Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $)	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Related Party Transaction [Line Items]
General and administrative expense	$ 23,395,000	$ 14,414,000
Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
General and administrative expense	23,395,000	14,414,000
Compensation And Benefits [Member]
Related Party Transaction [Line Items]
Operating expense	51,120,000	48,158,000
General and administrative expense	6,597,000	5,901,000
Compensation And Benefits [Member] | Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
Operating expense	51,120,000	48,158,000
General and administrative expense	$ 6,597,000	$ 5,901,000