Subsequent Events Subsequent Events (Narrative) (Details) $ in Millions	Feb. 20, 2018 USD ($)
Number of rail cars sold	1,072
Proceeds from Sale of Property, Plant, and Equipment	$ 47.0
Ferrellgas, L.P. [Member]
Number of rail cars sold	1,072
Proceeds from Sale of Property, Plant, and Equipment	$ 47.0

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration