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Equity (Deficit) - Ownership (Details) - shares
12 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Mar. 30, 2021
Capital Unit [Line Items]      
Limited partner unitholders, units outstanding     97,152,665
Minimum percentage ownership of outstanding common units resulting in non voting of owners 20.00%    
Ferrell Companies [Member]      
Capital Unit [Line Items]      
Limited partner unitholders, units outstanding 1,126,468 1,126,468  
James E. Ferrell [Member]      
Capital Unit [Line Items]      
Limited partner unitholders, units outstanding 238,172 238,172  
Ferrellgas Partners LP [Member]      
Capital Unit [Line Items]      
General partner ownership interest 2.00% 2.00%  
Ferrellgas Partners LP [Member] | Ferrell Companies [Member]      
Capital Unit [Line Items]      
Limited partner ownership interest 23.40%    
Ferrellgas, L.P. [Member]      
Capital Unit [Line Items]      
Limited partner ownership interest 98.00%    
Ferrell Companies [Member] | Ferrellgas Partners LP [Member]      
Capital Unit [Line Items]      
Limited partner ownership interest 23.00%    
FCI Trading Corp. [Member] | Ferrell Companies [Member]      
Capital Unit [Line Items]      
Limited partner unitholders, units outstanding 9,784    
Ferrell Propane, Inc. [Member] | Ferrell Companies [Member]      
Capital Unit [Line Items]      
Limited partner unitholders, units outstanding 2,560    
JEF Capital Management [Member] | James E. Ferrell [Member]      
Capital Unit [Line Items]      
Limited partner unitholders, units outstanding 237,942    
Ferrell Resources Holdings, Inc. [Member] | Ferrellgas Partners LP [Member] | James E. Ferrell [Member]      
Capital Unit [Line Items]      
Limited partner unitholders, units outstanding 230    
Ferrellgas Inc., General Partner [Member] | Ferrellgas Partners LP [Member]      
Capital Unit [Line Items]      
General partner ownership interest 1.00%    
Ferrellgas Inc., General Partner [Member] | Ferrellgas, L.P. [Member]      
Capital Unit [Line Items]      
General partner ownership interest 1.0101% 1.0101%  
Ferrellgas Partners LP [Member] | Ferrellgas, L.P. [Member]      
Capital Unit [Line Items]      
Limited partner ownership interest 99.00%