Supplemental Financial Statement Information - Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Jul. 31, 2018
Supplemental Financial Statement Information [Line Items]
Notes receivable, less current portion	$ 27,646	$ 27,491
Other	44,893	47,097
Other assets, net	72,539	74,588
Ferrellgas, L.P. [Member]
Supplemental Financial Statement Information [Line Items]
Notes receivable, less current portion	27,646	27,491
Other	44,893	47,097
Other assets, net	$ 72,539	$ 74,588

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date more than one year from the balance sheet date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_NotesAndLoansReceivableNetNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant