Inventory - Carrying Value (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Inventory [Line Items] | ||
| Feedstocks, raw materials and supplies | $ 378.3 | $ 378.0 |
| Refined products and blendstock | 482.6 | 515.2 |
| Total | 860.9 | 893.2 |
| Titled Inventory | ||
| Inventory [Line Items] | ||
| Feedstocks, raw materials and supplies | 245.6 | 246.5 |
| Refined products and blendstock | 245.0 | 243.4 |
| Total | 490.6 | 489.9 |
| Inventory Intermediation Agreement obligation | ||
| Inventory [Line Items] | ||
| Feedstocks, raw materials and supplies | 132.7 | 131.5 |
| Refined products and blendstock | 237.6 | 271.8 |
| Total | $ 370.3 | $ 403.3 |