Segment Reporting Segment Reporting (Schedule of Capital Expenditure Information, by Segment) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Segment Reporting Information    
Capital Expenditures $ 60,450 $ 27,133
Propane and related equipment sales [Member]    
Segment Reporting Information    
Capital Expenditures 24,623 23,197
Midstream - Crude Oil Logistics [Member]    
Segment Reporting Information    
Capital Expenditures 26,638 0
Midstream Operations - Water Solutions [Member]    
Segment Reporting Information    
Capital Expenditures 8,673 3,260
Corporate and Other [Member]    
Segment Reporting Information    
Capital Expenditures 516 676
Maintenance Capital Expenditures [Member]    
Segment Reporting Information    
Capital Expenditures 9,299 9,899
Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]    
Segment Reporting Information    
Capital Expenditures 8,588 8,873
Maintenance Capital Expenditures [Member] | Midstream - Crude Oil Logistics [Member]    
Segment Reporting Information    
Capital Expenditures 0 0
Maintenance Capital Expenditures [Member] | Midstream Operations - Water Solutions [Member]    
Segment Reporting Information    
Capital Expenditures 195 350
Maintenance Capital Expenditures [Member] | Corporate and Other [Member]    
Segment Reporting Information    
Capital Expenditures 516 676
Growth Capital Expenditures [Member]    
Segment Reporting Information    
Capital Expenditures 51,151 17,234
Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]    
Segment Reporting Information    
Capital Expenditures 16,035 14,324
Growth Capital Expenditures [Member] | Midstream - Crude Oil Logistics [Member]    
Segment Reporting Information    
Capital Expenditures 26,638 0
Growth Capital Expenditures [Member] | Midstream Operations - Water Solutions [Member]    
Segment Reporting Information    
Capital Expenditures 8,478 2,910
Growth Capital Expenditures [Member] | Corporate and Other [Member]    
Segment Reporting Information    
Capital Expenditures 0 0
Ferrellgas, L.P. [Member]    
Segment Reporting Information    
Capital Expenditures 60,450 27,133
Ferrellgas, L.P. [Member] | Propane and related equipment sales [Member]    
Segment Reporting Information    
Capital Expenditures 24,623 23,197
Ferrellgas, L.P. [Member] | Midstream - Crude Oil Logistics [Member]    
Segment Reporting Information    
Capital Expenditures 26,638 0
Ferrellgas, L.P. [Member] | Midstream Operations - Water Solutions [Member]    
Segment Reporting Information    
Capital Expenditures 8,673 3,260
Ferrellgas, L.P. [Member] | Corporate and Other [Member]    
Segment Reporting Information    
Capital Expenditures 516 676
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member]    
Segment Reporting Information    
Capital Expenditures 9,299 9,899
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Propane and related equipment sales [Member]    
Segment Reporting Information    
Capital Expenditures 8,588 8,873
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Midstream - Crude Oil Logistics [Member]    
Segment Reporting Information    
Capital Expenditures 0 0
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Midstream Operations - Water Solutions [Member]    
Segment Reporting Information    
Capital Expenditures 195 350
Ferrellgas, L.P. [Member] | Maintenance Capital Expenditures [Member] | Corporate and Other [Member]    
Segment Reporting Information    
Capital Expenditures 516 676
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member]    
Segment Reporting Information    
Capital Expenditures 51,151 17,234
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Propane and related equipment sales [Member]    
Segment Reporting Information    
Capital Expenditures 16,035 14,324
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Midstream - Crude Oil Logistics [Member]    
Segment Reporting Information    
Capital Expenditures 26,638 0
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Midstream Operations - Water Solutions [Member]    
Segment Reporting Information    
Capital Expenditures 8,478 2,910
Ferrellgas, L.P. [Member] | Growth Capital Expenditures [Member] | Corporate and Other [Member]    
Segment Reporting Information    
Capital Expenditures $ 0 $ 0