Segment Reporting Segment Reporting (Schedule of Capital Expenditure Information, by Segment) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2015
Segment Reporting Information [Line Items]
Capital Expenditures	$ 27,133
Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	23,197
Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	3,260
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	676
Maintenance Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	9,899
Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	8,873
Maintenance Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	350
Maintenance Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	676
Growth Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	17,234
Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	14,324
Growth Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	2,910
Growth Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	0
Ferrellgas, L.P. [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	27,133
Ferrellgas, L.P. [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	23,197
Ferrellgas, L.P. [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	3,260
Ferrellgas, L.P. [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	676
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	9,899
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	8,873
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	350
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	676
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	17,234
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	14,324
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	2,910
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	$ 0