Consolidated Statements Of Partners' Capital (Deficit) (USD $)	6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	$ (86,627,000)		$ (101,200,000)
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	17,029,000
Distributions	(80,803,000)
Issuance of common units in connection with acquisitions - value	1,530,000
Exercise of common unit options - value	108,000
Net earnings	36,066,000	41,047,000
Other comprehensive income	11,497,000	8,699,000
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	1,697,000		13,078,000
Other comprehensive income	11,381,000
Total Ferrellgas Partners, L.P. Partners' Capital (Deficit) [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	(87,596,000)		(102,023,000)
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	16,857,000
Distributions	(79,907,000)
Issuance of common units in connection with acquisitions - value	1,515,000
Exercise of common unit options - value	106,000
Net earnings	35,621,000
Other comprehensive income	11,381,000
Non-Controlling Interest [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	969,000		823,000
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	172,000
Distributions	(896,000)
Issuance of common units in connection with acquisitions - value	15,000
Exercise of common unit options - value	2,000
Net earnings	445,000
Other comprehensive income	116,000
Common Unitholders [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance (in units)	79,072,800		79,144,400
Partners' capital balance	(28,931,000)		(54,480,000)
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	16,689,000
Distributions	(79,108,000)
Issuance of common units in connection with acquisitions - units	62,600
Issuance of common units in connection with acquisitions - value	1,500,000	0
Exercise of common unit options -units	9,000
Exercise of common unit options - value	105,000
Net earnings	35,265,000
General Partner Unitholder [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance (in units)	798,700		799,400
Partners' capital balance	(60,362,000)		(60,621,000)
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	168,000
Distributions	(799,000)
Issuance of common units in connection with acquisitions - units	600
Issuance of common units in connection with acquisitions - value	15,000
Exercise of common unit options -units	100
Exercise of common unit options - value	1,000
Net earnings	356,000
Ferrellgas, L.P. [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	94,476,000		80,150,000
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	17,029,000
Distributions	(88,652,000)
Issuance of common units in connection with acquisitions - value	1,515,000
Contributions from partners	252,000
Net earnings	44,033,000	49,261,000
Other comprehensive income	11,497,000	8,699,000
Ferrellgas, L.P. [Member] | Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	1,728,000		13,225,000
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges
Distributions
Issuance of common units in connection with acquisitions - value
Contributions from partners
Net earnings
Other comprehensive income	11,497,000
Ferrellgas, L.P. [Member] | Common Unitholders [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	91,810,000		66,249,000
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	16,857,000
Distributions	(87,756,000)
Issuance of common units in connection with acquisitions - value	1,500,000	0
Contributions from partners	250,000
Net earnings	43,588,000
Other comprehensive income
Ferrellgas, L.P. [Member] | General Partner Unitholder [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners' capital balance	938,000		676,000
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	172,000
Distributions	(896,000)
Issuance of common units in connection with acquisitions - value	15,000
Contributions from partners	2,000
Net earnings	445,000
Other comprehensive income