Leases - Assets and Liabilities (Details) $ in Thousands	Jul. 31, 2020 USD ($)
Assets and Liabilities, Lessee [Abstract]
Operating Lease, Right-of-Use Asset	$ 107,349
Finance Lease, Right-of-Use Asset	$ 41,426
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent
Total leased assets	$ 148,775
Operating Lease, Liability, Current	29,345
Finance Lease, Liability, Current	$ 6,955
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current
Operating Lease, Liability, Noncurrent	$ 89,022
Finance Lease, Liability, Noncurrent	$ 33,473
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total leased liabilities	$ 158,795
Ferrellgas, L.P. [Member]
Assets and Liabilities, Lessee [Abstract]
Operating Lease, Right-of-Use Asset	107,349
Finance Lease, Right-of-Use Asset	$ 41,426
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent
Total leased assets	$ 148,775
Operating Lease, Liability, Current	29,345
Finance Lease, Liability, Current	$ 6,955
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current
Operating Lease, Liability, Noncurrent	$ 89,022
Finance Lease, Liability, Noncurrent	$ 33,473
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total leased liabilities	$ 158,795