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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Millions
Total
Common Stock
Class A
Common Stock
Class B
Additional Paid-In Capital
Accumulated Other Comprehensive Loss
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Retained Earnings
Beginning balance at Dec. 31, 2019 $ 1,467.7 $ 20.5 $ 0.1 $ 46.0 $ (0.7) $ 1,401.8 $ (4.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Compensation for stock and stock option issuances and excess tax benefits from option exercises   8.9   (3.8)      
Issuance of stock in connection with employee stock plans   2.6          
Repurchase of class A common stock   (32.0)   (16.2)      
Gain (loss) on cash flow hedges, net of tax (expense) benefit of ($0.6) and $1.8 (5.1)       (5.1)    
Net income 46.2         46.2  
Dividends paid           (7.0)  
Ending balance at Mar. 31, 2020 1,456.5 0.0 0.1 26.0 (5.8) 1,436.2  
Beginning balance at Dec. 31, 2020 2,661.5 788.2 0.0 41.4 (6.3) 1,838.2  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Compensation for stock and stock option issuances and excess tax benefits from option exercises   13.4   (5.4)      
Issuance of stock in connection with employee stock plans   4.2          
Repurchase of class A common stock   (15.9)   0.0      
Gain (loss) on cash flow hedges, net of tax (expense) benefit of ($0.6) and $1.8 1.8       1.8    
Net income 156.2         156.2  
Dividends paid           (8.2)  
Ending balance at Mar. 31, 2021 $ 2,807.6 $ 789.9 $ 0.0 $ 36.0 $ (4.5) $ 1,986.2