Consolidated Statements Of Earnings (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Operating Expense [Member]
Non-cash stock and unit-based compensation	$ 1.2	$ 0.4	$ 3.5	$ 1.7
Operating Expense [Member] | Ferrellgas, L.P. [Member]
Non-cash stock and unit-based compensation	1.2	0.4	3.5	1.7
General And Administrative Expense [Member]
Non-cash stock and unit-based compensation	4.7	1.8	12.7	6.7
General And Administrative Expense [Member] | Ferrellgas, L.P. [Member]
Non-cash stock and unit-based compensation	$ 4.7	$ 1.8	$ 12.7	$ 6.7