Asset impairments	12 Months Ended
Asset impairments	Jul. 31, 2017
Asset Impairment Charges [Text Block]	Asset impairments First Quarter ended October 31, 2015 Goodwill impairment During the three months ended October 31, 2015, Ferrellgas determined that the continued and prolonged decline in the price of crude oil constituted a triggering event for its Midstream operations - water solutions reporting unit that required an update to the goodwill impairment assessment as of October 31, 2015. The first step of this test primarily consists of a discounted future cash flow model to estimate fair value. The result of this first step is based on the following critical assumptions: (1) the NYMEX West Texas Intermediate (“WTI”) crude oil curve was used to estimate future oil prices; (2) the oil skimming rate was expected to increase or decrease consistent with the projected increases/decreases in the NYMEX WTI crude oil curve consistent with past history; and (3) certain organic growth projects were projected to increase the salt water volumes processed as new drilling activity increases associated with the projected NYMEX WTI crude oil curve. As noted in our discussion of this reporting unit in Ferrellgas' Annual Report on Form 10-K for the year ended July 31, 2015, Ferrellgas believes that the results of this business are closely tied to the price of WTI crude oil. The daily average closing price for WTI crude oil for the three months ended July 31, 2015 of $56.63 decreased 20.7% to $44.90 during the three months ended October 31, 2015. Additionally, the projected NYMEX WTI crude oil curve decreased approximately 6.5% from August 31, 2015 to October 31, 2015. These events have led to an overall decline in drilling activity and volumes in the Eagle Ford shale region of Texas. These market changes, in addition to previous declines noted during fiscal year 2015, negatively affected Ferrellgas' fiscal year 2016 results and future projections sufficiently to indicate that the fair value of the reporting unit likely no longer exceeded its carrying value. In the second step, the implied fair value of goodwill was determined by assigning the fair value of a reporting unit to all the assets and liabilities of that unit (including any unrecognized intangible assets) as if the reporting unit had been acquired in a business combination. If the carrying amount of reporting unit goodwill exceeded the implied fair value of that goodwill, an impairment loss was recognized for that excess. As of October 31, 2015, Ferrellgas performed the first step of the goodwill impairment test for the Midstream operations - water solutions reporting unit and determined that the carrying value of the reporting unit exceeded the fair value. Ferrellgas then completed the second step of the goodwill impairment analysis and compared the implied fair value of the reporting unit to the carrying amount of goodwill and determined that goodwill was completely impaired and wrote off the entire $29.3 million of goodwill related to this reporting unit. Fourth Quarter ended July 31, 2016 During the year ended July 31, 2016, approximately 60% of Bridger's gross margin was generated from its largest customer and Jamex, that customer's supplier, under take-or-pay arrangements. Bridger's largest customer during the fiscal year ended July 31, 2016 owned a refinery in Trainer, Pennsylvania. Bridger was party to an agreement with this customer under which Bridger provided logistics services to transport crude oil from the Bakken region in North Dakota to the Trainer refinery. That agreement had a minimum volume commitment and payment obligation from the refinery for logistics services associated with the delivery of 65 MBbls/d. However, if the quantity of crude oil delivered to the refinery dropped below 35 MBbls/d, the minimum volume commitment and payment obligation from the refinery would be suspended and Jamex would become responsible for payments to Bridger under the pay provisions of the Jamex TLA. During February 2016, Jamex ceased sourcing barrels for delivery to the refinery and Bridger had been billing Jamex directly in accordance with the pay provisions of the Jamex TLA. During July 2016, Ferrellgas determined Jamex would not resume sourcing barrels for delivery to the refinery or be likely to continue to make payments under the pay provisions of the Jamex TLA. As a result, Ferrellgas began negotiating a settlement with Jamex, and the Jamex TLA was terminated on September 1, 2016. While the agreement with the refinery owner was not terminated as a result of the execution and delivery of the Jamex Termination Agreement, Bridger was unable to negotiate a revised transportation and logistics agreement with that customer; accordingly it was unlikely that Bridger would continue to make any deliveries under the existing agreement. As of the date of this assessment, we did not anticipate any material contribution to revenue or gross margin from Jamex or Bridger's largest customer in the future. Additionally, the continued, sustained decline in crude oil prices and resulting decrease in crude oil production in the regions in which we operate significantly impacted our trucking operations during the three months ended July 31, 2016, a trend Ferrellgas anticipated would continue into fiscal 2017 and beyond. This expected decline in future cash flows from operations constituted a triggering event in the fourth fiscal quarter of 2016 for its Midstream operations - crude oil logistics reporting unit, requiring impairment testing of indefinite-lived intangible assets, long-lived tangible and intangible assets within certain asset groups, and goodwill. Tradename impairment Upon applying the fair-value-based test to its Midstream operations - crude oil logistics reporting unit indefinite-lived intangible asset, which consists of its tradename, Ferrellgas determined that the estimated fair value of the tradename as of July 31, 2016 was less than the carrying value, and as a result recorded an impairment charge of $7.4 million as of July 31, 2016. Ferrellgas estimated the fair value of the tradename using the relief from royalty method, which is an income approach. Critical assumptions included in the relief from royalty method include: (1) discounted future cash flows; (2) growth factors; (3) a discount rate; and (4) a long-term growth rate. The majority of these critical assumptions were unobservable, accordingly Ferrellgas' estimate of fair value of the tradename was considered to be Level 3 in the fair value hierarchy. Long-lived asset impairment Ferrellgas determined that multiple asset groups within the Midstream operations - crude oil logistics reporting unit were not recoverable. Ferrellgas estimated the fair value of each of these asset groups and recorded impairment charges to the extent that fair value was less than the carrying value of the asset group. As of July 31, 2016, impairment charges of $249.0 million related to customer relationships and non-compete agreements and $181.8 million related to property, plant and equipment are included in “Asset impairments” in the Consolidated Statement of Operations. Fair value of the asset groups was determined using an income approach, which was comprised of multiple significant unobservable inputs including: (1) estimate of future cash flows; (2) the timing, success rate and capital required for certain organic growth projects; (3) the amount of capital expenditures required to maintain the existing cash flows; and (4) a terminal period growth rate equal to the expected rate of inflation. Accordingly, Ferrellgas' estimates of fair value of these asset groups were considered to be Level 3 in the fair value hierarchy. Goodwill impairment Ferrellgas concluded that the fair value of the Midstream operations - crude oil logistics reporting unit no longer exceeded its carrying value as of July 31, 2016. Upon applying the second step of the impairment test, Ferrellgas determined that the implied fair value of goodwill was zero, and accordingly we recorded an impairment charge of $190.6 million as of July 31, 2016, or all of the goodwill previously allocated to this reporting unit. Ferrellgas used a discounted future cash flow model to estimate fair value of the reporting unit, which included multiple significant unobservable inputs, thus the estimate was considered to be Level 3 in the fair value hierarchy. Ferrellgas prepared various cash flow models involving certain potential scenarios and probability weighted these scenarios which included the following critical assumptions: (1) discounted future cash flows; (2) the timing, success rate and capital required for certain organic growth projects; (3) the amount of capital expenditures required to maintain the existing cash flows; and (4) a terminal period growth rate equal to the expected rate of inflation. In addition to these critical cash flow assumptions, a discount rate of 11.5% was applied to the various projected cash flow models. Judgments and assumptions are inherent in management’s estimates used to determine the fair value of Ferrellgas' reporting units and the fair value of its indefinite-lived assets and long-lived assets, and are consistent with what management believes would be utilized by primary market participants.
Ferrellgas, L.P. [Member]
Asset Impairment Charges [Text Block]	Asset impairments First Quarter ended October 31, 2015 Goodwill impairment During the three months ended October 31, 2015, Ferrellgas, L.P. determined that the continued and prolonged decline in the price of crude oil constituted a triggering event for its Midstream operations - water solutions reporting unit that required an update to the goodwill impairment assessment as of October 31, 2015. The first step of this test primarily consists of a discounted future cash flow model to estimate fair value. The result of this first step is based on the following critical assumptions: (1) the NYMEX West Texas Intermediate (“WTI”) crude oil curve was used to estimate future oil prices; (2) the oil skimming rate was expected to increase or decrease consistent with the projected increases/decreases in the NYMEX WTI crude oil curve consistent with past history; and (3) certain organic growth projects were projected to increase the salt water volumes processed as new drilling activity increases associated with the projected NYMEX WTI crude oil curve. As noted in our discussion of this reporting unit in Ferrellgas, L.P.'s Annual Report on Form 10-K for the year ended July 31, 2015, Ferrellgas, L.P. believes that the results of this business are closely tied to the price of WTI crude oil. The daily average closing price for WTI crude oil for the three months ended July 31, 2015 of $56.63 decreased 20.7% to $44.90 during the three months ended October 31, 2015. Additionally, the projected NYMEX WTI crude oil curve decreased approximately 6.5% from August 31, 2015 to October 31, 2015. These events have led to an overall decline in drilling activity and volumes in the Eagle Ford shale region of Texas. These market changes, in addition to previous declines noted during fiscal year 2015, negatively affected Ferrellgas, L.P.'s fiscal year 2016 results and future projections sufficiently to indicate that the fair value of the reporting unit likely no longer exceeded its carrying value. In the second step, the implied fair value of goodwill was determined by assigning the fair value of a reporting unit to all the assets and liabilities of that unit (including any unrecognized intangible assets) as if the reporting unit had been acquired in a business combination. If the carrying amount of reporting unit goodwill exceeded the implied fair value of that goodwill, an impairment loss was recognized for that excess. As of October 31, 2015, Ferrellgas, L.P. performed the first step of the goodwill impairment test for the Midstream operations - water solutions reporting unit and determined that the carrying value of the reporting unit exceeded the fair value. Ferrellgas, L.P. then completed the second step of the goodwill impairment analysis and compared the implied fair value of the reporting unit to the carrying amount of goodwill and determined that goodwill was completely impaired and wrote off the entire $29.3 million of goodwill related to this reporting unit. Fourth Quarter ended July 31, 2016 During the year ended July 31, 2016, approximately 60% of Bridger's gross margin was generated from its largest customer and Jamex, that customer's supplier, under take-or-pay arrangements. Bridger's largest customer during the fiscal year ended July 31, 2016 owned a refinery in Trainer, Pennsylvania. Bridger was party to an agreement with this customer under which Bridger provided logistics services to transport crude oil from the Bakken region in North Dakota to the Trainer refinery. That agreement had a minimum volume commitment and payment obligation from the refinery for logistics services associated with the delivery of 65 MBbls/d. However, if the quantity of crude oil delivered to the refinery dropped below 35 MBbls/d, the minimum volume commitment and payment obligation from the refinery would be suspended and Jamex would become responsible for payments to Bridger under the pay provisions of the Jamex TLA. During February 2016, Jamex ceased sourcing barrels for delivery to the refinery and Bridger had been billing Jamex directly in accordance with the pay provisions of the Jamex TLA. During July 2016, Ferrellgas, L.P. determined Jamex would not resume sourcing barrels for delivery to the refinery or be likely to continue to make payments under the pay provisions of the Jamex TLA. As a result, Ferrellgas, L.P. began negotiating a settlement with Jamex, and the Jamex TLA was terminated on September 1, 2016. While the agreement with the refinery owner was not terminated as a result of the execution and delivery of the Jamex Termination Agreement, Bridger was unable to negotiate a revised transportation and logistics agreement with that customer; accordingly it was unlikely that Bridger would continue to make any deliveries under the existing agreement. As of the date of this assessment, we did not anticipate any material contribution to revenue or gross margin from Jamex or Bridger's largest customer in the future. Additionally, the continued, sustained decline in crude oil prices and resulting decrease in crude oil production in the regions in which we operate significantly impacted our trucking operations during the three months ended July 31, 2016, a trend Ferrellgas, L.P. anticipated would continue into fiscal 2017 and beyond. This expected decline in future cash flows from operations constituted a triggering event in the fourth fiscal quarter of 2016 for its Midstream operations - crude oil logistics reporting unit, requiring impairment testing of indefinite-lived intangible assets, long-lived tangible and intangible assets within certain asset groups, and goodwill. Tradename impairment Upon applying the fair-value-based test to its Midstream operations - crude oil logistics reporting unit indefinite-lived intangible asset, which consists of its tradename, Ferrellgas, L.P. determined that the estimated fair value of the tradename as of July 31, 2016 was less than the carrying value, and as a result recorded an impairment charge of $7.4 million as of July 31, 2016. Ferrellgas, L.P. estimated the fair value of the tradename using the relief from royalty method, which is an income approach. Critical assumptions included in the relief from royalty method include: (1) discounted future cash flows; (2) growth factors; (3) a discount rate; and (4) a long-term growth rate. The majority of these critical assumptions were unobservable, accordingly Ferrellgas, L.P.'s estimate of fair value of the tradename was considered to be Level 3 in the fair value hierarchy. Long-lived asset impairment Ferrellgas, L.P. determined that multiple asset groups within the Midstream operations - crude oil logistics reporting unit were not recoverable. Ferrellgas, L.P. estimated the fair value of each of these asset groups and recorded impairment charges to the extent that fair value was less than the carrying value of the asset group. As of July 31, 2016, impairment charges of $249.0 million related to customer relationships and non-compete agreements and $181.8 million related to property, plant and equipment are included in “Asset impairments” in the Consolidated Statement of Operations. Fair value of the asset groups was determined using an income approach, which was comprised of multiple significant unobservable inputs including: (1) estimate of future cash flows; (2) the timing, success rate and capital required for certain organic growth projects; (3) the amount of capital expenditures required to maintain the existing cash flows; and (4) a terminal period growth rate equal to the expected rate of inflation. Accordingly, Ferrellgas, L.P.'s estimates of fair value of these asset groups were considered to be Level 3 in the fair value hierarchy. Goodwill impairment Ferrellgas, L.P. concluded that the fair value of the Midstream operations - crude oil logistics reporting unit no longer exceeded its carrying value as of July 31, 2016. Upon applying the second step of the impairment test, Ferrellgas, L.P. determined that the implied fair value of goodwill was zero, and accordingly we recorded an impairment charge of $190.6 million as of July 31, 2016, or all of the goodwill previously allocated to this reporting unit. Ferrellgas, L.P. used a discounted future cash flow model to estimate fair value of the reporting unit, which included multiple significant unobservable inputs, thus the estimate was considered to be Level 3 in the fair value hierarchy. Ferrellgas, L.P. prepared various cash flow models involving certain potential scenarios and probability weighted these scenarios which included the following critical assumptions: (1) discounted future cash flows; (2) the timing, success rate and capital required for certain organic growth projects; (3) the amount of capital expenditures required to maintain the existing cash flows; and (4) a terminal period growth rate equal to the expected rate of inflation. In addition to these critical cash flow assumptions, a discount rate of 11.5% was applied to the various projected cash flow models. Judgments and assumptions are inherent in management’s estimates used to determine the fair value of Ferrellgas, L.P.'s reporting units and the fair value of its indefinite-lived assets and long-lived assets, and are consistent with what management believes would be utilized by primary market participants.