Transactions With Related Parties (Primarily Include Compensation And Benefits Paid To Employees Of The General Partner) (Details) (USD $)	3 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
Related Party Transaction [Line Items]
General and administrative expense	$ 11,114,000	$ 11,264,000
Ferrellgas, L.P. And Subsidiaries [Member]
Related Party Transaction [Line Items]
General and administrative expense	11,114,000	11,264,000
Compensation And Benefits [Member]
Related Party Transaction [Line Items]
Operating expense	49,347,000	50,011,000
General and administrative expense	6,017,000	6,463,000
Compensation And Benefits [Member] | Ferrellgas, L.P. And Subsidiaries [Member]
Related Party Transaction [Line Items]
Operating expense	49,347,000	50,011,000
General and administrative expense	$ 6,017,000	$ 6,463,000