Inventory - Carrying Value (Details) - USD ($) $ in Millions |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Inventory [Line Items] | ||
| Feedstocks, raw materials and supplies | $ 349.9 | $ 378.0 |
| Refined products and blendstock | 502.6 | 515.2 |
| Total | 852.5 | 893.2 |
| Titled Inventory | ||
| Inventory [Line Items] | ||
| Feedstocks, raw materials and supplies | 220.6 | 246.5 |
| Refined products and blendstock | 230.3 | 243.4 |
| Total | 450.9 | 489.9 |
| Inventory Intermediation Agreement obligation | ||
| Inventory [Line Items] | ||
| Feedstocks, raw materials and supplies | 129.3 | 131.5 |
| Refined products and blendstock | 272.3 | 271.8 |
| Total | $ 401.6 | $ 403.3 |