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Other–Net, (Income) Expense
3 Months Ended
Mar. 31, 2025
Nonoperating Income (Expense) [Abstract]  
Other–Net, (Income) Expense Other–Net, (Income) Expense
Other–net, (income) expense consisted of the following:
Three Months Ended March 31,
 20252024
Interest expense$243.7 $179.6 
Interest income(48.3)(45.8)
Net investment (gains) losses on equity securities (Note 6)146.7 (16.0)
Retirement benefit plans(106.6)(116.1)
Other (income) expense 3.5 (28.8)
Other–net, (income) expense$239.0 $(27.1)