Multiemployer Pension Plans (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Multiemployer Pension Plan Description and Contributions

The following table presents information about multiemployer pension plans in which we participate:

		Pension		FIP/RP Status	Contributions of
	Employer	Protection Act		Pending/	the Company						Surcharge	Expiration Date
	Identification	Zone Status1		Implemented	Year Ended December 31,						Imposed	of Collective-
Pension Fund	Number	2023	2022	in 2023²	2023		2022		2021		in 2023	Bargaining Agreements
					(in millions of dollars)
USW3	23-6648508	Green	Green	No	$	4.2	$	3.8	$	3.6	No	Sep 2025 - Nov 2026
Other Funds4						1.4		1.4		1.4
					$	5.6	$	5.2	$	5.0

1.The zone status is based on information that we received from the plan and is certified by the plan’s actuary. Among other factors, plans in the green zone are at least 80% funded.

2.The “FIP/RP Status Pending/Implemented” column indicates if a Financial Improvement Plan (“FIP”) or a Rehabilitation Plan (“RP”) is either pending or has been implemented for the plan under the Pension Protection Act.

3.We are party to three collective bargaining agreements with the USW that require contributions to the Steelworkers Pension Trust. As of December 31, 2023, USW collective bargaining agreements covering employees at our Newark and Trentwood facilities covered 87% of our USW-represented employees and expire in September 2025. Our monthly contributions per hour worked by each

bargaining unit employee at our Newark and Trentwood facilities were (in whole dollars) $1.75 in 2023. The union contracts covering employees at our Richmond, Virginia facility and Florence, Alabama facility cover 10% and 3% of our USW-represented employees, respectively, and expire in November 2026 and March 2026, respectively. Our monthly contributions per hour worked by each bargaining unit employee at our Richmond, Virginia facility and Florence, Alabama facility were (in whole dollars) $1.50 and $1.35, respectively, in 2023.

4.Other Funds consists of plans that are not individually significant.