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Consolidated Statements Of Earnings (Parenthetical) (USD $)
In Millions
12 Months Ended
Jul. 31, 2011
Jul. 31, 2010
Jul. 31, 2009
Ferrellgas, L.P. And Subsidiaries [Member] | Operating Expense [Member]
     
Non-cash stock and unit-based compensation $ 3.8 $ 2.2 $ 0.8
Ferrellgas, L.P. And Subsidiaries [Member] | General And Administrative Expense [Member]
     
Non-cash stock and unit-based compensation 9.7 5.7 1.5
Operating Expense [Member]
     
Non-cash stock and unit-based compensation 3.8 2.2 0.8
General And Administrative Expense [Member]
     
Non-cash stock and unit-based compensation $ 9.7 $ 5.7 $ 1.5