Text Block] Discussion of the Company's accounting treatment of related party receivables and payables. Customer A [Member] Customer A [Member] Customer A [Member] Dividends and Interest Paid Dividends and Interest Paid Asset Impairment Charges Goodwill Impairment Asset Impairment Charges Other, net Other Nonoperating Income (Expense) Defined Benefit Plan, Benefit Obligation, Benefits Paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Accumulated Other Comprehensive Loss [Policy Text Block] Accumulated Other Comprehensive Loss [Policy Text Block] The main components of comprehensive income (loss) that relate to the Company are net earnings, unrealized gain (loss) on hedging activities and unrealized actuarial gain (loss) and prior service credits (cost) on pension and other postretirement benefit plans. Capital expenditures Payments to Acquire Property, Plant, and Equipment Other current liabilities Other current liabilities Other Liabilities, Current Distribution to partners Partners' Capital Account, Distributions Note payable to related company Notes Payable, Related Parties, Noncurrent Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Maximum [Member] Maximum [Member] Maximum [Member] Customer B [Member] Customer B [Member] Customer B [Member] FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Lessee, Operating Lease, Liability, Maturity [Table Text Block] Lessee, Operating Lease, Liability, Maturity [Table Text Block] Lessor, Operating Leases Lessor, Operating Leases [Text Block] Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest City Area Code City Area Code Operational Gas Sales Operational Gas Sales [Member] Operational Gas Sales Amounts recognized in accumulated other comprehensive income (pre-tax basis) consist of: Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Partner Capital Components [Axis] Partner Capital Components [Axis] Defined Benefit Plan, Assumptions [Table Text Block] Defined Benefit Plan, Assumptions [Table Text Block] Entity Address, City or Town Entity Address, City or Town Interest Costs Capitalized Interest Costs Capitalized Schedule of Expected Benefit Payments [Table Text Block] Schedule of Expected Benefit Payments [Table Text Block] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Natural Gas, Storage [Member] Natural Gas, Storage [Member] 8.125% Senior Notes due 2019 Senior Notes due 2019 [Member] Operating Lease, Liability, Noncurrent Operating Lease, Liability, Noncurrent Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update [Axis] Other securities Other securities Percent of mutual fund that is invested in other securities. Current Income Tax Expense (Benefit) Current Income Tax Expense (Benefit) Interest expense, net Interest Expense Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) International Securities Funds International Securities Funds International Securities Funds Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Amount 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year One Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Lessee, Operating Lease, Term of Contract Lessee, Operating Lease, Term of Contract Beginning balance Ending balance Asset Retirement Obligation Entity Filer Category Entity Filer Category Income Statement [Abstract] Income Statement [Abstract] Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Entity Registrant Name Entity Registrant Name Other Top 10 Customers Other Top 10 Customers [Member] Other Top 10 Customers [Member] Tax exempt accounts Expected long term return on assets, tax exempt accounts An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invetested or to be invested to provide for the benefits included in the benefit obligation's tax exempt accounts. Fuel Tracker [Policy Text Block] Fuel Tracker [Policy Text Block] Policy for accounting for compressor fuel volumes owed to or from customers Settlement of affiliate liability - related party payables Settlement of affiliate liability - related party payables Amount of non-cash settlements of affiliate liabilities due from related parties. Basis of Presentation and Significant Accounting Policies [Policy Text Block] Basis of Presentation and Significant Accounting Policies [Text Block] Related Party Transaction [Axis] Related Party Transaction [Axis] Real Estate [Member] Real Estate [Member] Income tax benefit Total income tax benefit Income Tax Expense (Benefit) 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Amendment Flag Amendment Flag Entity Tax Identification Number Entity Tax Identification Number Investment Type [Axis] Investment Type [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Total lease payments Lessee, Operating Lease, Liability, to be Paid Concentration Risk Type [Domain] Concentration Risk Type [Domain] Inventories Inventories Inventory, Net Federal Deferred Federal Income Tax Expense (Benefit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Entity Public Float Entity Public Float Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] Revenue Benchmark Revenue Benchmark [Member] Short-term Lease, Cost Short-term Lease, Cost Panhandle Merger Stockholders' Equity, Other 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Defined Benefit Plan by Plan Asset Categories Defined Benefit Plan, Plan Assets, Category [Axis] Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Accounts Receivable and Allowance for Doubtful Accounts [Policy Text Block] Accounts Receivable and Allowance for Doubtful Accounts [Policy Text Block] - Disclosure of accounting policy for trade and other accounts receivable, including the allowance for doubtful accounts. Amortization of deferred financing fees Amortization of Debt Discount (Premium) Statement Statement [Line Items] Energy Transfer Energy Transfer [Member] Energy Transfer Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Retirement Plan Type [Domain] Retirement Plan Type [Domain] Schedule of Allocation of Plan Assets [Table Text Block] Schedule of Allocation of Plan Assets [Table Text Block] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Debt Disclosure [Abstract] Debt Disclosure [Abstract] Income (Loss) from Continuing Operations Before Income Tax Expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Type of Adoption [Domain] Accounting Standards Update [Domain] Schedule of Health Care Cost Trend Rates [Table Text Block] Schedule of Health Care Cost Trend Rates [Table Text Block] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Auditor Location Auditor Location Accounts payable to related companies Accounts Payable, Related Parties, Current Customer [Axis] Customer [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Benefits Retirement Benefits [Text Block] Senior Notes Senior Notes, Noncurrent Use of Estimates, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Document Annual Report Document Annual Report Total assets Assets Interest Paid, Excluding Capitalized Interest, Operating Activities Interest Paid, Excluding Capitalized Interest, Operating Activities Document Type Document Type Product and Service [Domain] Product and Service [Domain] Inventory Accounting Policies [Abstract] Inventory Accounting Policies [Abstract] Inventory Accounting Policies [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Prior service cost Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Remaining Customers Remaining Customers [Member] Remaining Customers [Member] 7.60% Senior Notes, due February 1, 2024 [Member] 7.60% Senior Notes, due February 1, 2024 [Member] 7.60% Senior Notes, due February 1, 2024 [Member] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Provision for rate refunds (1) Customer Refund Liability, Noncurrent Income Statement Income Statement [Line Items] Net cash flows provided by operating activities Net Cash Provided by (Used in) Operating Activities Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] New Accounting Pronouncements [Abstract] New Accounting Pronouncements [Abstract] New Accounting Pronouncements [Abstract] Accrued Liabilities and Other Liabilities Accrued Liabilities and Other Liabilities Exchanges receivable Gas Balancing Asset (Liability) Defined Benefit Plan, Service Cost Defined Benefit Plan, Service Cost Net actuarial gain Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Long-term Debt, Weighted Average Interest Rate, at Point in Time Long-term Debt, Weighted Average Interest Rate, at Point in Time Other Accrued Liabilities Other Accrued Liabilities Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive Income (Loss), Net of Tax, Attributable to Parent Contract with Customer, Liability Contract with Customer, Liability Net cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities Related Party Transaction Related Party Transaction [Line Items] Income from unconsolidated affiliates Income (Loss) from Equity Method Investments Limited partnership interest Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Energy Related Inventory, Natural Gas in Storage Energy Related Inventory, Natural Gas in Storage Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Savings Plan [Member] Savings Plan [Member] Savings Plan Concentration Risk Type [Axis] Concentration Risk Type [Axis] Company Contributions Years Company Contributions Years Number of years of continuous service when company contributions are fully vested. Available-for-sale Securities [Member] Available-for-sale Securities [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] ARO Assets ARO Assets [Domain] [Domain] for ARO Assets [Axis] Contract with Customer, Asset, after Allowance for Credit Loss Contract with Customer, Asset, after Allowance for Credit Loss NET CHANGE IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) Jurisdiction [Axis] Jurisdiction [Axis] Inventory, Raw Materials and Supplies Inventory, Raw Materials and Supplies, Gross OPERATING REVENUES: Revenues [Abstract] Other Accrued Liabilities, Current Other Sundry Liabilities, Noncurrent Document Period End Date Document Period End Date Large Cap US Equitiies Large Cap US Equitiies Percentage of mutual fund that is invested in large-cap U.S. equities. Entity Central Index Key Entity Central Index Key Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Fixed Income Securities [Member] Fixed Income Securities Fixed Income Securities [Member] Product and Service, Other [Member] Product and Service, Other [Member] Description of the Business Description of the Business [Line Items] Description of the Business [Line Items] State Deferred State and Local Income Tax Expense (Benefit) Junior Subordinated Notes Junior Subordinated Notes Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Investments, Fair Value Disclosure Investments, Fair Value Disclosure Market index fund [Member] Market index fund [Member] Market index fund [Member] Related Party Transactions [table text block] Related Party Transactions [table text block] Tabular disclosure of the company's related party balances included in the balance sheet. Loss Contingencies [Line Items] Loss Contingencies [Line Items] Property, plant and equipment, net Net property, plant and equipment Property, Plant and Equipment, Net Land and Land Improvements [Member] Land and Land Improvements [Member] Other non-current liabilities Other Liabilities, Noncurrent Other Liabilities, Noncurrent Benefit obligation at beginning of period Benefit obligation at end of period Defined Benefit Plan, Benefit Obligation Schedule Of Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Debt Instrument Debt Instrument Debt Instrument [Line Items] Repayments of Long-term Debt Repayments of Long-term Debt Repayments of Related Party Debt Repayments of Related Party Debt Total property, plant and equipment Property, Plant and Equipment, Gross Property, Plant and Equipment, Gross Related Party Transaction [Domain] Related Party Transaction [Domain] Total operating revenues Revenues Equipment [Member] Equipment [Member] Top Customers [Abstract] Top Customers [Abstract] Top Customers [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Entity Current Reporting Status Entity Current Reporting Status Fair value of plan assets at beginning of period Fair value of plan assets at end of period Defined Benefit Plan, Plan Assets, Amount Defined Benefit Plan, Plan Assets, Amount Other Liabilities, Current [Abstract] Other Liabilities, Current [Abstract] Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Investments Investments [Domain] Property, Plant and Equipment, Estimated Useful Lives Property, Plant and Equipment, Estimated Useful Lives Defined Benefit Plan Disclosure Defined Benefit Plan Disclosure [Line Items] Schedules of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Current assets: Assets, Current [Abstract] Leases [Abstract] Leases [Abstract] Income Tax, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Postemployment Benefits [Abstract] Postemployment Benefits [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Liability, Other Retirement Benefits, Noncurrent Liability, Other Retirement Benefits, Noncurrent Asset Retirement Obligation Disclosure [Abstract] Asset Retirement Obligation Disclosure [Abstract] Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Estimated litigation liability Estimated Litigation Liability Taxes on Income Income Tax Disclosure [Text Block] Long-term Debt, Type Long-term Debt, Type [Axis] Related Party Related Party [Domain] Schedule of Net Benefit Costs [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments, Policy [Policy Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] OTHER EXPENSE: Nonoperating Income (Expense) [Abstract] Auditor Firm ID Auditor Firm ID Asset Retirement Obligation Asset Retirement Obligations, Noncurrent Entity Address, Address Line One Entity Address, Address Line One Net cash flows used in investing activities Net Cash Provided by (Used in) Investing Activities Entity Address, Address Line Two Entity Address, Address Line Two Building and Building Improvements [Member] Building and Building Improvements [Member] Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Consolidation, Policy [Policy Text Block] Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Total current liabilities Liabilities, Current Accrued Capital Expenditures Accrued Capital Expenditures The amount of obligations incurred and payable, pertaining to costs that are capital expenditures. Limited Partner [Member] Limited partnership Limited Partner [Member] Loss Contingencies [Table] Loss Contingencies [Table] Revenue from Contract with Customer, Including Assessed Tax Revenue from Contract with Customer, Including Assessed Tax Defined Contribution Plan, Employer Matching Contribution, Percent Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Ownership [Domain] Ownership [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement [Table] Statement [Table] Other current assets Other Assets, Current Schedule Of Net Benefit Costs [Table] Schedule Of Net Benefit Costs [Table] Schedule of the components of net periodic benefit cost of the Company's pension nd postretirement benefit plans Partners’ capital: Partners' Capital [Abstract] 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Statistical Measurement [Axis] Statistical Measurement [Axis] Settled Asset Retirement Obligation, Liabilities Settled Asset Retirement Obligation, Liabilities Settled ARO Assets [Axis] ARO Assets [Axis] ARO Assets [Axis] Inventory, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Scenario, Unspecified Scenario [Domain] Description of the Business Nature of Operations [Text Block] Reconciliation of net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Customer Advances and Deposits, Current Customer Advances and Deposits, Current Major Property Class [Axis] Major Property Class [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Deferred income taxes Deferred Income Tax Expense (Benefit) Natural Gas Exchanges [Policy Text Block] Natural Gas Exchanges Policy [Text Block] Disclosure of accounting policy related to recorded delivery imbalances for natural gas exchanges.