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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Treasury Stock
Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 31, 2013   191 (32)      
Beginning Balance at Dec. 31, 2013 $ 1,857 $ 2 $ (1,184) $ 973 $ 2,033 $ 33
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 367       367  
Employee stock compensation, employee stock purchase programs and option exercises (in shares)   2        
Employee stock compensation, employee stock purchase programs and option exercises   $ (1)        
Employee stock compensation, employee stock purchase programs and option exercises 77     78    
Income tax benefit from stock compensation plans 3     3    
Retirement of common stock previously held as treasury (in shares)   (32) 32      
Retirement of common stock previously held as treasury     $ 1,184   (1,184)  
Repurchases of Company common stock, retired (in shares)   (13)        
Repurchases of common stock, retired (560)       (560)  
Pension and postemployment benefit plans, net of tax (21)         (21)
Unrealized gain on securities 31         31
Currency translation adjustment (47)         (47)
Ending Balance (in shares) at Dec. 31, 2014   148 0      
Ending Balance at Dec. 31, 2014 1,707 $ 1 $ 0 1,054 656 (4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) (214)       (214)  
Employee stock compensation, employee stock purchase programs and option exercises (in shares)   2        
Employee stock compensation, employee stock purchase programs and option exercises 78     78    
Income tax benefit from stock compensation plans (4)     (4)    
Repurchases of Company common stock, retired (in shares)   (19)        
Repurchases of common stock, retired (646)       (646)  
Pension and postemployment benefit plans, net of tax (5)         (5)
Unrealized gain on securities (31)         (31)
Currency translation adjustment (36)         (36)
Ending Balance (in shares) at Dec. 31, 2015   131 0      
Ending Balance at Dec. 31, 2015 849 $ 1 $ 0 1,128 (204) (76)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 125       125  
Employee stock compensation, employee stock purchase programs and option exercises (in shares)   3        
Employee stock compensation, employee stock purchase programs and option exercises 92     92    
Purchases of treasury stock, retired (in shares)   (3)        
Repurchases of common stock, retired (82)       (82)  
Pension and postemployment benefit plans, net of tax (6)         (6)
Unrealized gain on securities 0          
Currency translation adjustment (7)         (7)
Ending Balance (in shares) at Dec. 31, 2016   131 0      
Ending Balance at Dec. 31, 2016 $ 971 $ 1 $ 0 $ 1,220 $ (161) $ (89)