Document and Entity Information [Abstract] Document Information [Table] Legal Entity [Axis] Entity [Domain] Ferrellgas Partners Finance Corp. Ferrellgas Partners Finance Corp. [Member] Ferrellgas, L.P. Ferrellgas, L.P. [Member] Ferrellgas Finance Corp. Ferrellgas Finance Corp. [Member] Document Information [Line Items] Document Type Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Written Communications Soliciting Material Pre-commencement Tender Offer Pre-commencement Issuer Tender Offer Title of 12(b) Security No Trading Symbol Flag Entity Emerging Growth Company Entity Central Index Key Amendment Flag