Fair Value Measurements (Assets And Liabilities Fair Value Hierarchy) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
Interest rate swap assets	$ 2,101,000	$ 3,783,000
Commodity derivatives propane swap assets	7,006,000	2,532,000
Interest rate swap liabilities	(5,075,000)	(4,998,000)
Commodity derivatives propane swap liabilities	(83,000)	(907,000)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(6,400,000)	0
Ferrellgas, L.P. [Member]
Interest rate swap assets	2,101,000	3,783,000
Commodity derivatives propane swap assets	7,006,000	2,532,000
Interest rate swap liabilities	(5,075,000)	(4,998,000)
Commodity derivatives propane swap liabilities	(83,000)	(907,000)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(6,400,000)	0
Level 2 [Member]
Interest rate swap assets	2,101,000	3,783,000
Commodity derivatives propane swap assets	7,006,000	2,532,000
Interest rate swap liabilities	(5,075,000)	(4,998,000)
Commodity derivatives propane swap liabilities	(83,000)	(907,000)
Level 2 [Member] | Ferrellgas, L.P. [Member]
Interest rate swap assets	2,101,000	3,783,000
Commodity derivatives propane swap assets	7,006,000	2,532,000
Interest rate swap liabilities	(5,075,000)	(4,998,000)
Commodity derivatives propane swap liabilities	(83,000)	(907,000)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(6,400,000)
Fair Value, Inputs, Level 3 [Member] | Ferrellgas, L.P. [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	$ (6,400,000)