Partners' Capital (Narrative) (Details) (USD $)	6 Months Ended						0 Months Ended
	Jan. 31, 2014	Jan. 31, 2014 Ferrellgas, L.P. [Member]	Jan. 31, 2014 General Partner [Member]	Jan. 31, 2013 General Partner [Member]	Jan. 31, 2014 General Partner [Member] Ferrellgas, L.P. [Member]	Jan. 31, 2013 General Partner [Member] Ferrellgas, L.P. [Member]	Mar. 17, 2014 Subsequent Event [Member]	Feb. 27, 2014 Subsequent Event [Member]	Mar. 17, 2014 Subsequent Event [Member] Ferrellgas, L.P. [Member]	Feb. 27, 2014 Subsequent Event [Member] Ferrellgas, L.P. [Member]	Mar. 17, 2014 Subsequent Event [Member] Ferrellgas Partners [Member] Ferrellgas, L.P. [Member]	Mar. 17, 2014 Subsequent Event [Member] General Partner [Member]	Mar. 17, 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								Feb. 27, 2014		Feb. 27, 2014
Cash distributions to related parties											$ 40,000,000	$ 400,000	$ 400,000
Cash distributions declared per common unit								$ 0.50
Cash distributions payment date							Mar. 17, 2014		Mar. 17, 2014
General partner ownership interest	1.00%	1.00%	2.00%		1.0101%
Non-cash contributions			$ 300,000	$ 300,000	$ 200,000	$ 200,000