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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Millions
Total
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
(Accumulated Deficit) Retained Earnings [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Non-controlling Interests [Member]
Total stockholders' equity, beginning balance at Dec. 31, 2016 $ 104 $ 2   $ 789 $ (114) $ (577) $ 4
Shares, beginning balance at Dec. 31, 2016   182,600,533          
Common stock issued - compensation plans (in shares)   569,263          
Exercise of stock options, net 31     31      
Exercise of stock options, net (in shares)   2,173,238          
Purchases of treasury stock, at cost (116)   $ (116)        
Purchases of treasury stock at cost (in shares)     2,386,406        
Stock-based compensation expense 29     29      
Cancellation of unissued stock awards withheld to cover taxes (12)     (12)      
Net income (loss) 747       746   1
Dividends (53)       (53)    
Other comprehensive income (loss) 135         135  
Total stockholders' equity, ending balance at Dec. 31, 2017 865 $ 2 $ (116) 837 579 (442) 5
Shares, ending balance at Dec. 31, 2017   185,343,034 2,386,406        
Common stock issued - compensation plans (in shares)   783,346          
Exercise of stock options, net 16     16      
Exercise of stock options, net (in shares)   1,078,187          
Purchases of treasury stock, at cost (634)   $ (634)        
Purchases of treasury stock at cost (in shares)     14,050,098        
Shares issued under employee stock purchase plan (in shares)     (12,411)        
Stock-based compensation expense 24     24      
Cancellation of unissued stock awards withheld to cover taxes (17)     (17)      
Cumulative effect of adopting ASU No. 2018-02         9 (9)  
Net income (loss) 996       995   1
Dividends (117)       (117)    
Other comprehensive income (loss) (113)         (113)  
Total stockholders' equity, ending balance at Dec. 31, 2018 1,020 $ 2 $ (750) 860 1,466 (564) 6
Shares, ending balance at Dec. 31, 2018   187,204,567 16,424,093        
Common stock issued - compensation plans       1 (1)    
Common stock issued - compensation plans (in shares)   1,098,542          
Exercise of stock options, net 9     9      
Exercise of stock options, net (in shares)   590,369          
Purchases of treasury stock, at cost (322)   $ (322)        
Purchases of treasury stock at cost (in shares)     8,895,142        
Stock-based compensation expense 19     19      
Cancellation of unissued stock awards withheld to cover taxes (30)     (30)      
Net income (loss) (52)       (52)    
Dividends (164)       (164)    
Other comprehensive income (loss) 215         215  
Total stockholders' equity, ending balance at Dec. 31, 2019 $ 695 $ 2 $ (1,072) $ 859 $ 1,249 $ (349) $ 6
Shares, ending balance at Dec. 31, 2019   188,893,478 25,319,235