Consolidated Statements Of Earnings (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Operating Expense [Member]
Non-cash stock and unit-based compensation	$ 1.5	$ 0.6	$ 2.3	$ 1.3
Operating Expense [Member] | Ferrellgas, L.P. [Member]
Non-cash stock and unit-based compensation	1.5	0.6	2.3	1.3
General And Administrative Expense [Member]
Non-cash stock and unit-based compensation	4.4	2.5	8.0	4.9
General And Administrative Expense [Member] | Ferrellgas, L.P. [Member]
Non-cash stock and unit-based compensation	$ 4.4	$ 2.5	$ 8.0	$ 4.9