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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total Stockholders' Equity $ 6,679.4 $ 9,051.3 $ 6,569.3 $ 8,741.2
Total other comprehensive income (loss) net of tax 255.7 (25.4) 384.1 (115.3)
Total Stockholders' Equity 7,128.7 6,778.9 7,128.7 6,778.9
Other (income) expense, net (16.2) (18.2) (53.4) (52.6)
Accumulated Translation Adjustment        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total Stockholders' Equity     (540.4) (334.1)
Other Comprehensive Income (Loss), before Reclassifications, before Tax     379.4 (116.6)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax     0.0 0.0
Other Comprehensive Income (Loss), Tax     (1.3) 0.2
Total other comprehensive income (loss) net of tax     378.1 (116.4)
Total Stockholders' Equity (162.3) (450.5) (162.3) (450.5)
Accumulated Defined Benefit Plans Adjustment        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total Stockholders' Equity     (1.8) (2.8)
Other Comprehensive Income (Loss), before Reclassifications, before Tax     0.0 0.3
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax     0.3 0.2
Other Comprehensive Income (Loss), Tax     (0.2) 0.8
Total other comprehensive income (loss) net of tax     (0.5) 0.9
Total Stockholders' Equity (2.3) (1.9) (2.3) (1.9)
Accumulated Defined Benefit Plans Adjustment | Reclassification Out Of Accumulated Other Comprehensive Income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other (income) expense, net 0.1 0.4 0.3 0.3
Accumulated Net Unrealized Investment Gain (Loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total Stockholders' Equity     4.0 0.9
Other Comprehensive Income (Loss), before Reclassifications, before Tax     9.9 (0.1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax     1.4 (0.3)
Other Comprehensive Income (Loss), Tax     (2.0) 0.0
Total other comprehensive income (loss) net of tax     6.5 0.2
Total Stockholders' Equity 10.5 1.1 10.5 1.1
Accumulated Net Unrealized Investment Gain (Loss) | Reclassification Out Of Accumulated Other Comprehensive Income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other (income) expense, net (0.9) 0.5 (1.4) 0.3
AOCI Attributable to Parent        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total Stockholders' Equity (409.8) (425.9) (538.2) (336.0)
Other Comprehensive Income (Loss), before Reclassifications, before Tax     389.3 (116.4)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax     1.7 (0.1)
Other Comprehensive Income (Loss), Tax     (3.5) 1.0
Total other comprehensive income (loss) net of tax     384.1 (115.3)
Total Stockholders' Equity $ (154.1) $ (451.3) $ (154.1) $ (451.3)