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Other Income
 12 Months Ended
Dec. 31, 2020
Other Income and Expenses [Abstract]  
Other Income Other Income
Other income consists of the following:

Years Ended December 31,
(in millions)202020192018
Investment income (loss)$— $0.2 $(0.2)
Gain on disposal of subsidiary1.6 — — 
Curtailment gain on postretirement benefits0.5 — — 
Other0.5 0.1 0.7 
Total$2.6 $0.3 $0.5