Derivative Instruments and Hedging Activities - Other Derivatives (Details) - Not designated as hedging instruments - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Gain (Loss) on Derivative Instruments: | ||||
| Amount of gain (loss) recognized in income on derivatives | $ 31.6 | $ 117.0 | ||
| Commodity swaps | Derivative Instruments, Gain (Loss) by Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold | ||||
| Gain (Loss) on Derivative Instruments: | ||||
| Amount of gain (loss) recognized in income on derivatives | 37.5 | $ 28.3 | 125.1 | $ 61.1 |
| Commodity options | Derivative Instruments, Gain (Loss) by Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServicesSold | ||||
| Gain (Loss) on Derivative Instruments: | ||||
| Amount of gain (loss) recognized in income on derivatives | $ (5.9) | $ (8.1) | ||