Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $)	9 Months Ended
	Apr. 30, 2014 MMBbls	Apr. 30, 2013
Derivative [Line Items]
Reclassification of net gain to earnings during next 12 months	$ 8,200,000
Number of barrels of propane covered by cash flow hedges	1,300,000
Derivative amount of credit risk	10,300,000
Derivative net liability position aggregate fair value	0
Collateral already posted	0
Gain or loss in earnings related to hedge ineffectiveness	0	0
Components of financial derivative contract gains or losses excluded from the assessment of hedge effectiveness	0	0
Reclassification of gain (loss) to earnings from discontinuance of cash flow hedges	0	0
Ferrellgas, L.P. [Member]
Derivative [Line Items]
Reclassification of net gain to earnings during next 12 months	8,200,000
Number of barrels of propane covered by cash flow hedges	1,300,000
Derivative amount of credit risk	10,300,000
Derivative net liability position aggregate fair value	0
Collateral already posted	0
Gain or loss in earnings related to hedge ineffectiveness	0	0
Components of financial derivative contract gains or losses excluded from the assessment of hedge effectiveness	0	0
Reclassification of gain (loss) to earnings from discontinuance of cash flow hedges	$ 0	$ 0