Summary Of Significant Accounting Policies (Significant Cash And Non-Cash Activities) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Interest	$ 44,799	$ 50,065
Income taxes	90	0
Common units issued in connection with acquisitions - value	1,326	1,658
Issuance of liabilities in connection with acquisitions	2,321	1,664
Property, plant and equipment additions	979	374
Ferrellgas, L.P. [Member]
Interest	36,951	37,990
Income taxes	89	0
Common units issued in connection with acquisitions - value	1,313
Issuance of liabilities in connection with acquisitions	2,321	1,664
Property, plant and equipment additions	979	374
Common Unitholders [Member]
Common units issued in connection with acquisitions - value	1,300	1,625
Common Unitholders [Member] | Ferrellgas, L.P. [Member]
Common units issued in connection with acquisitions - value	$ 1,300	$ 1,625