Derivative Instruments and Hedging Activities (Cash Flow Hedge Derivative Effect on Comprehensive Income) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
6 Months Ended |
Jan. 31, 2016 |
Jan. 31, 2015 |
Jan. 31, 2016 |
Jan. 31, 2015 |
| Amount of gain (loss) recognized in AOCI |
$ (11,504)
|
$ (45,127)
|
$ (11,120)
|
$ (59,024)
|
| Amount of gain (loss) reclassified from AOCI into income |
(8,567)
|
(7,360)
|
(16,793)
|
(6,232)
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
(199)
|
0
|
(199)
|
| Ferrellgas, L.P. [Member] |
|
|
|
|
| Amount of gain (loss) recognized in AOCI |
(11,504)
|
(45,127)
|
(11,120)
|
(59,024)
|
| Amount of gain (loss) reclassified from AOCI into income |
(8,567)
|
(7,360)
|
(16,793)
|
(6,232)
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
(199)
|
0
|
(199)
|
| Propane commodity derivatives [Member] |
|
|
|
|
| Amount of gain (loss) recognized in AOCI |
(10,760)
|
(42,910)
|
(9,175)
|
(55,668)
|
| Amount of gain (loss) reclassified from AOCI into income |
|
|
(15,262)
|
(6,232)
|
| Propane commodity derivatives [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Amount of gain (loss) recognized in AOCI |
(10,760)
|
(42,910)
|
(9,175)
|
(55,668)
|
| Amount of gain (loss) reclassified from AOCI into income |
|
|
(15,262)
|
(6,232)
|
| Interest Rate Swap [Member] |
|
|
|
|
| Amount of gain (loss) recognized in AOCI |
(744)
|
(2,217)
|
(1,945)
|
(3,356)
|
| Interest Rate Swap [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Amount of gain (loss) recognized in AOCI |
(744)
|
(2,217)
|
(1,945)
|
(3,356)
|
| Cost of Product Sold [Member] | Propane commodity derivatives [Member] |
|
|
|
|
| Amount of gain (loss) reclassified from AOCI into income |
(7,813)
|
(7,360)
|
(15,262)
|
(6,232)
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
0
|
0
|
0
|
| Cost of Product Sold [Member] | Propane commodity derivatives [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Amount of gain (loss) reclassified from AOCI into income |
(7,813)
|
(7,360)
|
(15,262)
|
(6,232)
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
0
|
0
|
0
|
| Interest Expense [Member] | Propane commodity derivatives [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
(199)
|
0
|
(199)
|
| Interest Expense [Member] | Interest Rate Swap [Member] |
|
|
|
|
| Amount of gain (loss) reclassified from AOCI into income |
(754)
|
0
|
(1,531)
|
0
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net |
0
|
(199)
|
0
|
(199)
|
| Interest Expense [Member] | Interest Rate Swap [Member] | Ferrellgas, L.P. [Member] |
|
|
|
|
| Amount of gain (loss) reclassified from AOCI into income |
$ (754)
|
$ 0
|
$ (1,531)
|
$ 0
|