Supplemental Financial Statement Information (Shipping And Handling Expenses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	$ 53,608	$ 54,559	$ 164,590	$ 156,527
Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	53,608	54,559	164,590	156,527
Operating Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	47,967	49,633	148,700	141,794
Operating Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	47,967	49,633	148,700	141,794
Depreciation And Amortization Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	1,492	1,371	4,347	4,298
Depreciation And Amortization Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	1,492	1,371	4,347	4,298
Equipment Lease Expense [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	4,149	3,555	11,543	10,435
Equipment Lease Expense [Member] | Ferrellgas, L.P. [Member]
Condensed Financial Statements, Captions [Line Items]
Shipping and handling expenses	$ 4,149	$ 3,555	$ 11,543	$ 10,435