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Pension and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Retirement Benefits [Text Block] Pension and Other Post-retirement Benefits
    We have defined-benefit pension plans and retiree medical plans that provide post-retirement health and life insurance benefits.

    The components of net periodic pension and retiree medical cost were as follows (in millions):
SuccessorPredecessor
 Three Months Ended March 31, 2022Three Months Ended March 31, 2021
Interest cost5.5 5.0 
Expected return on plan assets(9.5)(9.1)
Amortization of net loss— 0.1 
Net periodic pension and retiree medical income (1)
$(4.0)$(4.0)

(1)Included in Other, net, in our Condensed Consolidated Statements of Operations.
In March 2021, the American Rescue Plan Act of 2021 ("ARPA-21") was passed. ARPA-21 provides funding relief for U.S. qualified pension plans which should lower pension contribution requirements over the next few years. As a result, we currently expect to contribute or directly pay approximately $4.2 million to our pension and other post-retirement benefits plans for the remainder of 2022. These amounts represent the minimum contributions we are required to make under relevant statutes. We do not expect to make contributions in excess of the minimum required amounts.