Employee Benefits (Details) (USD $)	12 Months Ended
	Jul. 31, 2013 employee	Jul. 31, 2012	Jul. 31, 2011
Number of employees	0
Non-cash compensation charges	$ 15,769,000	$ 9,440,000	$ 10,157,000
Matching contributions	3,000,000	2,900,000	3,100,000
Other comprehensive income and other liabilities adjustment	300,000	38,000	200,000
Ferrellgas, L.P. [Member]
Number of employees	0
Non-cash compensation charges	15,769,000	9,440,000	10,157,000
Matching contributions	3,000,000	2,900,000	3,100,000
Other comprehensive income and other liabilities adjustment	$ 300,000	$ 38,000	$ 200,000