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Other–Net, (Income) Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Nonoperating Income (Expense) [Abstract]    
Interest expense $ 102.8 $ 84.9
Interest income (34.2) (7.0)
Net investment losses on equity securities (Note 5) 13.7 425.4
Retirement benefit plans (115.8) (93.3)
Other (income) expense (2.2) (59.3)
Other–net, (income) expense $ (35.7) $ 350.7