Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Related Party Transaction [Line Items]
General and administrative expense	$ 16,475,000	$ 12,717,000	$ 30,889,000	$ 23,872,000
Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
General and administrative expense	16,475,000	12,717,000	30,889,000	23,872,000
Compensation And Benefits [Member]
Related Party Transaction [Line Items]
Operating expense	61,412,000	53,594,000	109,570,000	101,378,000
General and administrative expense	9,200,000	7,183,000	15,101,000	13,456,000
Compensation And Benefits [Member] | Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
Operating expense	61,412,000	53,594,000	109,570,000	101,378,000
General and administrative expense	$ 9,200,000	$ 7,183,000	$ 15,101,000	$ 13,456,000