Derivative Instruments and Hedging Activities - AOCI Rollforward (Details) gal in Millions	3 Months Ended
	Oct. 31, 2022 USD ($) gal	Oct. 31, 2021 USD ($)
Derivative [Line Items]
Partners' capital balance, beginning	$ (887,811,000)	$ (823,079,000)
Change in value of risk management commodity derivatives	(36,185,000)	72,932,000
Reclassification of (gains) losses on commodity hedges to cost of sales - propane and other gas liquids sales, net	(12,788,000)	(22,610,000)
Partners' capital balance, ending	(957,069,000)	(847,711,000)
Reclassification of net gain to earnings during next 12 months	11,300,000
Gain (loss) on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring, net	$ 0	0
Number of barrels of propane covered by cash flow hedges | gal	3.6
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member]
Derivative [Line Items]
Partners' capital balance, beginning	$ 37,907,000	88,866,000
Change in value of risk management commodity derivatives	(36,185,000)	72,932,000
Reclassification of (gains) losses on commodity hedges to cost of sales - propane and other gas liquids sales, net	(12,788,000)	(22,610,000)
Less: amount attributable to noncontrolling interests	495,000	(509,000)
Partners' capital balance, ending	(10,571,000)	138,679,000
Non-Controlling Interest [Member]
Derivative [Line Items]
Partners' capital balance, beginning	(7,587,000)	(7,966,000)
Partners' capital balance, ending	(8,287,000)	(7,702,000)
Ferrellgas, L.P
Derivative [Line Items]
Partners' capital balance, beginning	(887,826,000)	(806,143,000)
Change in value of risk management commodity derivatives	(36,185,000)	72,932,000
Reclassification of (gains) losses on commodity hedges to cost of sales - propane and other gas liquids sales, net	(12,788,000)	(22,610,000)
Partners' capital balance, ending	(957,083,000)	(830,084,000)
Ferrellgas, L.P | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member]
Derivative [Line Items]
Partners' capital balance, beginning	38,307,000	89,786,000
Change in value of risk management commodity derivatives	(36,185,000)	72,932,000
Reclassification of (gains) losses on commodity hedges to cost of sales - propane and other gas liquids sales, net	(12,788,000)	(22,610,000)
Partners' capital balance, ending	$ (10,666,000)	$ 140,108,000