Partners' Capital (Narrative) (Details) (USD $)	9 Months Ended						0 Months Ended
	Apr. 30, 2014	Apr. 30, 2014 Ferrellgas, L.P. [Member]	Apr. 30, 2014 General Partner [Member]	Apr. 30, 2013 General Partner [Member]	Apr. 30, 2014 General Partner [Member] Ferrellgas, L.P. [Member]	Apr. 30, 2013 General Partner [Member] Ferrellgas, L.P. [Member]	Jun. 13, 2014 Subsequent Event [Member]	May 22, 2014 Subsequent Event [Member]	May 22, 2014 Subsequent Event [Member]	Jun. 13, 2014 Subsequent Event [Member] Ferrellgas, L.P. [Member]	May 22, 2014 Subsequent Event [Member] Ferrellgas, L.P. [Member]	Jun. 13, 2014 Subsequent Event [Member] Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Jun. 13, 2014 Subsequent Event [Member] General Partner [Member]	Jun. 13, 2014 Subsequent Event [Member] General Partner [Member] Ferrellgas, L.P. [Member]
Capital Unit [Line Items]
Limited partner ownership interest	27.00%
Cash distribution declaration date									May 22, 2014		May 22, 2014
Cash distributions declared per common unit								$ 0.50
Cash distributions payment date							Jun. 13, 2014			Jun. 13, 2014
Cash distributions to related parties												$ 48,900,000	$ 410,000	$ 500,000
Non-cash contributions			$ 500,000	$ 400,000	$ 300,000	$ 200,000
General partner ownership interest	1.00%	1.00%	2.00%		1.0101%