Leases - Assets and Liabilities (Details) $ in Thousands	Apr. 30, 2020 USD ($)
Assets and Liabilities, Lessee [Abstract]
Operating Lease, Right-of-Use Asset	$ 110,497
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Operating Lease, Right-of-Use Asset
Finance Lease, Right-of-Use Asset	$ 24,495
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent
Total leased assets	$ 134,992
Operating Lease, Liability, Current	$ 31,914
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Current
Finance Lease, Liability, Current	$ 4,574
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current
Operating Lease, Liability, Noncurrent	$ 76,133
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Noncurrent
Finance Lease, Liability, Noncurrent	$ 20,250
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total leased liabilities	$ 132,871
Ferrellgas, L.P. [Member]
Assets and Liabilities, Lessee [Abstract]
Operating Lease, Right-of-Use Asset	$ 110,497
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Operating Lease, Right-of-Use Asset
Finance Lease, Right-of-Use Asset	$ 24,495
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent
Total leased assets	$ 134,992
Operating Lease, Liability, Current	$ 31,914
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Current
Finance Lease, Liability, Current	$ 4,574
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current
Operating Lease, Liability, Noncurrent	$ 76,133
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Noncurrent
Finance Lease, Liability, Noncurrent	$ 20,250
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total leased liabilities	$ 132,871