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Non-operating Income (Expense) (Tables)
6 Months Ended
Jun. 30, 2024
Nonoperating Income (Expense) [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Quarter Ended June 30,Six Months Ended June 30,
2024202320242023
Interest expense$(16.1)$(7.6)$(22.8)$(15.2)
Amortization of debt issuance costs and accretion of debt discount(0.7)(0.3)(1.1)(0.6)
Interest income0.8 0.3 1.4 0.6 
Interest expense, net(16.0)(7.5)(22.6)(15.1)
Non-operating pension and other postretirement employee benefits0.3 0.1 0.7 0.2 
Total non-operating expense$(15.7)$(7.4)$(21.9)$(14.9)