Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Related Party Transaction [Line Items]
General and administrative expense	$ 10,872,000	$ 16,475,000	$ 34,267,000	$ 30,889,000
Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
General and administrative expense	10,872,000	16,475,000	34,267,000	30,889,000
Compensation And Benefits [Member]
Related Party Transaction [Line Items]
Operating expense	59,142,000	61,412,000	110,262,000	109,570,000
General and administrative expense	8,068,000	9,200,000	14,665,000	15,101,000
Compensation And Benefits [Member] | Ferrellgas, L.P. [Member]
Related Party Transaction [Line Items]
Operating expense	59,142,000	61,412,000	110,262,000	109,570,000
General and administrative expense	$ 8,068,000	$ 9,200,000	$ 14,665,000	$ 15,101,000