Segment Reporting Segment Reporting (Schedule of Capital Expenditure Information, by Segment) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2015
Segment Reporting Information
Capital Expenditures	$ 48,516
Propane and related equipment sales [Member]
Segment Reporting Information
Capital Expenditures	39,967
Midstream Operations [Member]
Segment Reporting Information
Capital Expenditures	7,537
Corporate and Other [Member]
Segment Reporting Information
Capital Expenditures	1,012
Maintenance Capital Expenditures [Member]
Segment Reporting Information
Capital Expenditures	14,827
Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information
Capital Expenditures	12,839
Maintenance Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information
Capital Expenditures	976
Maintenance Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information
Capital Expenditures	1,012
Growth Capital Expenditures [Member]
Segment Reporting Information
Capital Expenditures	33,689
Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information
Capital Expenditures	27,128
Growth Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information
Capital Expenditures	6,561
Growth Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information
Capital Expenditures	0
Ferrellgas, L.P. [Member]
Segment Reporting Information
Capital Expenditures	48,516
Ferrellgas, L.P. [Member] | Propane and related equipment sales [Member]
Segment Reporting Information
Capital Expenditures	39,967
Ferrellgas, L.P. [Member] | Midstream Operations [Member]
Segment Reporting Information
Capital Expenditures	7,537
Ferrellgas, L.P. [Member] | Corporate and Other [Member]
Segment Reporting Information
Capital Expenditures	1,012
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member]
Segment Reporting Information
Capital Expenditures	14,827
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information
Capital Expenditures	12,839
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information
Capital Expenditures	976
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information
Capital Expenditures	1,012
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member]
Segment Reporting Information
Capital Expenditures	33,689
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]
Segment Reporting Information
Capital Expenditures	27,128
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Midstream Operations [Member]
Segment Reporting Information
Capital Expenditures	6,561
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Corporate and Other [Member]
Segment Reporting Information
Capital Expenditures	$ 0