v3.26.1
Stockholders' Equity (Schedule of Stockholders' Equity) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Redeemable Noncontrolling Interests        
Balance beginning of period $ 295.5 $ 299.8 $ 299.2 $ 300.1
Net income (loss) (2.4) (0.4) (5.0) (2.2)
Foreign currency translation adjustments (0.7) 4.9 (1.8) 6.4
Balance end of period 292.4 304.3 292.4 304.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance beginning of period 4,296.5 3,809.4 4,273.5 3,742.8
Stock compensation and employee stock purchase plans 17.3 9.2 21.8 5.6
Forward share repurchase contract 54.0   0.0  
Comprehensive income:        
Net income (loss) 77.2 314.8 132.2 325.3
Other comprehensive income:        
Foreign currency translation adjustments 2.2 53.3 41.8 134.0
Defined pension and postretirement benefit plans, net of tax 2.0 2.0 3.8 3.9
Deferred gains and losses on derivatives, net of tax 0.3 1.5 (2.6) 0.2
Payment of dividends to stockholders (21.0) (21.7) (42.0) (43.3)
Purchases and retirement of common stock (347.9)   (347.9)  
Balance end of period 4,080.6 4,168.5 4,080.6 4,168.5
Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance beginning of period 0.7 0.7 0.7 0.7
Other comprehensive income:        
Balance end of period 0.7 0.7 0.7 0.7
Additional Paid-in Capital        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance beginning of period 0.0 0.7 0.5 0.0
Stock compensation and employee stock purchase plans 17.3 9.3 21.8 10.0
Forward share repurchase contract 5.0   0.0  
Other comprehensive income:        
Purchases and retirement of common stock (11.4)   (11.4)  
Balance end of period 10.9 10.0 10.9 10.0
Retained Earnings        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance beginning of period 6,032.2 5,629.6 6,047.2 5,645.0
Stock compensation and employee stock purchase plans   (0.1)   (4.4)
Forward share repurchase contract 49.0   0.0  
Comprehensive income:        
Net income (loss) 77.2 314.8 132.2 325.3
Other comprehensive income:        
Payment of dividends to stockholders (21.0) (21.7) (42.0) (43.3)
Purchases and retirement of common stock (336.5)   (336.5)  
Balance end of period 5,800.9 5,922.6 5,800.9 5,922.6
Accumulated Other Comprehensive Loss        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance beginning of period (1,736.4) (1,821.6) (1,774.9) (1,902.9)
Other comprehensive income:        
Foreign currency translation adjustments 2.2 53.3 41.8 134.0
Defined pension and postretirement benefit plans, net of tax 2.0 2.0 3.8 3.9
Deferred gains and losses on derivatives, net of tax 0.3 1.5 (2.6) 0.2
Balance end of period $ (1,731.9) $ (1,764.8) $ (1,731.9) $ (1,764.8)