Document And Entity Information [Abstract] Document Information [Table] Legal Entity [Axis] Entity [Domain] Entity [Domain] FERRELLGAS PARTNERS FINANCE CORP. [Member] Ferrellgas Partners Finance Corp [Member] Ferrellgas Partners Finance Corp. [Member] Information pertaining to Ferrellgas LP, the Operating Partnership. Ferrellgas L P [Member] Ferrellgas, L.P. [Member] FERRELLGAS FINANCE CORP. [Member] Ferrellgas Finance Corp [Member] Ferrellgas Finance Corp. [Member] Document Information [Line Items] Document Type Document Type Document Period End Date Document Period End Date Entity Registrant Name Entity Registrant Name Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash - end of year Cash and cash equivalents - beginning of year Cash and cash equivalents Cash and cash equivalents and restricted cash Receivables, Net, Current Accounts and notes receivable, net Accounts and notes receivable, net Inventory, Net Inventories Inventories Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property, plant and equipment, net Property, plant and equipment, net Goodwill Goodwill, ending balance Goodwill, beginning balance Goodwill, net Goodwill, net Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Intangible assets net excluding goodwill Operating Lease, Right-of-Use Asset Operating lease, right-of-use assets Other Assets, Noncurrent Other assets, net Other assets, net Assets Total assets Equity Method Investments Investment in Ferrellgas, L.P. Liabilities and Equity [Abstract] LIABILITIES AND PARTNERS' CAPITAL (DEFICIT) Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Short-term Debt Short-term borrowings Notes Payable, Current Collateralized note payable Collateralized note payable Long-term Debt, Current Maturities Less: current portion of long-term debt Current portion of long-term debt Operating Lease, Liability, Current Current operating lease liabilities Other Liabilities, Current Other current liabilities Other current liabilities Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities Long-term debt Operating Lease, Liability, Noncurrent Operating lease liabilities Other Liabilities, Noncurrent Other liabilities Commitments and Contingencies Contingencies and commitments Partners' Capital [Abstract] Partners' capital (deficit) Limited Partners' Capital Account Common unitholders General Partners' Capital Account General partner unitholder Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Partners' Capital Total Ferrellgas Partners, L.P. partners' deficit Noncontrolling Interest in Limited Partnerships Noncontrolling interest Partners' Capital, Including Portion Attributable to Noncontrolling Interest Partners' capital balance, ending Partners' capital balance, beginning Total partners' capital (deficit) Liabilities and Equity Total liabilities and partners' capital (deficit) Total liabilities and partners' capital (deficit) Equity [Abstract] STOCKHOLDER'S EQUITY Common Stock, Value, Issued Common stock, $1.00 par value; 2,000 shares authorized; 1,000 shares issued and outstanding Additional Paid in Capital, Common Stock Additional paid in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Stockholders' equity balance Stockholders' equity balance Total stockholder's equity Restricted Cash Restricted cash Pledged Assets Separately Reported, Finance Receivables Pledged as Collateral, at Fair Value Accounts receivable pledged as collateral Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts Limited Partners' Capital Account, Units Outstanding Common unitholders, units outstanding General Partners' Capital Account, Units Outstanding General partner unitholder, units outstanding Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common stock shares outstanding Income Statement [Abstract] Products and Services [Axis] Products And Services [Domain] Products and Services [Domain] Public Utilities Inventory Propane [Member] Propane [Member] Midstream Operations [Member] Midstream Operations [Member] Midstream Operations [Member] Product And Service Other [Member] Other Revenues Revenues [Abstract] Revenues: Revenue, Net Revenues Cost of Revenue [Abstract] Costs and expenses: Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization Cost of sales Other Cost and Expense, Operating Operating expense - personnel, vehicle, plant and other Operating Lease, Expense Operating expense - equipment lease expense Operating Leases, Rent Expense Equipment lease expense, preadoption Depreciation, Depletion and Amortization Depreciation and amortization expense General and Administrative Expense General and administrative expense General and administrative expense Employee Stock Ownership Plan (ESOP), Compensation Expense Non-cash employee stock ownership plan compensation charge Asset Impairment Charges Asset impairments Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Loss on asset sales and disposals Operating Income (Loss) Operating income Interest Expense, Debt Interest expense Gain (Loss) on Extinguishment of Debt Loss on extinguishment of debt Loss on extinguishment of debt Nonoperating Income (Expense) Other income (expense), net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Loss before income taxes Income Tax Expense (Benefit) Income tax expense (benefit) Income tax expense Income (Loss) from Equity Method Investments Equity in earnings (loss) of Ferrellgas, L.P. Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Net loss Net Income (Loss) Attributable to Noncontrolling Interest Net loss attributable to noncontrolling interest Net Income (Loss) Attributable to Parent Net loss Net earnings (loss) Net Income (Loss) Allocated to General Partners Less: General partner's interest in net loss Net Income (Loss) Allocated to Limited Partners Common unitholders' interest in net earnings (loss) Common unitholders' interest in net loss Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax Basic and diluted net loss per common unit Distributions Per Limited Partnership Unit Outstanding Cash distributions declared or paid per unit Statement of Comprehensive Income [Abstract] Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Change in value on risk management derivatives Change in value of derivative Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Change in value on risk management derivatives, pre-adoption Change in value of derivative, pre-adoption Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Reclassification of losses on derivatives to earnings, net Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Reclassification of losses on derivatives to earnings, net, pre-adoption Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Pension liability adjustment Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: comprehensive loss attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss attributable to Ferrellgas Partners, LP Statement of Partners' Capital [Abstract] Partner Type [Axis] Partner Type Of Partners Capital Account Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] Limited Partner [Member] Common Unitholders [Member] General Partner [Member] General Partner [Member] Partner Capital Components [Axis] Partner Capital Components [Domain] Partner Capital Components [Domain] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) Parent [Member] Parent [Member] Noncontrolling Interest [Member] Non-Controlling Interest [Member] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Accumulated deficit [Member] Increase (Decrease) in Partners' Capital [Roll Forward] Increase (Decrease) in Partners' Capital [Roll Forward] Partners' Capital Account, Units Partners' capital balance (in shares) Partners' capital balance (in shares) Partners' Capital Account, Unit-based Compensation Contributions in connection with non-cash ESOP and stock and unit-based compensation charges Partners' Capital Account, Distributions Distributions Distributions paid Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Shares, Outstanding Stockholders' equity balance (in shares) Stockholders' equity balance (in shares) Adjustments to Additional Paid in Capital, Other Capital contribution Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Reconciliation of net loss to net cash provided by operating activities: Reconciliation of net earnings to net cash used in operating activities: Share-based Compensation Non-cash stock and unit-based compensation charge Write off of Deferred Debt Issuance Cost Non-cash write-offs of unamortized debt discount and related capitalized debt costs Loss on extinguishment of debt, noncash Unrealized Gain (Loss) on Derivatives Unrealized gain on derivative instruments Provision for Doubtful Accounts Provision for doubtful accounts Deferred Income Tax Expense (Benefit) Deferred expense Deferred income tax expense (benefit) Business Exit Costs Business Exit Costs Exit costs associated with contracts Other Noncash Income (Expense) Other Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Equity in (earnings) loss of Ferrellgas, L.P. Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of effects from business acquisitions: Increase (Decrease) in Accounts and Notes Receivable Accounts and notes receivable, net of securitization Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Interest Payable, Net Accrued interest expense Increase (Decrease) in Other Current Liabilities Other current liabilities Increase (Decrease) in Other Noncurrent Liabilities Other assets and liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Businesses, Net of Cash Acquired Business acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Payments to Acquire Property, Plant, and Equipment Capital expenditures Proceeds from Sale of Productive Assets Proceeds from sale of assets Payments to Acquire Equipment on Lease Cash payments to construct assets in connection with future lease transactions The cash inflow attributable to equipment on lease. Proceeds From Equipment On Lease Cash receipts in connection with leased vehicles Payments for (Proceeds from) Other Investing Activities Other Proceeds from Equity Method Investment, Distribution Distributions received from Ferrellgas, L.P. Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Payments of Capital Distribution Distributions Distributions Proceeds from Contributed Capital Capital contribution Proceeds from Issuance of Long-term Debt Proceeds from issuance of long-term debt Repayments of Long-term Debt Payments on long-term debt Reductions on long-term debt Proceeds from (Repayments of) Short-term Debt Net additions to (reductions in) short-term borrowings Proceeds from Other Short-term Debt Net additions to (reductions in) collateralized short-term borrowings Payments of Financing Costs Cash paid for financing costs and other Payments to Noncontrolling Interests Noncontrolling interest activity The amount of cash outflow (inflow) from advances to (from) related parties, classified as financing activities. Advances (To) From Related Parties Net changes in advances with consolidated entities Finance Lease, Principal Payments Cash payments for principal portion of lease liability Financing cash flows, financing leases Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Net cash provided by (used in) financing activities Cash and Cash Equivalents, Period Increase (Decrease) Increase (decrease) in cash and cash equivalents Increase (decrease) in cash and cash equivalents Partnership organization and formation [Abstract] Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Nature of Operations [Text Block] Organization And Formation Summary of Significant Accounting Policies [Abstract] Summary of Significant Accounting Policies [Abstract] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies Significant Accounting Policies [Text Block] Summary Of Significant Accounting Policies Leases [Abstract] The entire disclosure of information about leases. Lease Disclosure [Text Block] Leases Business Combinations [Abstract]