Segment Reporting Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Segment Reporting Information
Revenues	$ 379,542	$ 471,146
Costs and Expenses	350,523	422,247
Adjusted EBITDA	29,019	48,899
Propane and related equipment sales [Member]
Segment Reporting Information
Revenues	271,498	277,476
Costs and Expenses	237,014	241,877
Adjusted EBITDA	34,484	35,599
Midstream - Crude Oil Logistics [Member]
Segment Reporting Information
Revenues	106,327	189,373
Costs and Expenses	101,556	164,570
Adjusted EBITDA	4,771	24,803
Corporate and Other [Member]
Segment Reporting Information
Revenues	2,946	4,297
Costs and Expenses	13,831	15,800
Adjusted EBITDA	(10,885)	(11,503)
Intersegment Eliminations [Member]
Segment Reporting Information
Revenues	(1,229)	0
Costs and Expenses	(1,878)	0
Adjusted EBITDA	649	0
Ferrellgas, L.P. [Member]
Segment Reporting Information
Revenues	379,542	471,146
Costs and Expenses	350,523	422,247
Adjusted EBITDA	29,019	48,899
Ferrellgas, L.P. [Member] | Propane and related equipment sales [Member]
Segment Reporting Information
Revenues	271,498	277,476
Costs and Expenses	237,014	241,877
Adjusted EBITDA	34,484	35,599
Ferrellgas, L.P. [Member] | Midstream - Crude Oil Logistics [Member]
Segment Reporting Information
Revenues	106,327	189,373
Costs and Expenses	101,556	164,570
Adjusted EBITDA	4,771	24,803
Ferrellgas, L.P. [Member] | Corporate and Other [Member]
Segment Reporting Information
Revenues	2,946	4,297
Costs and Expenses	13,831	15,800
Adjusted EBITDA	(10,885)	(11,503)
Ferrellgas, L.P. [Member] | Intersegment Eliminations [Member]
Segment Reporting Information
Revenues	(1,229)	0
Costs and Expenses	(1,878)	0
Adjusted EBITDA	$ 649	$ 0