Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Accounts And Notes Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jul. 31, 2011
Accounts receivable pledged as collateral	$ 121,812	$ 112,509
Accounts receivable	5,788	51,104
Other	216	229
Less: Allowance for doubtful accounts	(3,812)	(4,310)
Accounts and notes receivable, net	124,004	159,532
Ferrellgas, L.P. [Member]
Accounts receivable pledged as collateral	121,812	112,509
Accounts receivable	5,788	51,104
Other	216	229
Less: Allowance for doubtful accounts	(3,812)	(4,310)
Accounts and notes receivable, net	$ 124,004	$ 159,532