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Savings, Pension and Other Postretirement Employee Benefit Plans - Multiemployer Defined Benefit Plans (Details)	3 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2019	Dec. 31, 2024 USD ($) $ / Hour	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost			$ 5,800,000	$ 5,800,000	$ 5,700,000
Multiemployer Plan, Contribution Rate Increase (Decrease)			2.50%
Defined Benefit Plan, Number of Investment Options Holding Substantially All Pension Funds	8		8
IAM
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Pension, Significant, Surcharge [Fixed List]			No
Multiemployer Plan, Pension, Significant, Plan Number			002
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost			$ 200,000	$ 200,000	300,000
Multiemployer Plan, Pension, Significant, Collective-Bargaining Arrangement, Expiration Date			May 31, 2026
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List]			Red	Red
USW
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Pension, Significant, Surcharge [Fixed List]			No
Multiemployer Plan, Pension, Significant, Plan Number			001
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost			$ 5,700,000	$ 5,600,000	$ 5,500,000
Multiemployer Plan, Pension, Significant, Collective-Bargaining Arrangement, Expiration Date			Aug. 31, 2025
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List]			Red	Red
International Association Of Machinist Contribution Rate
Retirement Benefits [Abstract]
Contribution rates | $ / Hour			4.00
United Steel Workers Contribution Rate
Retirement Benefits [Abstract]
Contribution rates | $ / Hour			2.79
International Association Of Machinist Contribution Rate Additional Contribution
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Contribution Rate Increase (Decrease)	18.00%	2.50%

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Increase (decrease) in employer's contractual contribution rate to multiemployer plan.

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