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Other, Net
 12 Months Ended
Dec. 31, 2021
Other Nonoperating Income (Expense) [Abstract]  
Other, Net Other, Net
Year Ended December 31, (in millions)
202120202019
Interest income$4.0 $5.5 $7.7 
AFUDC equity13.1 9.9 8.0 
Charitable contributions(11.5)(1.5)(5.1)
Pension and other postretirement non-service cost(1)
35.5 9.3 (16.5)
Sale of emission reduction credits— 4.6 — 
Miscellaneous(0.3)4.3 0.7 
Total Other, net$40.8 $32.1 $(5.2)
(1) See Note 12, "Pension and Other Postretirement Benefits" for additional information.