Derivatives, Hedging Programs and Other Financial Instruments - Summary of Derivative Positions (Details) - 12 months ended Dec. 31, 2022 - Purchase Mmlb in Millions	EUR (€) Mmlb MMBTU	GBP (£) Mmlb MMBTU
Natural Gas
Derivative [Line Items]
Derivative non-monetary notional amount | MMBTU	3,480,000	3,480,000
Natural Gas | Minimum
Derivative [Line Items]
Derivative maturity period	Jan. 31, 2023
Natural Gas | Maximum
Derivative [Line Items]
Derivative maturity period	Dec. 31, 2025
British Pounds
Derivative [Line Items]
Derivative notional amount | £		£ 202,128
British Pounds | Minimum
Derivative [Line Items]
Derivative maturity period	May 31, 2023
British Pounds | Maximum
Derivative [Line Items]
Derivative maturity period	Sep. 30, 2023
Aluminum
Derivative [Line Items]
Derivative non-monetary notional amount	63.0	63.0
Aluminum | Minimum
Derivative [Line Items]
Derivative maturity period	Jan. 31, 2023
Aluminum | Maximum
Derivative [Line Items]
Derivative maturity period	Feb. 29, 2024
Midwest premium swap contracts
Derivative [Line Items]
Derivative non-monetary notional amount	63.0	63.0
Midwest premium swap contracts | Minimum
Derivative [Line Items]
Derivative maturity period	Jan. 31, 2023
Midwest premium swap contracts | Maximum
Derivative [Line Items]
Derivative maturity period	Feb. 29, 2024
Alloying Metals
Derivative [Line Items]
Derivative non-monetary notional amount	1.2	1.2
Alloying Metals | Minimum
Derivative [Line Items]
Derivative maturity period	Jan. 31, 2023
Alloying Metals | Maximum
Derivative [Line Items]
Derivative maturity period	Nov. 30, 2023
Euros
Derivative [Line Items]
Derivative notional amount | €	€ 908,441
Euros | Minimum
Derivative [Line Items]
Derivative maturity period	Mar. 31, 2023
Euros | Maximum
Derivative [Line Items]
Derivative maturity period	Feb. 29, 2024