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Condensed Consolidated Statements of Earnings (Parenthetical) (USD $)
In Millions
3 Months Ended 9 Months Ended
Apr. 30, 2011
Apr. 30, 2010
Apr. 30, 2011
Apr. 30, 2010
Ferrellgas, L.P. and Subsidiaries [Member] | Operating Expense [Member]
       
Non-cash stock and unit-based compensation $ 0.6 $ 0.3 $ 3.8 $ 1.2
Operating Expense [Member]
       
Non-cash stock and unit-based compensation 0.6 0.3 3.8 1.2
Ferrellgas, L.P. and Subsidiaries [Member] | General and Administrative Expense [Member]
       
Non-cash stock and unit-based compensation 1.0 0.7 9.9 3.0
General and Administrative Expense [Member]
       
Non-cash stock and unit-based compensation $ 1.0 $ 0.7 $ 9.9 $ 3.0