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Contingencies And Commitments - Contractual Operating Lease Commitments And Buyout Maturities (Details)
$ in Thousands
Jul. 31, 2019
USD ($)
Operating Lease Obligations [Member]  
Operating Leased Assets [Line Items]  
2020 $ 44,392
2021 36,134
2022 26,312
2023 20,432
2024 17,196
Thereafter 17,414
Operating Lease Obligations [Member] | Ferrellgas, L.P. [Member]  
Operating Leased Assets [Line Items]  
2020 44,392
2021 36,134
2022 26,312
2023 20,432
2024 17,196
Thereafter 17,414
Operating Lease Buyouts [Member]  
Operating Leased Assets [Line Items]  
2020 3,073
2021 4,371
2022 6,421
2023 3,527
2024 1,238
Thereafter 14,433
Operating Lease Buyouts [Member] | Ferrellgas, L.P. [Member]  
Operating Leased Assets [Line Items]  
2020 3,073
2021 4,371
2022 6,421
2023 3,527
2024 1,238
Thereafter $ 14,433