Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Narrative) (Details) - USD ($)
|
6 Months Ended |
12 Months Ended |
Jan. 31, 2016 |
Jul. 31, 2015 |
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Accounts receivable pledged as collateral |
$ 190,063,000
|
$ 123,791,000
|
| Ferrellgas, L.P. [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Accounts receivable pledged as collateral |
190,063,000
|
123,791,000
|
| Accounts Receivable Securitization [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Accounts receivable pledged as collateral |
190,100,000
|
123,800,000
|
| Collateralized notes payable |
119,000,000
|
70,000,000
|
| Proceeds from accounts receivable securitization |
119,000,000
|
70,000,000
|
| Available proceeds from additional trade accounts receivable |
$ 0
|
$ 0
|
| Weighted average interest rate on borrowings under accounts receivable securitization |
2.90%
|
2.30%
|
| Accounts Receivable Securitization [Member] | Ferrellgas, L.P. [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Accounts receivable pledged as collateral |
$ 190,100,000
|
$ 123,800,000
|
| Collateralized notes payable |
119,000,000
|
70,000,000
|
| Proceeds from accounts receivable securitization |
119,000,000
|
70,000,000
|
| Available proceeds from additional trade accounts receivable |
$ 0
|
$ 0
|
| Weighted average interest rate on borrowings under accounts receivable securitization |
2.90%
|
2.30%
|