Schedule II Valuation And Qualifying Accounts (Details) (Allowance For Doubtful Accounts [Member], USD $) In Thousands	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Balance at beginning of period	$ 5,010	$ 4,294	$ 5,977
Charged to cost / expenses	5,174	7,821	4,421
Other additions	1,966	420	961
Deductions (amounts charged-off)	(7,840)	(7,525)	(7,065)
Balance at end of period	4,310	5,010	4,294
Ferrellgas, L.P. And Subsidiaries [Member]
Balance at beginning of period	5,010	4,294	5,977
Charged to cost / expenses	5,174	7,821	4,421
Other additions	1,966	420	961
Deductions (amounts charged-off)	(7,840)	(7,525)	(7,065)
Balance at end of period	$ 4,310	$ 5,010	$ 4,294