Derivative Instruments Notional Activity (Details) MMBTU in Millions |
9 Months Ended |
|---|---|
|
Sep. 30, 2026
MMBTU
| |
| Forward natural gas contracts | |
| Notional Activity [Line Items] | |
| Notional (MMBtu millions) | 193.7 |
| Maximum Term (Months) | 61 months |
| NYMEX/ICE Natural Gas Contracts | Natural gas futures | |
| Notional Activity [Line Items] | |
| Notional (MMBtu millions) | 47.4 |
| Maximum Term (Months) | 39 months |
| NYMEX/ICE Natural Gas Contracts | Natural gas options | |
| Notional Activity [Line Items] | |
| Notional (MMBtu millions) | 22.7 |
| Maximum Term (Months) | 18 months |
| NYMEX/ICE Natural Gas Contracts | Natural gas basis swaps | |
| Notional Activity [Line Items] | |
| Notional (MMBtu millions) | 18.2 |
| Maximum Term (Months) | 13 months |