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Condensed Consolidated Statements of Equity (Unaudited) - USD ($)
$ in Millions
Total
Common Stock
Paid-In Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Treasury Stock
Non- controlling Interests
Beginning Balance at Dec. 31, 2015 $ 2,453.8 $ 1.7 $ 2,602.2 $ (52.5) $ 501.6 $ (602.1) $ 2.9
Comprehensive income:              
Net income 309.5       309.6   (0.1)
Other comprehensive income 0.3     0.3      
Stock options exercised 24.8   24.8        
Stock-based compensation 14.5   24.3     (9.8)  
Treasury stock purchase (362.7)         (362.7)  
Dividends (72.8)       (72.8)    
Dividends paid to noncontrolling interests (1.4)           (1.4)
Other (5.8)   (5.8)        
Ending Balance at Sep. 30, 2016 2,360.2 1.7 2,645.5 (52.2) 738.4 (974.6) 1.4
Beginning Balance at Dec. 31, 2016 2,363.0 1.7 2,653.8 (71.9) 814.6 (1,036.7) 1.5
Comprehensive income:              
Net income 344.7       344.6   0.1
Other comprehensive income 46.4     46.4      
Stock options exercised 25.7   25.7        
Stock-based compensation 22.5   32.7     (10.2)  
Treasury stock purchase (173.7)         (173.7)  
Dividends (82.7)       (82.7)    
Ending Balance at Sep. 30, 2017 $ 2,545.9 $ 1.7 $ 2,712.2 $ (25.5) $ 1,076.5 $ (1,220.6) $ 1.6