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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Treasury Stock, at Cost
Non-controlling Interests
Balance, shares at Dec. 31, 2018   135.0          
Balance, value at Dec. 31, 2018 $ 5,267 $ 2 $ 2,667 $ 7,602 $ (59) $ (4,996) $ 51
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 174     164     10
Other comprehensive income (loss), net of taxes 4       4    
Dividends declared (72)     (72)      
Distributions to noncontrolling interest partners (10)           (10)
Issuance of common stock under benefit plans 6   2     4  
Stock-based compensation expense 17   16     1  
Exercise of stock options, value 20   1     $ 19  
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans (15)   (15)        
Purchases of treasury stock, shares   (1.0)       (0.6)  
Purchases of treasury stock, value (50)         $ (50)  
Balance, shares at Mar. 31, 2019   134.0          
Balance, value at Mar. 31, 2019 5,341 $ 2 2,671 7,694 (55) (5,022) 51
Balance, Value at Dec. 31, 2018 77            
Redeemable Non-controlling Interest [Abstract]              
Net income 2            
Distributions to noncontrolling interest partners (2)            
Balance, Value at Mar. 31, 2019 77            
Balance, shares at Dec. 31, 2019   133.0          
Balance, value at Dec. 31, 2019 5,687 $ 2 2,722 8,174 (39) (5,218) 46
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 105     99     6
Other comprehensive income (loss), net of taxes (19)       (19)    
Dividends declared (76)     (76)      
Distributions to noncontrolling interest partners (6)           (6)
Issuance of common stock under benefit plans 6   3     3  
Stock-based compensation expense 14   14        
Exercise of stock options, shares   2.0          
Exercise of stock options, value 80   12     $ 68  
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans (13)   (13)        
Purchases of treasury stock, shares   (1.0)       (0.7)  
Purchases of treasury stock, value (75)         $ (75)  
Balance, shares at Mar. 31, 2020   134.0          
Balance, value at Mar. 31, 2020 5,703 $ 2 $ 2,738 $ 8,197 $ (58) $ (5,222) $ 46
Balance, Value at Dec. 31, 2019 76            
Redeemable Non-controlling Interest [Abstract]              
Net income 1            
Distributions to noncontrolling interest partners (1)            
Balance, Value at Mar. 31, 2020 $ 76