Supplemental Financial Statement Information (Shipping And Handling Expenses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	$ 212,635	$ 201,704	$ 197,289
Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	212,635	201,704	197,289
Operating Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	190,999	181,932	177,903
Operating Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	190,999	181,932	177,903
Depreciation And Amortization Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	5,829	5,744	6,545
Depreciation And Amortization Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	5,829	5,744	6,545
Equipment Lease Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	15,807	14,028	12,841
Equipment Lease Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	$ 15,807	$ 14,028	$ 12,841