Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Schedule of Derivative Collateral) (Details) - USD ($)
$ in Thousands |
Jan. 31, 2016 |
Jul. 31, 2015 |
| Derivative Asset, Fair Value of Collateral |
$ 31,269
|
$ 29,795
|
| Derivative Liability, Fair Value of Collateral |
0
|
15
|
| Ferrellgas, L.P. [Member] |
|
|
| Derivative Asset, Fair Value of Collateral |
31,269
|
29,795
|
| Derivative Liability, Fair Value of Collateral |
0
|
15
|
| Other assets, net [Member] |
|
|
| Derivative Asset, Fair Value of Collateral |
12,483
|
11,786
|
| Other assets, net [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivative Asset, Fair Value of Collateral |
12,483
|
11,786
|
| Prepaid Expenses and Other Current Assets [Member] |
|
|
| Derivative Asset, Fair Value of Collateral |
18,786
|
18,009
|
| Prepaid Expenses and Other Current Assets [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivative Asset, Fair Value of Collateral |
18,786
|
18,009
|
| Other Current Liabilities [Member] |
|
|
| Derivative Liability, Fair Value of Collateral |
0
|
15
|
| Other Current Liabilities [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivative Liability, Fair Value of Collateral |
0
|
15
|
| Other Liabilities [Member] |
|
|
| Derivative Liability, Fair Value of Collateral |
0
|
0
|
| Other Liabilities [Member] | Ferrellgas, L.P. [Member] |
|
|
| Derivative Liability, Fair Value of Collateral |
$ 0
|
$ 0
|