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Business Combinations Business Combinations (Aggregate Fair Value - Crude Oil Logistics) (Details) - Midstream - Crude Oil Logistics [Member] - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2016
Jun. 24, 2016
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities $ (600) $ 8,315
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets   2,375
Postconfirmation, Goodwill 1,400 189,196
Finite-lived Intangible Assets Acquired 700  
Aggregate fair value of transactions 10,700 822,452
Computer And Office Equipment [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment   7,449
Injection Stations and Pipelines [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment   41,632
Transportation Equipment [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment   293,491
Customer Lists [Member]    
Business Acquisition [Line Items]    
Finite-lived Intangible Assets Acquired   277,224
Non-Compete Agreements [Member]    
Business Acquisition [Line Items]    
Finite-lived Intangible Assets Acquired   10,000
Ferrellgas, L.P. [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities (600) 8,315
Postconfirmation, Goodwill 1,400 189,196
Finite-lived Intangible Assets Acquired 700  
Aggregate fair value of transactions $ 10,700 822,452
Ferrellgas, L.P. [Member] | Transportation Equipment [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment   293,491
Ferrellgas, L.P. [Member] | Injection Stations and Pipelines [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment   41,632
Ferrellgas, L.P. [Member] | Computer And Office Equipment [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment   7,449
Ferrellgas, L.P. [Member] | Other Assets, Net [Member]    
Business Acquisition [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets   2,375
Ferrellgas, L.P. [Member] | Customer Relationships [Member]    
Business Acquisition [Line Items]    
Finite-lived Intangible Assets Acquired   277,224
Ferrellgas, L.P. [Member] | Non-Compete Agreements [Member]    
Business Acquisition [Line Items]    
Finite-lived Intangible Assets Acquired   10,000
Ferrellgas, L.P. [Member] | Trademarks and Trade Names [Member]    
Business Acquisition [Line Items]    
Trade names & trademarks   9,400
Trademarks and Trade Names [Member]    
Business Acquisition [Line Items]    
Trade names & trademarks   $ 9,400