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Non Operating Income and Expenses
 12 Months Ended
Dec. 31, 2022
Other Income and Expenses [Abstract]  
Other Nonoperating Income and Expense The major components of “Non-operating expense” in the Consolidated Statements of Operations for the years ended December 31 are reflected in the table below:
Years Ended December 31,
202220212020
Interest expense$(34.2)$(35.2)$(44.4)
Amortization of debt issuance costs(1.5)(1.8)(2.1)
Interest income1.0 0.6 — 
Interest expense, net(34.6)(36.4)(46.5)
Debt retirement costs(0.5)(1.0)(5.9)
Non-operating pension and other postretirement employee benefits expense(5.7)(10.4)(7.6)
Total non-operating expense$(40.9)$(47.7)$(59.9)