Derivative Instruments and Hedging Activities - Open NYMEX Natural Gas Futures Positions (Details) - Gas Utility - Natural Gas Contracts - Long MMBTU in Thousands |
12 Months Ended |
---|---|
Sep. 30, 2019
MMBTU
$ / MMBTU
| |
Fiscal 2020 | |
Derivative [Line Items] | |
MMBtu (millions) | MMBTU | 66,360 |
Avg. Price Per MMBtu | $ / MMBTU | 2.66 |
Fiscal 2021 | |
Derivative [Line Items] | |
MMBtu (millions) | MMBTU | 2,680 |
Avg. Price Per MMBtu | $ / MMBTU | 2.68 |
Spire Missouri | Fiscal 2020 | |
Derivative [Line Items] | |
MMBtu (millions) | MMBTU | 66,360 |
Avg. Price Per MMBtu | $ / MMBTU | 2.66 |
Spire Missouri | Fiscal 2021 | |
Derivative [Line Items] | |
MMBtu (millions) | MMBTU | 2,680 |
Avg. Price Per MMBtu | $ / MMBTU | 2.68 |