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Non-operating Income (Expense) (Tables)
9 Months Ended
Sep. 30, 2022
Nonoperating Income (Expense) [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Quarter Ended September 30,Nine Months Ended September 30,
2022202120222021
Interest expense$(8.0)$(8.4)$(26.6)$(26.7)
Amortization of debt issuance costs(0.4)(0.5)(1.2)(1.4)
Interest income0.3 — 0.4 0.6 
Interest expense, net(8.0)(8.9)(27.3)(27.5)
Debt retirement costs— (0.5)(0.5)(0.5)
Non-operating pension and other postretirement employee benefits expense(1.4)(2.8)(4.3)(7.8)
Total non-operating expense$(9.4)$(12.2)$(32.1)$(35.7)