Derivative Instruments and Hedging Activities - Balance Sheet (Details) - USD ($)	9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Jul. 31, 2021
Derivatives, Fair Value [Line Items]
Gain (loss) recognized due to ineffectiveness	$ 0	$ 0
Derivative Asset, Fair Value, Gross Asset	91,724,000		$ 94,244,000
Derivative Liability, Fair Value, Gross Liability	14,476,000		4,458,000
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap assets	78,787,000		78,001,000
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap liabilities	13,207,000		3,429,000
Other Assets, Net [Member]
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap assets	12,937,000		16,243,000
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap liabilities	1,269,000		1,029,000
Ferrellgas, L.P. [Member]
Derivatives, Fair Value [Line Items]
Gain (loss) recognized due to ineffectiveness	0	$ 0
Derivative Asset, Fair Value, Gross Asset	91,724,000		94,244,000
Derivative Liability, Fair Value, Gross Liability	14,476,000		4,458,000
Ferrellgas, L.P. [Member] | Price risk management asset
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap assets	78,787,000		78,001,000
Ferrellgas, L.P. [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap liabilities	13,207,000		3,429,000
Ferrellgas, L.P. [Member] | Other Assets, Net [Member]
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap assets	12,937,000		16,243,000
Ferrellgas, L.P. [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Commodity derivatives propane swap liabilities	$ 1,269,000		$ 1,029,000