Debt (Components Of Long-Term Debt) (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Schedule of Capitalization, Long-term Debt [Line Items]
Total long-term debt	$ 1,295,837,000	$ 1,110,031,000
Less: current portion, included in other current liabilities on the consolidated balance sheets	3,623,000	3,091,000
Long-term debt	1,292,214,000	1,106,940,000
Short-term borrowings	69,519,000	50,054,000
Interest Paid	90,820,000	84,030,000	88,696,000
Ferrellgas, L.P. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Total long-term debt	1,113,837,000	928,031,000
Less: current portion, included in other current liabilities on the consolidated balance sheets	3,623,000	3,091,000
Long-term debt	1,110,214,000	924,940,000
Short-term borrowings	69,519,000	50,054,000
Interest Paid	75,121,000	68,334,000	72,999,000
Fixed Rate Nine Point One Two Five Percentage Due Two Thousand Seventeen [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	0	297,444,000
Debt instrument, fixed interest rate	9.125%
Debt instrument, maturity year	2017
Unamortized discount	0	2,556,000
Fixed Rate Nine Point One Two Five Percentage Due Two Thousand Seventeen [Member] | Ferrellgas, L.P. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	0	297,444,000
Debt instrument, fixed interest rate	9.125%
Debt instrument, maturity year	2017
Unamortized discount	0	2,556,000
Fixed Rate Six Point Five Zero Due Two Thousand Twenty One [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	500,000,000	500,000,000
Debt instrument, fixed interest rate	6.50%
Debt instrument, maturity year	2021
Fixed Rate Six Point Five Zero Due Two Thousand Twenty One [Member] | Ferrellgas, L.P. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	500,000,000	500,000,000
Debt instrument, fixed interest rate	6.50%
Debt instrument, maturity year	2021
Fixed Rate Six Point Seven Five Due Two Thousand twenty Two [Domain]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	480,863,000	0
Debt instrument, fixed interest rate	6.75%
Debt Instrument, Maturity Date	Nov. 01, 2022
Debt Instrument, Unamortized Premium	5,863,000	0
Fixed Rate Six Point Seven Five Due Two Thousand twenty Two [Domain] | Ferrellgas, L.P. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	480,863,000	0
Debt instrument, fixed interest rate	6.75%
Debt Instrument, Maturity Date	Nov. 01, 2022
Debt Instrument, Unamortized Premium	5,863,000	0
Fixed Rate Eight Point Six Two Five Due Two Thousand Twenty [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	182,000,000	182,000,000
Debt instrument, fixed interest rate	8.625%
Debt instrument, maturity year	2020
Interest Rate Swap [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	(2,534,000)	(1,657,000)
Interest Rate Swap [Member] | Ferrellgas, L.P. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Senior notes	(2,534,000)	(1,657,000)
Secured Credit Facility [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Line of credit facility	123,781,000	121,346,000
Debt Instrument, Maturity Date	Oct. 01, 2018
Debt instrument, maturity year	2018
Short-term borrowings	69,519,000	50,054,000
Weighted average interest rate of debt	3.40%	3.70%
Write off of Deferred Debt Issuance Cost	300,000
Secured Credit Facility [Member] | Ferrellgas, L.P. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Line of credit facility	123,781,000	121,346,000
Debt Instrument, Maturity Date	Oct. 01, 2018
Debt instrument, maturity year	2018
Short-term borrowings	69,519,000	50,054,000
Weighted average interest rate of debt	3.40%	3.70%
Write off of Deferred Debt Issuance Cost	300,000
Notes Payable [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Notes payable	11,727,000	10,898,000
Unamortized discount	2,239,000	2,392,000
Weighted average interest rate of debt	8.80%	9.10%
Long-term debt, Notes payable due start	2014
Long-term debt, Notes payable due end	2022
Notes Payable [Member] | Ferrellgas, L.P. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Notes payable	11,727,000	10,898,000
Unamortized discount	$ 2,239,000	$ 2,392,000
Weighted average interest rate of debt	8.80%	9.10%
Long-term debt, Notes payable due start	2014
Long-term debt, Notes payable due end	2022