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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($)
shares in Millions, $ in Millions
Total controlling interest shareholders' equity
Shares
Additional paid-in capital
Treasury shares, at cost
Retained earnings
Accumulated other comprehensive loss
Noncontrolling interest
Total
Balance at Dec. 31, 2015 $ 14,690 $ 5,193 $ 5,736 $ (240) $ 4,278 $ (277) $ 310 $ 15,000
Balance (in shares) at Dec. 31, 2015   364            
Increase (Decrease) in Shareholders' Equity                
Share-based compensation 23   23         23
Reduction of par value   $ (5,159) 5,159          
Cancellation of shares held in treasury     (240) $ 240        
Issuance of shares under share-based compensation plans (in shares)   1            
Allocated capital for transactions with holders of noncontrolling interest (7)   (7)       7  
Net income (loss) attributable to controlling interest         317     317
Other comprehensive loss attributable to controlling interest           (9)   (9)
Total comprehensive income attributable to noncontrolling interest             7  
Total comprehensive income (loss) attributable to controlling interest 308             308
Total comprehensive income (loss)               315
Acquisition of noncontrolling interest             (5) (5)
Distributions to holders of noncontrolling interest             (16) (16)
Other, net 3   3         3
Balance at Jun. 30, 2016 15,017 $ 34 10,674   4,595 (286) 303 15,320
Balance (in shares) at Jun. 30, 2016   365            
Balance at Dec. 31, 2016 15,802 $ 36 10,993   5,056 (283) 3 15,805
Balance (in shares) at Dec. 31, 2016   389            
Increase (Decrease) in Shareholders' Equity                
Share-based compensation 21   21         21
Issuance of shares under share-based compensation plans   $ 1 (1)          
Issuance of shares under share-based compensation plans (in shares)   2            
Net income (loss) attributable to controlling interest         (1,599)     (1,599)
Other comprehensive loss attributable to controlling interest           (17)   (17)
Total comprehensive income attributable to noncontrolling interest             1  
Total comprehensive income (loss) attributable to controlling interest (1,616)             (1,616)
Total comprehensive income (loss)               (1,615)
Other, net (2)   (2)         (2)
Balance at Jun. 30, 2017 $ 14,205 $ 37 $ 11,011   $ 3,457 $ (300) $ 4 $ 14,209
Balance (in shares) at Jun. 30, 2017   391