Summary Of Significant Accounting Policies (Policy)	3 Months Ended
Summary Of Significant Accounting Policies (Policy)	Oct. 31, 2016
Significant Accounting Policies [Line Items]
Accounting estimates	Accounting estimates: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ from these estimates. Significant estimates impacting the consolidated financial statements include accruals that have been established for contingent liabilities, pending claims and legal actions arising in the normal course of business, useful lives of property, plant and equipment assets, residual values of tanks, capitalization of customer tank installation costs, amortization methods of intangible assets, valuation methods used to value sales returns and allowances, allowance for doubtful accounts, fair value of reporting units, recoverability of long-lived assets, assumptions used to value business combinations, fair values of derivative contracts and stock-based compensation calculations.
New Accounting Pronouncements	New accounting standards: FASB Accounting Standard Update No. 2014-09 In May 2014, the Financial Accounting Standards Board, ("FASB") issued Accounting Standard Update ("ASU") 2014-09, Revenue from Contracts with Customers. The issuance is part of a joint effort by the FASB and the International Accounting Standards Board ("IASB") to enhance financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards ("IFRS") and, thereby, improving the consistency of requirements, comparability of practices and usefulness of disclosures. The new standard will supersede much of the existing authoritative literature for revenue recognition. The standard and related amendments will be effective for Ferrellgas for its annual reporting period beginning August 1, 2018, including interim periods within that reporting period. Early application is not permitted. Entities are allowed to transition to the new standard by either recasting prior periods or recognizing the cumulative effect. Ferrellgas is currently evaluating the newly issued guidance, including which transition approach will be applied and the estimated impact it will have on the consolidated financial statements. FASB Accounting Standard Update No. 2015-02 and No. 2016-17 In February 2015, the FASB issued ASU 2015-02, Consolidation: Amendments to the Consolidation Analysis which provides additional guidance on the consolidation of limited partnerships and on the evaluation of variable interest entities. In October 2016, the FASB issued ASU 2016-17, Consolidation: Interests Held through Related Parties That Are Under Common Control which amended certain aspects of the additional guidance in ASU 2015-02. We adopted ASU 2015-02 and ASU 2016-17 effective August 1, 2016. The adoption of these standards did not impact our consolidated financial statements. FASB Accounting Standard Update No. 2015-11 In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330) - Simplifying the Measurement of Inventory, which requires that inventory within the scope of the guidance be measured at the lower of cost or net realizable value. ASU 2015-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, with early adoption permitted. We do not expect the adoption of this ASU to have a material impact on the consolidated financial statements. FASB Accounting Standard Update No. 2016-02 In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Ferrellgas is currently evaluating the impact of its pending adoption of ASU 2016-02 on the consolidated financial statements. FASB Accounting Standard Update No. 2016-13 In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) which requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. This standard is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Entities will apply the standard's provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. Ferrellgas is currently evaluating the impact of its pending adoption of this standard on the consolidated financial statements.
Ferrellgas, L.P. [Member]
Significant Accounting Policies [Line Items]
Accounting estimates	Accounting estimates: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ from these estimates. Significant estimates impacting the consolidated financial statements include accruals that have been established for contingent liabilities, pending claims and legal actions arising in the normal course of business, useful lives of property, plant and equipment assets, residual values of tanks, capitalization of customer tank installation costs, amortization methods of intangible assets, valuation methods used to value sales returns and allowances, allowance for doubtful accounts, fair value of reporting units, recoverability of long-lived assets, assumptions used to value business combinations, fair values of derivative contracts and stock-based compensation calculations.
New Accounting Pronouncements	New accounting standards: FASB Accounting Standard Update No. 2014-09 In May 2014, the Financial Accounting Standards Board, ("FASB") issued Accounting Standard Update ("ASU") 2014-09, Revenue from Contracts with Customers. The issuance is part of a joint effort by the FASB and the International Accounting Standards Board ("IASB") to enhance financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards ("IFRS") and, thereby, improving the consistency of requirements, comparability of practices and usefulness of disclosures. The new standard will supersede much of the existing authoritative literature for revenue recognition. The standard and related amendments will be effective for Ferrellgas for its annual reporting period beginning August 1, 2018, including interim periods within that reporting period. Early application is not permitted. Entities are allowed to transition to the new standard by either recasting prior periods or recognizing the cumulative effect. Ferrellgas is currently evaluating the newly issued guidance, including which transition approach will be applied and the estimated impact it will have on the consolidated financial statements. FASB Accounting Standard Update No. 2015-02 and No. 2016-17 In February 2015, the FASB issued ASU 2015-02, Consolidation: Amendments to the Consolidation Analysis which provides additional guidance on the consolidation of limited partnerships and on the evaluation of variable interest entities. In October 2016, the FASB issued ASU 2016-17, Consolidation: Interests Held through Related Parties That Are Under Common Control which amended certain aspects of the additional guidance in ASU 2015-02. We adopted ASU 2015-02 and ASU 2016-17 effective August 1, 2016. The adoption of these standards did not impact our consolidated financial statements. FASB Accounting Standard Update No. 2015-11 In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330) - Simplifying the Measurement of Inventory, which requires that inventory within the scope of the guidance be measured at the lower of cost or net realizable value. ASU 2015-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, with early adoption permitted. We do not expect the adoption of this ASU to have a material impact on the consolidated financial statements. FASB Accounting Standard Update No. 2016-02 In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Ferrellgas, L.P. is currently evaluating the impact of our pending adoption of ASU 2016-02 on the consolidated financial statements. FASB Accounting Standard Update No. 2016-13 In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) which requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. This standard is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Entities will apply the standard's provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. Ferrellgas is currently evaluating the impact of its pending adoption of this standard on the consolidated financial statements.