Inventory Intermediation Obligations - Schedule of Outstanding Obligations Under Agreements (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other Liabilities Disclosure [Abstract]
Obligations related to Base Layer Volumes	$ 331.2	$ 408.7
Current portion	0.0	0.0
Total obligations under Inventory Intermediation Agreement	331.2	408.7
Other payable for monthly activity true-up	$ 9.9	$ 20.2