Supplemental Financial Statement Information (Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,238,618	$ 1,207,268
Less: accumulated depreciation	626,831	617,541
Property, plant and equipment, net	611,787	589,727
Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,238,618	1,207,268
Less: accumulated depreciation	626,831	617,541
Property, plant and equipment, net	611,787	589,727
Land [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	Indefinite
Property, plant and equipment, gross	31,890	30,978
Land [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	Indefinite
Property, plant and equipment, gross	31,890	30,978
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,812	12,021
Land Improvements [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,812	12,021
Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Property, plant and equipment, gross	68,492	67,050
Buildings And Improvements [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Property, plant and equipment, gross	68,492	67,050
Vehicles, Including Transport Trailers [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	95,701	101,224
Vehicles, Including Transport Trailers [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	95,701	101,224
Bulk Equipment And District Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	109,739	107,835
Bulk Equipment And District Facilities [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	109,739	107,835
Tanks, Cylinders And Customer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	772,402	767,365
Tanks, Cylinders And Customer Equipment [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	772,402	767,365
Salt water disposal wells [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	24,288	0
Salt water disposal wells [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	24,288	0
Computer And Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	116,265	117,718
Computer And Office Equipment [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	116,265	117,718
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,029	3,077
Construction In Progress [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,029	$ 3,077
Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Land Improvements [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Vehicles, Including Transport Trailers [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	8 years
Minimum [Member] | Vehicles, Including Transport Trailers [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	8 years
Minimum [Member] | Bulk Equipment And District Facilities [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Minimum [Member] | Bulk Equipment And District Facilities [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Minimum [Member] | Tanks, Cylinders And Customer Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Tanks, Cylinders And Customer Equipment [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Salt water disposal wells [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Salt water disposal wells [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Computer And Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minimum [Member] | Computer And Office Equipment [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Maximum [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Maximum [Member] | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Maximum [Member] | Land Improvements [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Maximum [Member] | Vehicles, Including Transport Trailers [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Maximum [Member] | Vehicles, Including Transport Trailers [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Maximum [Member] | Bulk Equipment And District Facilities [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Maximum [Member] | Bulk Equipment And District Facilities [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Maximum [Member] | Tanks, Cylinders And Customer Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Maximum [Member] | Tanks, Cylinders And Customer Equipment [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Maximum [Member] | Salt water disposal wells [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	23 years
Maximum [Member] | Salt water disposal wells [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	23 years
Maximum [Member] | Computer And Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Maximum [Member] | Computer And Office Equipment [Member] | Ferrellgas, L.P. [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years