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Accumulated Other Comprehensive Income (Loss) by Component (Tables)
 12 Months Ended
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The table below presents the changes in Accumulated other comprehensive income (loss) by component.
(in millions)Pension and postretirement benefitCumulative foreign currency translation adjustmentTotal
Balance as of December 31, 2018$(57.4)(398.8)$(456.2)
Other comprehensive loss before reclassification(18.0)43.0 25.0 
Amounts reclassified from AOCI after tax expense of $0.7, $- and $0.73.4 — 3.4 
Other comprehensive income after tax benefit of $4.5, $- and $4.5(14.6)43.0 28.4 
Balance as of December 31, 2019(72.0)(355.8)(427.8)
Other comprehensive income before reclassification(12.3)59.8 47.5 
Amounts reclassified from AOCI after tax expense of $0.7, $- and $0.73.1 — 3.1 
Other comprehensive income after tax benefit of $3.2, $- and $3.2(9.2)59.8 50.6 
Balance as of December 31, 2020$(81.2)(296.0)$(377.2)