Segment Reporting Segment Reporting (Reconciliation of Assets from Segment to Consolidated) (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
Statement [Line Items]
Assets	$ 1,572,270,000	$ 1,356,028,000
Propane and related equipment sales [Member]
Statement [Line Items]
Assets	1,400,603,000
Midstream Operations [Member]
Statement [Line Items]
Assets	136,116,000
Corporate and Other [Member]
Statement [Line Items]
Assets	35,551,000
Ferrellgas, L.P. [Member]
Statement [Line Items]
Assets	1,569,833,000	1,352,932,000
Ferrellgas, L.P. [Member] | Propane and related equipment sales [Member]
Statement [Line Items]
Assets	1,400,603,000
Ferrellgas, L.P. [Member] | Midstream Operations [Member]
Statement [Line Items]
Assets	136,116,000
Ferrellgas, L.P. [Member] | Corporate and Other [Member]
Statement [Line Items]
Assets	$ 33,114,000