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Other, Net (Tables)
3 Months Ended
Mar. 31, 2021
Other, Net [Abstract]  
Schedule of Other Nonoperating Income (Expense)
Three Months Ended March 31, (in millions)
20212020
Interest income$0.9 $1.7 
AFUDC equity1.5 1.7 
Pension and other postretirement non-service benefit8.5 2.7 
Miscellaneous(0.4)(0.7)
Total Other, net$10.5 $5.4