Transactions With Related Parties (Primarily Include Compensation And Benefits Paid To Employees Of The General Partner) (Details) (USD $)	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
General and administrative expense	$ 61,891,000	$ 51,772,000	$ 41,382,000
Ferrellgas, L.P. And Subsidiaries [Member] | Compensation And Benefits [Member]
Operating expense	206,276,000	224,974,000	217,374,000
General and administrative expense	26,777,000	24,620,000	23,801,000
Compensation And Benefits [Member]
Operating expense	206,276,000	224,974,000	217,374,000
General and administrative expense	26,777,000	24,620,000	23,801,000
Ferrellgas, L.P. And Subsidiaries [Member]
General and administrative expense	$ 61,891,000	$ 51,772,000	$ 41,382,000