Supplemental Financial Statement Information Supplemental financial statement information (Significant Cash and Non-Cash Activities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Interest Paid	$ 85,171	$ 73,276
Proceeds from Income Tax Refunds	(458)
Income Taxes Paid		28
Noncash Investing and Financing Items [Abstract]
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	1,508	856
Change In Capital Expenditures Incurred But Not Yet Paid	386	(111)
Ferrellgas, L.P. [Member]
Interest Paid	69,775	67,314
Proceeds from Income Tax Refunds	(479)
Income Taxes Paid		23
Noncash Investing and Financing Items [Abstract]
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	1,508	856
Change In Capital Expenditures Incurred But Not Yet Paid	$ 386	$ (111)