XML 66 R49.htm IDEA: XBRL DOCUMENT v3.10.0.1
Partners' Deficit - General partner's commitment (Details) - USD ($)
$ in Millions
6 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Ferrellgas, L.P. [Member]    
Capital Unit [Line Items]    
General partner ownership interest 1.0101% 1.0101%
Ferrellgas [Member] | Ferrellgas Inc., General Partner [Member]    
Capital Unit [Line Items]    
General partner ownership interest 2.00% 2.00%
General Partner [Member]    
Capital Unit [Line Items]    
Non-cash contribution $ 0.1 $ 0.2
General Partner [Member] | Ferrellgas, L.P. [Member]    
Capital Unit [Line Items]    
Non-cash contribution $ 0.1 $ 0.1