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Subsequent Events	12 Months Ended
Subsequent Events	Jul. 31, 2012
Subsequent Events	Q. Subsequent events Ferrellgas has evaluated events and transactions occurring after the balance sheet date through the date Ferrellgas’ consolidated financial statements were issued, and concluded that there were no events or transactions occurring during this period that required recognition or disclosure in its financial statements.
Ferrellgas Partners Finance Corp. [Member]
Subsequent Events	D. Subsequent events The Finance Corp. has evaluated events and transactions occurring after the balance sheet date through the date the Finance Corp.’s consolidated financial statements were issued, and concluded that there were no events or transactions occurring during this period that required recognition or disclosure in its financial statements.
Ferrellgas, L.P. [Member]
Subsequent Events	P. Subsequent events Ferrellgas, L.P. has evaluated events and transactions occurring after the balance sheet date through the date Ferrellgas, L.P.’s consolidated financial statements were issued, and concluded that there were no events or transactions occurring during this period that required recognition or disclosure in its financial statements.
Ferrellgas Finance Corp. [Member]
Subsequent Events	D. Subsequent events The Finance Corp. has evaluated events and transactions occurring after the balance sheet date through the date the Finance Corp.’s consolidated financial statements were issued, and concluded that there were no events or transactions occurring during this period that required recognition or disclosure in its financial statements.