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Other Comprehensive Income (Loss) - Schedule of Tax Effects (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Benefit (expense) for income taxes allocated to other comprehensive income (loss) $ 115.8 $ (64.8)
Foreign Currency Translation Gains (Losses)    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Benefit (expense) for income taxes allocated to other comprehensive income (loss) 113.4 (52.0)
Net Unrealized Gains (Losses) on Available-For-Sale Securities    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Benefit (expense) for income taxes allocated to other comprehensive income (loss) (2.6) 1.4
Retirement Benefit Plans    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Benefit (expense) for income taxes allocated to other comprehensive income (loss) (1.5) 4.8
Net Unrealized Gains (Losses) on Cash Flow Hedges    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Benefit (expense) for income taxes allocated to other comprehensive income (loss) $ 6.5 $ (19.0)