Debt (Long-Term Debt Narrative) (Details) (Senior Notes [Member], Subsequent Event [Member], USD $)	Nov. 04, 2013 Fixed Rate, 6.75%, Due 2022 [Member]	Nov. 04, 2013 Fixed Rate, 6.75%, Due 2022 [Member] Ferrellgas, L.P. [Member]	Dec. 04, 2013 Fixed Rate, 9.125%, Due 2017 [Member]	Dec. 04, 2013 Fixed Rate, 9.125%, Due 2017 [Member] Ferrellgas, L.P. [Member]
Debt issuance principal amount	$ 325,000,000.0	$ 325,000,000.0
Debt interest rate	6.75%	6.75%	9.125%	9.125%
Debt redemption principal amount			$ 300,000,000.0	$ 300,000,000.0