Multiemployer Pension Plans - Multiemployer Pension Plan Description and Contributions (Parenthetical) (Details)	6 Months Ended		12 Months Ended
	Dec. 31, 2024 Agreement $ / shares	Jun. 30, 2024 $ / shares	Dec. 31, 2024 Agreement $ / shares
Multiemployer Pension Plan Disclosure [Line Items]
Green zone funding percentage			80.00%
USW Plan
Multiemployer Pension Plan Disclosure [Line Items]
Number of collective-bargaining agreements | Agreement	3		3
USW Plan | Newark and Trentwood Facilities
Multiemployer Pension Plan Disclosure [Line Items]
Percentage of employees covered by bargaining agreement			87.00%
USW Plan | Newark and Trentwood Facilities | Starting in July Two Thousand Twenty
Multiemployer Pension Plan Disclosure [Line Items]
Monthly contributions per hour worked by each bargaining unit employee	$ 2.06	$ 1.75
USW Plan | Richmond (Bellwood), Virginia Facility
Multiemployer Pension Plan Disclosure [Line Items]
Percentage of employees covered by bargaining agreement			10.00%
Monthly contributions per hour worked by each bargaining unit employee			$ 1.50
USW Plan | Florence, Alabama Facility
Multiemployer Pension Plan Disclosure [Line Items]
Percentage of employees covered by bargaining agreement			3.00%
Monthly contributions per hour worked by each bargaining unit employee			$ 1.35