Leases - Assets and Liabilities (Details) $ in Thousands	Jan. 31, 2020 USD ($)
Assets and Liabilities, Lessee [Abstract]
Operating Lease, Right-of-Use Asset	$ 120,423
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Operating Lease, Right-of-Use Asset
Finance Lease, Right-of-Use Asset	$ 15,003
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent
Total leased assets	$ 135,426
Operating Lease, Liability, Current	$ 33,263
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Current
Finance Lease, Liability, Current	$ 2,624
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current
Operating Lease, Liability, Noncurrent	$ 84,546
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Noncurrent
Finance Lease, Liability, Noncurrent	$ 13,049
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total leased liabilities	$ 133,482
Ferrellgas, L.P. [Member]
Assets and Liabilities, Lessee [Abstract]
Operating Lease, Right-of-Use Asset	$ 120,423
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Operating Lease, Right-of-Use Asset
Finance Lease, Right-of-Use Asset	$ 15,003
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent
Total leased assets	$ 135,426
Operating Lease, Liability, Current	$ 33,263
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Current
Finance Lease, Liability, Current	$ 2,624
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current
Operating Lease, Liability, Noncurrent	$ 84,546
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Operating Lease, Liability, Noncurrent
Finance Lease, Liability, Noncurrent	$ 13,049
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Total leased liabilities	$ 133,482