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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss)
The components of and changes in accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018 were as follows:
 Cumulative Translation AdjustmentPension and Postretirement BenefitsTotal
Balance at January 1, 2018$(11.6)$(6.3)$(17.9)
Currency translation(9.7)— (9.7)
Pension and OPEB activity, net of tax— (13.3)(13.3)
Balance at December 31, 2018(21.3)(19.6)(40.9)
Currency translation(1.1)— (1.1)
Pension and OPEB activity, net of tax— 5.0 5.0 
Balance at December 31, 2019(22.4)(14.6)(37.0)
Currency translation14.1 — 14.1 
Pension and OPEB activity, net of tax— 4.8 4.8 
Balance at December 31, 2020$(8.3)$(9.8)$(18.1)
No income taxes are provided on currency translation as foreign earnings are considered permanently re-invested.