Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $)	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Related Party Transaction [Line Items]
General and administrative expense	$ 14,414,000	$ 11,155,000
Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
General and administrative expense	14,414,000	11,155,000
Compensation And Benefits [Member]
Related Party Transaction [Line Items]
Operating expense	48,158,000	47,784,000
General and administrative expense	5,901,000	6,273,000
Compensation And Benefits [Member] | Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
Operating expense	48,158,000	47,784,000
General and administrative expense	$ 5,901,000	$ 6,273,000