Derivative Instruments and Hedging Activities (Narrative) (Details)
MMBbls in Thousands |
3 Months Ended |
6 Months Ended |
|
Jan. 31, 2016
USD ($)
|
Jan. 31, 2015
USD ($)
|
Jan. 31, 2016
USD ($)
MMBbls
|
Jan. 31, 2015
USD ($)
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
$ 0
|
$ (199,000)
|
$ 0
|
$ (199,000)
|
| Reclassification of net gain to earnings during next 12 months |
|
|
$ 21,600,000
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
3,100
|
|
| Additional Collateral, Aggregate Fair Value |
0.0
|
|
$ 0.0
|
|
| Derivative amount of credit risk |
|
|
0
|
|
| Derivative net liability position aggregate fair value |
0
|
|
0
|
|
| Collateral already posted |
0
|
|
0
|
|
| Gain or loss in earnings related to hedge ineffectiveness |
|
|
0
|
0
|
| Reclassification of gain (loss) to earnings from discontinuance of cash flow hedges |
|
|
0
|
0
|
| Ferrellgas, L.P. [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
(199,000)
|
0
|
(199,000)
|
| Reclassification of net gain to earnings during next 12 months |
|
|
$ 21,600,000
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
3,100
|
|
| Additional Collateral, Aggregate Fair Value |
0
|
|
$ 0
|
|
| Derivative amount of credit risk |
|
|
0
|
|
| Derivative net liability position aggregate fair value |
0
|
|
0
|
|
| Collateral already posted |
0
|
|
0
|
|
| Gain or loss in earnings related to hedge ineffectiveness |
|
|
0
|
0
|
| Reclassification of gain (loss) to earnings from discontinuance of cash flow hedges |
|
|
$ 0
|
0
|
| Diesel fuel [Member] |
|
|
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
200
|
|
| Diesel fuel [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
200
|
|
| Unleaded gasoline [Member] |
|
|
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
41
|
|
| Unleaded gasoline [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
41
|
|
| Crude Oil [Member] |
|
|
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
400
|
|
| Crude Oil [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Number of barrels of propane covered by cash flow hedges | MMBbls |
|
|
400
|
|
| Propane commodity derivatives [Member] | Interest Expense [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
(199,000)
|
$ 0
|
(199,000)
|
| Interest Rate Swap [Member] | Interest Expense [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
$ 0
|
$ (199,000)
|
$ 0
|
$ (199,000)
|