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Other–Net, (Income) Expense
9 Months Ended
Sep. 30, 2022
Nonoperating Income (Expense) [Abstract]  
Other–Net, (Income) Expense Other–Net, (Income) Expense
Other–net, (income) expense consisted of the following:
Three Months Ended September 30,Nine Months Ended September 30,
 2022202120222021
Interest expense$81.5 $83.6 $247.6 $258.4 
Interest income(20.1)(7.0)(37.3)(18.0)
Net investment (gains) losses on equity securities (Note 6)123.3 246.8 667.6 (270.1)
Retirement benefit plans(92.4)(72.6)(280.0)(217.1)
Debt extinguishment loss (Note 6) 405.2  405.2 
Other (income) expense 18.7 (20.1)(17.0)(34.1)
Other–net, (income) expense$111.0 $635.9 $580.9 $124.3