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Unregulated propane and natural gas costs Unregulated Energy And Other Cost Of Sales Unregulated energy and other cost of sales Uncollateralized Senior Note Due August Two Thousand Thirty Nine [Member] Uncollateralized Senior Note Due August Two Thousand Thirty Nine [Member] Uncollateralized Senior Note Due August Two Thousand Thirty Nine [Member] [Member] Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Total stockholders’ equity Stockholders' Equity Attributable to Parent Beginning Balances Ending Balances Equity, Attributable to Parent Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Identifiable Assets Assets [Abstract] Shares Issued Price Per Share - At The Market Shares Issued Price Per Share - At The Market Shares Issued Price Per Share - At The Market Common Stock Shares Issued At The Market Common Stock Shares Issued At The Market Common Stock Shares Issued At The Market Short-Term Borrowing [Abstract] Short-Term Borrowing [Abstract] Short-Term Borrowing [Abstract] Accounts Receivable, Allowance for Credit Loss, Current Allowance for uncollectible accounts Accounts Receivable, Allowance for Credit Loss, Current Deferred income taxes Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit) Regulatory assets Regulatory Asset, Current Energy Marketing Contracts Assets, Total Energy Marketing Contracts Assets, Total Energy Marketing Contracts Assets, Total Total [Member] Total [Member] Total [Member] Winter Haven Florida [Member] Winter Haven Florida [Member] Winter Haven Florida [Member] Accrued revenue Accrued Revenue Accrued revenue. Maryland Division [Member] Maryland Division [Member] Maryland Division [Member] Entity Central Index Key Entity Central Index Key J.T. Lee and Son's J.T. Lee and Son's [Member] J.T. Lee and Son's Less: Accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization 5.68% note, due June 30, 2026 [Member] Uncollateralized Senior Note Due On Two Thousand Twenty Six [Member] Uncollateralized senior note due on 2026. Additional paid-in capital Additional Paid in Capital, Common Stock Note Purchase Agreement Note Purchase Agreement [Member] Note Purchase Agreement Equity [Abstract] Equity [Abstract] Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Fort Meade and Indiantown Divisions [Member] Fort Meade and Indiantown Divisions [Member] Fort Meade and Indiantown [Member] Strike Prices Propane Put Options [Domain] Strike Prices Propane Put Options [Domain] [Domain] for Strike Prices Propane Put Options [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Derivatives designated as hedging instrument [Member] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Business Combination, Recognized Asset Acquired, Other Asset, Current Business Combination, Recognized Asset Acquired, Other Asset, Current 3.88% note, due May 15, 2029 [Member] Uncollateralized 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Inventory, Propane Gas East Coast Reinforcement Projects: New Smyrna Beach East Coast Reinforcement Projects: New Smyrna Beach [Member] East Coast Reinforcement Projects: New Smyrna Beach Net gain, net of tax of $28, $28, $53 and $55, respectively Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Uncollateralized Senior Note Due MM YYYY Uncollateralized Senior Notes Aggregate [Member] Uncollateralized Senior Notes Aggregate Manufactured Gas Plant [Member] Manufactured Gas Plant [Member] Manufactured Gas Plant [Member] Unregulated Energy Cost of Sales Unregulated Energy Cost of Sales Unregulated Energy Cost of Sales Debt Instrument, Fee Debt Instrument, Fee Operating Revenues, Unaffiliated Customers [Member] Operating Segments [Member] Del-Mar Pathway Project [Member] Del-Mar Pathway Project [Member] Del-Mar Pathway Project [Member] Deferred Pension Settlement Expense Deferred Pension Settlement Expense Deferred Pension Settlement Expense Business Combination, Recognized Liability Assumed, Liability Business Combination, Recognized Liability Assumed, Liability Share-Based Compensation Share-Based Payment Arrangement [Text Block] Sandpiper [Member] Sandpiper [Member] Sandpiper [Member] Sandpiper [Member] Reconciliation of Numerator: Reconciliation Of Numerator [Abstract] Reconciliation of numerator: Deferred investment tax credits and other liabilities Other Liabilities, Noncurrent Goodwill Goodwill Proceeds from the sale of discontinued operations Proceeds from Divestiture of Businesses, Incremental Proceeds from Divestiture of Businesses, Incremental Retained Earnings [Member] Retained Earnings [Member] Operating Lease, Liability, Noncurrent Operating Lease, Liability, Noncurrent Total Operating Expenses Operating Expenses Revolving Credit Facility Revolving Credit Facility [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll 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And Liabilities Assumed Regulatory Liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Regulatory Liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Regulatory Liabilities Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Environmental Commitments And Contingencies [Table] Environmental Commitments And Contingencies [Table] Environmental Commitments And Contingencies [Table] Gain on sale of discontinued operations Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax, Incremental Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax, Incremental Requested Interim Rates Requested Interim Rates Requested Interim Rates Unrealized Gain (Loss) On Cash Flow Hedging Instruments, Tax Unrealized Gain (Loss) On Cash Flow Hedging Instruments, Tax Unrealized Gain (Loss) On Cash Flow Hedging Instruments, Tax Increase (Decrease) in Interest Payable, Net Increase (Decrease) in Interest Payable, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales FPU Electric Distribution [Member] FPU Electric Distribution [Member] FPU Electric Distribution [Member] Permanent Rates Permanent Rates Permanent Rates Increase (Decrease) in Other Current Liabilities Increase (Decrease) in Other Current Liabilities Debt Service Coverage Ratio Measurement Period Debt Service Coverage Ratio Measurement Period Debt Service Coverage Ratio Measurement Period Other RNG Other RNG [Member] Other RNG Chesapeake Postretirement Plan [Member] Chesapeake Postretirement Plan [Member] Chesapeake postretirement plan. 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Other Commitments [Axis] Other Commitments [Axis] Sharp Energy Inc [Member] Sharp Energy Inc [Member] Sharp Energy Inc [Member] Change in cash overdrafts due to outstanding checks Increase (Decrease) in Outstanding Checks, Financing Activities Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Maintenance Operating Costs and Expenses Revolving Line of Credit, 5 year Revolving Line of Credit, 5 year Revolving Line of Credit, 5 year Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Total Operating Revenues Revenues Total operating revenues, unaffiliated customers Revenues Number of Miles of Transmission Pipe Number of Miles of Transmission Pipe Number of Miles of Transmission Pipe Accounts payable and other accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Other Cost of Sales Other Cost of Sales Other Cost of Sales Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] Florida Public Utilities Company [Member] FPU [Member] Florida Public Utilities Company [Member] Florida public utilities company. 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Shares awarded to non-employee directors [Line Items] Shares awarded to non-employees [Line Items] Shares awarded to non-employee directors Regulatory Liability, Amortization Period Regulatory Liability, Amortization Period Treasury stock Treasury Stock, Value Treasury Stock, Value Planet Found Planet Found [Member] Planet Found Customer deposits and refunds Increase (Decrease) in Contract with Customer, Liability 3.73% note, due December 16, 2028 [Member] Uncollateralized Senior Note Two Due on December Two Thousand Twenty Eight [Member] Uncollateralized Senior Note Due on December Two Thousand Twenty Eight [Member] Purchases and adjustments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) COVID-19 Effect [Policy Text Block] COVID-19 Effect [Policy Text Block] COVID-19 Effect [Policy Text Block] Eastern Shore and Peninsula Pipeline [Member] Eastern Shore and Peninsula Pipeline [Member] Eastern Shore and Peninsula Pipeline [Member] Bridge Loan Bridge Loan Long-term debt including current maturities Total long-term debt Long-Term Debt Stock Issued During Period, Shares, Dividend Reinvestment Plan Stock Issued During Period, Shares, Dividend Reinvestment Plan FCG Interim Rate Relief FCG Interim Rate Relief FCG Interim Rate Relief 3.48% note, due May 31, 2038 [Member] Uncollateralized Senior Note Due on Two Thousand Thirty Eight [Member] Uncollateralized Senior Note Due on Two Thousand Thirty Eight [Member] Ocean City Maryland Reinforcement Ocean City Maryland Reinforcement [Member] Ocean City Maryland Reinforcement Changes in assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Security Exchange Name Security Exchange Name Uncollateralized Senior Note Due January Two Thousand Thirty Seven Uncollateralized Senior Note Due January Two Thousand Thirty Seven [Member] Uncollateralized Senior Note Due January Two Thousand Thirty Seven New York Life [Member] New York Life [Member] New York Life [Member] Derivative liabilities, at fair value Energy Marketing Contract Liabilities, Current Energy Marketing Contract Liabilities, Current Energy Marketing Contract Liabilities, Current Effect of dilutive securities: Effect Of Dilutive Securities [Abstract] Effect of dilutive securities. 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Note Due On May 2 Two Thousand Twenty Eight [Member] Uncollateralized Senior Note Due On May Two Thousand Twenty Eight Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Taxes Payable, Current Taxes Payable, Current Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Reclassification out of Accumulated Other 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Propane Swap Agreement [Member] Propane Swap Agreement [Member] Propane Swap Agreement [Member] Propane inventory, storage gas and other inventory Increase (Decrease) in Inventories Increase (Decrease) in Inventories Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Defined Benefit Plan Actuarial Gain Loss, Net Settlement Defined Benefit Plan Actuarial Gain Loss, Net Settlement Defined Benefit Plan Actuarial Gain Loss, Net Settlement Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year Segment Reporting [Table] Segment Reporting [Table] Uncollateralized Senior Note Due July Two Thousand Thirty Five Uncollateralized Senior Note Due July Two Thousand Thirty Five [Member] Uncollateralized Senior Note Due July Two Thousand Thirty Five Uncollateralized Senior Note Due December 2030 Uncollateralized Senior Note Due December 2030 [Member] Uncollateralized Senior Note Due December 2030 Other Investments Other Investments - Mutual funds and Other [Member] Other Investments - Mutual funds and Other Committed Line of Credit Facility Four [Member] Committed Line of Credit Facility Four [Member] Committed Line of Credit Facility Four [Member] Lease, Cost [Table Text Block] Lease, Cost [Table Text Block] Other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Guarantee Type [Axis] Guarantee Type [Axis] Guarantee Type Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Current Fiscal Year End Date Current Fiscal Year End Date Florida City Gas Florida City Gas [Member] Florida City Gas Lease, Cash Flow [Table Text Block] Lease, Cash Flow [Table Text Block] Lease, Cash Flow [Table Text Block] Derivative [Line Items] Derivative [Line Items] Common Stock, Dividends, Per Share, Declared Dividend declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Share-based compensation and tax benefit Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Committed Line of Credit Facility Seven [Member] Committed Line of Credit Facility Seven [Member] Committed Line of Credit Facility Seven [Member] Intrinsic value of the SICP awards Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Acquisitions - 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Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Central Florida Gas Division [Member] Central Florida Gas Division [Member] Central Florida Gas Division [Member] Environmental Commitments and Contingencies [Abstract] Environmental Commitments and Contingencies [Abstract] Environmental Commitments and Contingencies [Abstract] Shares awarded to key employees and non-employee directors [Table] Shares awarded to non-employee directors [Table] Shares awarded to non-employee directors [Table] Summary of Accounting Policies Significant Accounting Policies [Text Block] Unregulated Energy [Member] Unregulated Energy [Member] Unregulated energy. Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Business Combination, Preacquisition Contingency, Settlement, Amount Business Combination, Preacquisition Contingency, Settlement, Amount Central Florida Reinforcement Projects Central Florida Reinforcement Projects: Lake Mattie [Member] Central Florida Reinforcement Projects: Lake Mattie Total before tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Environmental and other commitments and contingencies (Notes 5 and 6) Commitments and Contingencies Net gain, tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Elkton Gas [Member] Elkton Gas [Member] Elkton Gas [Member] Total property, plant and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Miami Loop Miami Loop [Member] Miami Loop MetLife [Member] MetLife [Member] MetLife [Member] Interest Rate Credit Adjustment Interest Rate Credit Adjustment Interest Rate Credit Adjustment Other Commitments [Table] Other Commitments [Table] Seaford [Member] Seaford [Member] Seaford [Member] Eastern Shore Gas Company [Member] Eastern Shore Gas Company [Member] Eastern shore Gas Company. Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Segment Reporting, Other Segment Item, Amount Segment Reporting, Other Segment Item, Amount Fees on Equity Issuance - At The Market Fees on Equity Issuance - At The Market Fees on Equity Issuance - At The Market Entity Tax Identification Number Entity Tax Identification Number Ratio of Indebtedness to Net Capital Ratio of Indebtedness to Net Capital Deferred Charges and Other Assets Deferred Charges And Other Assets [Abstract] Deferred Charges and Other Assets. Other Commitments [Line Items] Other Commitments [Line Items] Less: tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Other accrued liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Share-based compensation Share-Based Payment Arrangement, Noncash Expense Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Regulatory assets - noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Regulatory assets - noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Regulatory assets - noncurrent Derivative Liabilities [Member] Mark To Market Energy Liabilities [Member] Mark to market energy liabilities. Realized loss on commodity contracts and sale of assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Fair Values of Derivative Contracts Recorded in Condensed Consolidated Balance Sheet Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic (in dollars per share) Basic Earnings Per Share (in dollars per share) Earnings Per Share, Basic Lease Disclosure [Abstract] Lease Disclosure [Abstract] Lease Disclosure [Abstract] Total current assets Assets, Current Assets, Current Total long-term debt, net of current maturities Long-Term Debt, Excluding Current Maturities Uncollateralized Senior Note Due December 2038 Uncollateralized Senior Note Due December 2038 [Member] Uncollateralized Senior Note Due December 2038 Trade and other receivables Trade and other receivables Accounts Receivable, after Allowance for Credit Loss, Current Depreciation Study Impact Depreciation Study Impact Depreciation Study Impact Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument, Unused Borrowing Capacity, Amount Schedule of Maturities of Leases [Table Text Block] Schedule of Maturities of Leases [Table Text Block] Schedule of Maturities of Leases[Table Text Block] Business Combination, Contingent Consideration, Liability Business Combination, Contingent Consideration, Liability Uncollateralized Senior Notes Issued August 2025 Uncollateralized Senior Notes Issued August 2025 [Member] Uncollateralized Senior Notes Issued August 2025 Cover [Abstract] Cover [Abstract] Extent of Customers Losing Service Extent of Customers Losing Service Extent of Customers Losing Service Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] (Deprecated 2025) Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] (Deprecated 2025) Uncollateralized Senior Note Due August Two Thousand Thirty Five Uncollateralized Senior Note Due August Two Thousand Thirty Five [Member] Uncollateralized Senior Note Due August Two Thousand Thirty Five Short-term Debt, Weighted Average Interest Rate, at Point in Time Short-Term Debt, Weighted Average Interest Rate, at Point in Time Accelerated Vested Shares [Member] Accelerated Vested Shares [Member] Accelerated Vested Shares [Member] Total periodic cost Periodic Cost Benefit Periodic Cost Benefit Energy Transmission [Member] Energy Transmission [Member] Energy Transmission [Member] Natural gas distribution operations [Member] Natural gas distribution operations [Member] Natural gas distribution operations [Member] Construction Work in Progress Construction Work in Progress Construction Work in Progress Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share Proceeds from Issuance of Senior Long-Term Debt Proceeds from Issuance of Senior Long-Term Debt Plan Name [Axis] Plan Name [Axis] Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Other income, net Other expense, net Other Nonoperating Income (Expense) Long-Term Debt Long-Term Debt [Text Block] Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Reconciliation of Denominator: Reconciliation Of Denominator [Abstract] Reconciliation of denominator. Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Regulatory Liabilities Regulatory Liability Treasury Stock [Member] Treasury Stock [Member] (Deprecated 2023) Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer. Hedging Designation [Domain] Hedging Designation [Domain] Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] Defined Benefit Plans And Other Postretirement Benefit Plans [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Uncollateralized Senior Notes Due On October 2029 Uncollateralized Senior Notes Due On October 2029 [Member] Uncollateralized Senior Notes Due On October 2029 Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Equipment Security Note Equipment Security Note [Member] Equipment Security Note Accounts payable Accounts Payable, Current Interest Rate Swap Rate, High Range [Member] Interest Rate Swap Rate, High Range [Member] Interest Rate Swap Rate, High Range [Member] Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, to be Paid, Year Five Acquisitions - Additional Information [Table] Acquisitions - Additional Information [Table] Acquisitions - Additional Information [Table] Financing Length [Domain] Financing Length [Domain] Financing Length [Domain] Business Combination, Consideration Transferred Business Combination, Consideration Transferred Entity Filer Category Entity Filer Category Environmental costs recovered Environmental Remediation Expense, Recovery Other Segments And Intersegments Eliminations [Member] Other and eliminations [Member] Other Segments And Intersegments Eliminations [Member] Other segments and intersegments eliminations. 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Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Short-term Short-term [Member] Short-term Environmental Commitments And Contingencies [Line Items] Environmental Commitments And Contingencies [Line Items] Environmental Commitments And Contingencies [Line Items] Current Assets Assets, Current [Abstract] Retirement savings plan and dividend reinvestment plan (shares) Stock Issued During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan Stock Issued During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan Net loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Entity Address, Address Line One Entity Address, Address Line One Number of Mainline Pipeline Miles Number of Mainline Pipeline Miles Number of Mainline Pipeline Miles Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income taxes Tax benefit Income Tax Expense (Benefit) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expirations Weighted Average Grant Date Fair Value Expired (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expirations Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award equity instruments other than options expirations weighted average grant date fair value. Propane Delivery [Member] Propane Delivery [Member] Propane Delivery [Member] Base Rate Increase Base - SAFE investments transfer to base rates Base Rate Increase Base - SAFE investments transfer to base rates Base Rate Increase Base - to transfer the SAFE investments from a rider clause to base rates Treasury Stock, Preferred Treasury Stock, Preferred [Member] FASB Statements and Other Authoritative Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Derivative assets, at fair value Energy Marketing Contracts Assets, Current Energy Marketing Contracts Assets, Current Less: debt issuance costs Unamortized Debt Issuance Expense West Palm Beach Florida [Member] West Palm Beach Florida [Member] West Palm Beach Florida. Statement [Table] Statement [Table] Regulatory liabilities Regulatory Liability, Current Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax (Deprecated 2025) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax (Deprecated 2025) Summary of Effects of Federal Tax Reform on Regulated Businesses [Table Text Block] Summary of Effects of Federal Tax Reform on Regulated Businesses [Table Text Block] Summary of Effects of Federal Tax Reform on Regulated Businesses [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Ratio based on average number of prior quarters Ratio based on average number of prior quarters Ratio based on average number of prior quarters Leases, Weighted Average Remaining Lease Term [Table Text Block] Leases, Weighted Average Remaining Lease Term [Table Text Block] [Table Text Block] for Lease, Weighted Average Remaining Lease Term [Table] Contract with Customer, Asset and Liability [Table Text Block] Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Committed Line of Credit Facility Eight [Member] Committed Line of Credit Facility Eight [Member] Committed Line of Credit Facility Eight [Member] Net borrowings under line of credit agreements Proceeds from (Repayments of) Lines of Credit Uncollateralized Senior Note Due December 2033 Uncollateralized Senior Note Due December 2033 [Member] Uncollateralized Senior Note Due December 2033 Swap Sales Swap Sales [Member] Swap Sales Florida Electric Distribution Florida Electric Distribution [Member] Florida Electric Distribution Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]