Consolidated Statements Of Cash Flows - USD ($)	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Cash flows from operating activities:
Net earnings (loss)	$ (54,501,000)	$ (672,035,000)	$ 30,089,000
Reconciliation of net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization expense	103,351,000	150,513,000	98,579,000
Non-cash employee stock ownership plan compensation charge	15,088,000	27,595,000	24,713,000
Non-cash stock and unit-based compensation charge	3,298,000	9,324,000	25,982,000
Asset Impairment Charges	0	658,118,000	0
Loss on disposal of assets	14,457,000	30,835,000	7,099,000
Unrealized Gain (Loss) on Derivatives	(2,895,000)	0	0
Change in fair value of contingent consideration	0	(100,000)	(6,300,000)
Provision for doubtful accounts	7,000	1,703,000	3,419,000
Deferred tax expense (benefit)	11,000	(504,000)	270,000
Other	7,933,000	4,967,000	3,361,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(5,394,000)	6,812,000	(1,739,000)
Inventories	(1,958,000)	5,788,000	49,050,000
Prepaid expenses and other current assets	12,041,000	17,961,000	(24,956,000)
Accounts payable	17,469,000	(14,924,000)	(1,547,000)
Accrued interest expense	2,048,000	(658,000)	5,099,000
Other current liabilities	12,975,000	(40,252,000)	10,754,000
Other liabilities	3,358,000	9,184,000	(20,801,000)
Net cash provided by (used in) operating activities	127,288,000	194,327,000	203,072,000
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(3,539,000)	(15,144,000)	(641,427,000)
Capital expenditures	(50,472,000)	(117,518,000)	(72,481,000)
Proceeds from sale of assets	8,510,000	17,089,000	5,905,000
Other	(37,000)	(286,000)	(14,000)
Net cash used in investing activities	(45,538,000)	(115,859,000)	(708,017,000)
Cash flows from financing activities:
Distributions	(79,733,000)	(204,160,000)	(167,105,000)
Proceeds from increase in long-term debt	230,864,000	168,117,000	628,134,000
Payments on long-term debt	(174,292,000)	(14,959,000)	(119,457,000)
Net additions to (reductions in) short-term borrowings	(41,510,000)	25,972,000	5,800,000
Net additions to collateralized short-term borrowings	(5,000,000)	(6,000,000)	(21,000,000)
Cash paid for financing costs	(6,078,000)	(1,214,000)	(10,301,000)
Noncontrolling interest activity	645,000	(2,693,000)	2,684,000
Payments for Repurchase of Common Stock	(15,851,000)	(46,432,000)	0
Proceeds from exercise of common unit options	0	182,000	91,000
Proceeds from equity offering, net of issuance costs of $648, $0 and $0 for the years ended July 31, 2014, 2013 and 2012, respectively	0	0	181,008,000
Cash contributions from partners in connection with common unit issuances	0	32,000	4,456,000
Net cash provided by (used in) financing activities	(80,955,000)	(81,155,000)	504,310,000
Effect of exchange rate changes on cash	0	0	(2,000)
Increase (decrease) in cash and cash equivalents	795,000	(2,687,000)	(637,000)
Cash and cash equivalents - beginning of year	4,965,000	7,652,000	8,289,000
Cash and cash equivalents - end of year	5,760,000	4,965,000	7,652,000
Ferrellgas Partners Finance Corp. [Member]
Cash flows from operating activities:
Net earnings (loss)	(5,308)	(2,262)	(2,348)
Reconciliation of net earnings (loss) to net cash provided by operating activities:
Deferred tax expense (benefit)	0	0	0
Changes in operating assets and liabilities, net of effects from business acquisitions:
Net cash provided by (used in) operating activities	(5,308)	(2,262)	(2,348)
Cash flows from financing activities:
Capital contribution	5,308	2,262	2,379
Net cash provided by (used in) financing activities	5,308	2,262	2,379
Increase (decrease) in cash and cash equivalents	0	0	31
Cash - beginning of year	1,000	1,000	969
Cash - end of year	1,000	1,000	1,000
Ferrellgas, L.P. [Member]
Cash flows from operating activities:
Net earnings (loss)	(29,059,000)	(655,391,000)	46,427,000
Reconciliation of net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization expense	103,351,000	150,513,000	98,579,000
Non-cash employee stock ownership plan compensation charge	15,088,000	27,595,000	24,713,000
Non-cash stock and unit-based compensation charge	3,298,000	9,324,000	25,982,000
Asset Impairment Charges	0	658,118,000	0
Loss on disposal of assets	14,457,000	30,835,000	7,099,000
Unrealized Gain (Loss) on Derivatives	(2,895,000)	0	0
Change in fair value of contingent consideration	0	(100,000)	(6,300,000)
Provision for doubtful accounts	7,000	1,703,000	3,419,000
Deferred tax expense (benefit)	11,000	(504,000)	270,000
Other	5,921,000	4,545,000	2,921,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(5,394,000)	6,528,000	(1,739,000)
Inventories	(1,958,000)	5,788,000	49,050,000
Prepaid expenses and other current assets	11,985,000	17,957,000	(24,934,000)
Accounts payable	17,469,000	(14,924,000)	(1,547,000)
Accrued interest expense	120,000	(658,000)	5,099,000
Other current liabilities	12,989,000	(37,769,000)	8,250,000
Other liabilities	3,358,000	9,184,000	(20,801,000)
Net cash provided by (used in) operating activities	148,748,000	212,744,000	216,488,000
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(3,539,000)	(15,144,000)	(78,927,000)
Capital expenditures	(50,472,000)	(117,518,000)	(72,481,000)
Proceeds from sale of assets	8,510,000	17,089,000	5,905,000
Other	(37,000)	(286,000)	(14,000)
Net cash used in investing activities	(45,538,000)	(115,859,000)	(145,517,000)
Cash flows from financing activities:
Distributions	(119,879,000)	(269,541,000)	(607,875,000)
Capital contribution	167,843,000	30,000	51,047,000
Proceeds from increase in long-term debt	62,864,000	168,117,000	628,134,000
Payments on long-term debt	(174,292,000)	(14,959,000)	(119,457,000)
Net additions to (reductions in) short-term borrowings	(41,510,000)	25,972,000	5,800,000
Net additions to collateralized short-term borrowings	5,000,000	(6,000,000)	(21,000,000)
Cash paid for financing costs	(2,425,000)	(1,214,000)	(10,301,000)
Net cash provided by (used in) financing activities	(102,399,000)	(97,595,000)	(73,652,000)
Effect of exchange rate changes on cash	0	0	(2,000)
Increase (decrease) in cash and cash equivalents	811,000	(710,000)	(2,683,000)
Cash and cash equivalents - beginning of year	4,890,000	5,600,000	8,283,000
Cash and cash equivalents - end of year	5,701,000	4,890,000	5,600,000
Ferrellgas Finance Corp. [Member]
Cash flows from operating activities:
Net earnings (loss)	(5,516)	(7,053)	(4,108)
Reconciliation of net earnings (loss) to net cash provided by operating activities:
Deferred tax expense (benefit)	0	0	0
Changes in operating assets and liabilities, net of effects from business acquisitions:
Prepaid expenses and other current assets	0	1,500	0
Net cash provided by (used in) operating activities	(5,516)	(8,553)	(4,108)
Cash flows from financing activities:
Capital contribution	5,516	8,553	4,108
Net cash provided by (used in) financing activities	5,516	8,553	4,108
Increase (decrease) in cash and cash equivalents	0	0	0
Cash - beginning of year	1,100	1,100	1,100
Cash - end of year	$ 1,100	$ 1,100	$ 1,100