Subsequent Events Subsequent Events (Details) (USD $)	0 Months Ended			0 Months Ended			9 Months Ended			9 Months Ended
	Jun. 09, 2014 Subsequent Event [Member]	May 03, 2014 Subsequent Event [Member]	May 01, 2014 Subsequent Event [Member]	Jun. 09, 2014 Ferrellgas, L.P. [Member] Subsequent Event [Member]	May 03, 2014 Ferrellgas, L.P. [Member] Subsequent Event [Member]	May 01, 2014 Ferrellgas, L.P. [Member] Subsequent Event [Member]	Apr. 30, 2014 Secured Credit Facility [Member]	Jul. 31, 2013 Secured Credit Facility [Member]	Jun. 09, 2014 Secured Credit Facility [Member] Subsequent Event [Member]	Apr. 30, 2014 Secured Credit Facility [Member] Ferrellgas, L.P. [Member]	Jul. 31, 2013 Secured Credit Facility [Member] Ferrellgas, L.P. [Member]	Jun. 09, 2014 Secured Credit Facility [Member] Ferrellgas, L.P. [Member] Subsequent Event [Member]	Apr. 30, 2014 Letter Of Credit [Member]	Apr. 30, 2014 Letter Of Credit [Member] Ferrellgas, L.P. [Member]
Subsequent Event [Line Items]
Business Acquisition, Effective Date of Acquisition		May 01, 2014			May 01, 2014
Business Combination, Consideration Transferred		$ 124,700,000			$ 124,700,000
Contingent consideration duration		2 years			2 years
Common stock, shares issued			2,000,000			2,000,000
Sale of Stock, Consideration Received on Transaction		50,000,000			50,000,000
Subsequent Event, Date	Jun. 06, 2014			Jun. 06, 2014
Line of Credit Facility, Maximum Borrowing Capacity							$ 500,000,000.0	$ 400,000,000.0	$ 600,000,000	$ 500,000,000.0	$ 400,000,000.0	$ 600,000,000	$ 200,000,000.0	$ 200,000,000.0
Maturity date							Oct. 20, 2018			Oct. 20, 2018