Derivative Instruments - Derivatives Gains and Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Revenue	Cost of Revenue	Cost of Revenue
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Revenue	Cost of Revenue	Cost of Revenue
Commodity derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ (2.4)	$ 9.0	$ (6.6)
Gain (loss) on derivatives not designated as hedging instruments	0.4	(5.0)	19.5
Commodity derivatives | Cost of Materials and Other
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	(71.0)	(30.7)	31.3
Derivatives not designated as hedging instruments: | Cost of Materials and Other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging instruments	(15.3)	(15.4)	7.8
Derivatives not designated as hedging instruments: | Commodity derivatives | Cost of Materials and Other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	(68.6)	(38.0)	37.7
Derivatives not designated as hedging instruments: | Commodity derivatives | Operating Expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	0.0	(1.7)	0.0
Designated as Hedging Instrument | Commodity derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Realized gains reclassified out of accumulated other comprehensive income and into cost of materials and other on commodity derivatives designated as cash flow hedging instruments	$ 0.0	$ 0.0	$ 0.2