Employee Benefits (Details) (USD $)	12 Months Ended
	Jul. 31, 2014 employee	Jul. 31, 2013	Jul. 31, 2012
Number of employees	0
Non-cash employee stock ownership plan compensation charge	$ 21,789,000	$ 15,769,000	$ 9,440,000
Matching contributions	3,600,000	3,000,000	2,900,000
Other comprehensive income and other liabilities adjustment	300,000	300,000	0
Ferrellgas, L.P. [Member]
Number of employees	0
Non-cash employee stock ownership plan compensation charge	21,789,000	15,769,000	9,440,000
Matching contributions	3,600,000	3,000,000	2,900,000
Other comprehensive income and other liabilities adjustment	$ 300,000	$ 300,000	$ 0