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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Shares issued, beginning balance (in shares) at Dec. 31, 2017   122      
Stockholders’ equity, beginning balance at Dec. 31, 2017 $ 668 $ 1 $ 1,320 $ (579) $ (74)
Net loss (7)     (7)  
Employee stock compensation, employee stock purchase programs and option exercises (in shares)   1      
Employee stock compensation, employee stock purchase programs and option exercises 30   30    
Repurchases of common stock, retired (in shares)   (2)      
Repurchases of common stock, retired (77)     (77)  
Pension and postemployment benefit plans, net of tax 0        
Currency translation adjustment 4       4
Shares issued, beginning balance (in shares) at Mar. 31, 2018   121      
Stockholders’ equity, ending balance at Mar. 31, 2018 644 $ 1 1,350 (637) (70)
Shares issued, beginning balance (in shares) at Dec. 31, 2018   117      
Stockholders’ equity, beginning balance at Dec. 31, 2018 495 $ 1 1,418 (823) (101)
Net loss (10)     (10)  
Employee stock compensation, employee stock purchase programs and option exercises (in shares)   1      
Employee stock compensation, employee stock purchase programs and option exercises 48   48    
Repurchases of common stock, retired (in shares)   (1)      
Repurchases of common stock, retired (58)     (58)  
Pension and postemployment benefit plans, net of tax 1       1
Unrealized loss on derivatives, net of tax (3)       (3)
Currency translation adjustment (6)       (6)
Shares issued, beginning balance (in shares) at Mar. 31, 2019   117      
Stockholders’ equity, ending balance at Mar. 31, 2019 $ 467 $ 1 $ 1,466 $ (891) $ (109)