Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Jul. 31, 2013 subsidiary	Jul. 31, 2012	Jul. 31, 2011
Accounts receivable pledged as collateral	$ 130,025,000	$ 121,812,000
General partner ownership interest	1.00%
Revenue recognized over a straight-line basis, term	1 year
Non-cash compensation charges	13,545,000	8,843,000	13,488,000
Number of taxable subsidiaries	1
Other assets, net	42,444,000	43,320,000
Notes Payable, Current	82,000,000	74,000,000
Cumulative effect of change in accounting principle	0	0	1,255,000
Adjustments for New Accounting Pronouncement [Member]
Accounts receivable pledged as collateral			107,900,000
Other assets, net			600,000
Notes Payable, Current			47,000,000
Notes Receivable, Related Parties			44,900,000
Consolidated subsidiary retained interest derecognized			15,300,000
Cumulative effect of change in accounting principle			1,300,000
Ferrellgas, L.P. [Member]
Accounts receivable pledged as collateral	130,025,000	121,812,000
General partner ownership interest	1.00%
Revenue recognized over a straight-line basis, term	1 year
Non-cash compensation charges	13,545,000	8,843,000	13,488,000
Other assets, net	39,531,000	39,954,000
Notes Payable, Current	82,000,000	74,000,000
Cumulative effect of change in accounting principle	0	0	1,255,000
Ferrellgas, L.P. [Member] | Adjustments for New Accounting Pronouncement [Member]
Accounts receivable pledged as collateral			107,900,000
Other assets, net			600,000
Notes Payable, Current			47,000,000
Notes Receivable, Related Parties			44,900,000
Consolidated subsidiary retained interest derecognized			15,300,000
Cumulative effect of change in accounting principle			1,300,000
Minimum [Member]
Property, plant and equipment useful life	2 years
Intangible asset useful life	2 years
Minimum [Member] | Ferrellgas, L.P. [Member]
Property, plant and equipment useful life	2 years
Intangible asset useful life	2 years
Maximum [Member]
Property, plant and equipment useful life	30 years
Intangible asset useful life	15 years
Maximum [Member] | Ferrellgas, L.P. [Member]
Property, plant and equipment useful life	30 years
Intangible asset useful life	15 years
Ferrelgas Unit Option Plan [Member]
Number of shares authorized to be issued as options	1,350,000.00
Maximum number of units common units under the UOP officer or director of general partner may acquire	314,895
Term till award expiration	10 years
Non-cash compensation charges	4,000	8,000	13,000
Number of options granted	300,000
Ferrelgas Unit Option Plan [Member] | Ferrellgas, L.P. [Member]
Number of shares authorized to be issued as options	1,350,000.00
Maximum number of units common units under the UOP officer or director of general partner may acquire	314,895
Term till award expiration	10 years
Non-cash compensation charges	4,000	8,000	13,000
Number of options granted	300,000
Ferrelgas Unit Option Plan [Member] | Minimum [Member]
Award vesting period	1 year
Ferrelgas Unit Option Plan [Member] | Minimum [Member] | Ferrellgas, L.P. [Member]
Award vesting period	1 year
Ferrelgas Unit Option Plan [Member] | Maximum [Member]
Award vesting period	5 years
Ferrelgas Unit Option Plan [Member] | Maximum [Member] | Ferrellgas, L.P. [Member]
Award vesting period	5 years
Ferrell Companies, Inc. Incentive Compensation Plan [Member]
Number of shares authorized to be issued as options	9,250,000.00
Non-cash compensation charges	13,500,000	8,800,000	13,500,000
Stock options, percent to vest upon event	100.00%
Retirement age	65
Ferrell Companies, Inc. Incentive Compensation Plan [Member] | Ferrellgas, L.P. [Member]
Number of shares authorized to be issued as options	9,250,000.00
Non-cash compensation charges	$ 13,500,000	$ 8,800,000	$ 13,500,000
Stock options, percent to vest upon event	100.00%
Retirement age	65
Ferrell Companies, Inc. Incentive Compensation Plan [Member] | Minimum [Member]
Award vesting period	0 years
Term till award expiration	10 years
Ferrell Companies, Inc. Incentive Compensation Plan [Member] | Minimum [Member] | Ferrellgas, L.P. [Member]
Award vesting period	0 years
Term till award expiration	10 years
Ferrell Companies, Inc. Incentive Compensation Plan [Member] | Maximum [Member]
Award vesting period	12 years
Term till award expiration	15 years
Ferrell Companies, Inc. Incentive Compensation Plan [Member] | Maximum [Member] | Ferrellgas, L.P. [Member]
Award vesting period	12 years
Term till award expiration	15 years
Operating Partnership [Member]
General partner ownership interest	1.00%
Operating Partnership [Member] | Ferrellgas, L.P. [Member]
Number of taxable subsidiaries	4