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Consolidated Statement of Comprehensive Income (unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Statement of comprehensive income [abstract]        
Currency translation effects, tax (benefit) expense $ 1.0 $ (1.0) $ 0.5 $ (1.0)
Actuarial gains/(losses) from defined benefit plans, tax expense (benefit) 2.0 0.4 6.0 (2.0)
Fair value adjustments on equity securities, tax expense $ 0.9 $ 0.4 $ 1.0 $ 0.8