Leases - Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jan. 31, 2020	Jan. 31, 2020
Operating cash flows, operating leases	$ 10,598	$ 21,647
Operating cash flows, financing leases	318	360
Financing cash flows, financing leases	266	294
Ferrellgas, L.P. [Member]
Operating cash flows, operating leases	10,598	21,647
Operating cash flows, financing leases	318	360
Financing cash flows, financing leases	$ 266	$ 294