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Consolidated Statement of Changes in Stockholder's Equity - USD ($)
$ in Millions
Common Stock
Treasury Stock
Additional Paid-In Capital
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Retained Earnings
Accumulated Other Comprehensive (Loss) Income
Redeemable Noncontrolling Interests
Cumulative Effect, Period of Adoption, Adjustment
Total
Beginning balance at Dec. 31, 2018 $ 1.2 $ (720.1) $ 2,660.2   $ 1,288.2 $ 11.5 $ 9.4   $ 3,241.0
Increase (Decrease) in Stockholders' Equity                  
Cash dividends on common stock         (150.0)       (150.0)
Stock-based compensation     21.8           21.8
Exercise of common stock options     9.3           9.3
Repurchases of common stock from employee stock plans   (11.0)             (11.0)
Purchase of common stock   (156.9)             (156.9)
Shares issued under employee stock purchase plan   0.9             0.9
Net income         374.9       374.9
Other comprehensive (loss) income           26.1     26.1
Net loss attributable to redeemable noncontrolling interest             (4.1)    
Redemption value adjustment of redeemable noncontrolling interest         (0.5)   0.5   (0.5)
Deconsolidation of former subsidiary with noncontrolling interest             $ (5.8)    
Ending balance at Dec. 31, 2019 1.2 (887.1) 2,691.3 $ (0.4) 1,512.6 37.6   $ (0.4) 3,355.6
Increase (Decrease) in Stockholders' Equity                  
Cash dividends on common stock         (170.6)       (170.6)
Stock-based compensation     21.7           21.7
Exercise of common stock options     0.2           0.2
Repurchases of common stock from employee stock plans   (14.2)             (14.2)
Purchase of common stock   (349.1)             (349.1)
Shares issued under employee stock purchase plan     0.1           0.1
Net income         468.2       468.2
Other comprehensive (loss) income           37.4     37.4
Ending balance at Dec. 31, 2020 1.2 (1,250.4) 2,713.3   1,809.8 75.0     3,348.9
Increase (Decrease) in Stockholders' Equity                  
Cash dividends on common stock         (193.3)       (193.3)
Stock-based compensation 0.1   26.6           26.7
Repurchases of common stock from employee stock plans   (6.2)             (6.2)
Purchase of common stock   (81.3)             (81.3)
Retirement of treasury stock (0.2) 1,231.1 (1,230.9)            
Shares issued under employee stock purchase plan     0.4           0.4
Net income         529.0       529.0
Other comprehensive (loss) income           (19.4)     (19.4)
Ending balance at Dec. 31, 2021 $ 1.1 $ (106.8) $ 1,509.4   $ 2,145.5 $ 55.6     $ 3,604.8