Document And Entity Information (USD $)	12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended
	Jul. 31, 2012	Jan. 31, 2012	Aug. 31, 2012 Ferrellgas Partners, L.P. [Member]	Jul. 31, 2012 Ferrellgas Partners Finance Corp. [Member]	Aug. 31, 2012 Ferrellgas Partners Finance Corp. [Member]	Jul. 31, 2012 Ferrellgas Finance Corp. [Member]	Aug. 31, 2012 Ferrellgas Finance Corp. [Member]	Jul. 31, 2012 Ferrellgas, L.P. [Member]
Document Type	10-K			10-K		10-K		10-K
Amendment Flag	false			false		false		false
Document Period End Date	Jul. 31, 2012			Jul. 31, 2012		Jul. 31, 2012		Jul. 31, 2012
Document Fiscal Year Focus	2012			2012		2012		2012
Document Fiscal Period Focus	FY			FY		FY		FY
Entity Registrant Name	FERRELLGAS PARTNERS L P			FERRELLGAS PARTNERS FINANCE CORP		FERRELLGAS FINANCE CORP		FERRELLGAS L P
Entity Central Index Key	0000922358			0001012493		0000922360		0000922359
Current Fiscal Year End Date	--07-31			--07-31		--07-31		--07-31
Entity Filer Category	Large Accelerated Filer			Non-accelerated Filer		Non-accelerated Filer		Non-accelerated Filer
Entity Common Stock, Shares Outstanding			79,015,619		1,000		1,000
Entity Voluntary Filers	No			No		No		No
Entity Current Reporting Status	Yes			Yes		Yes		Yes
Entity Public Float		$ 897,101,276
Entity Well-known Seasoned Issuer	Yes			No		No		No
Trading Symbol	fgp