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Other Income, Net
 12 Months Ended
Dec. 31, 2023
Other Income and Expenses [Abstract]  
OTHER INCOME, NET OTHER INCOME, NET
Total other income, net was as follows for the years ended December 31:
(in millions)202320222021
Non-service components of net periodic benefit costs$97.7 $104.4 $72.2 
AFUDC-Equity59.1 29.4 18.0 
Gains (losses) from investments held in rabbi trust13.7 (12.6)18.6 
Earnings (losses) from equity method investments (1)
(1.1)9.3 19.9 
Other, net8.3 (1.7)4.5 
Other income, net$177.7 $128.8 $133.2 

(1)    Amounts do not include equity earnings of transmission affiliates as those earnings are shown as a separate line item on the income statements.