Supplemental Financial Statement Information (Shipping And Handling Expenses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	$ 59,962	$ 53,153	$ 110,982	$ 101,968
Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	59,962	53,153	110,982	101,968
Operating Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	54,755	48,260	100,733	92,161
Operating Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	54,755	48,260	100,733	92,161
Depreciation And Amortization Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	1,440	1,400	2,855	2,927
Depreciation And Amortization Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	1,440	1,400	2,855	2,927
Equipment Lease Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	3,767	3,493	7,394	6,880
Equipment Lease Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	$ 3,767	$ 3,493	$ 7,394	$ 6,880