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Consolidated Statements of Changes in Equity - USD ($)
shares in Thousands, $ in Millions
Total
Capital stock
Retained earnings (deficit)
Accumulated other comprehensive income (loss)
 [1]
Other
 [2]
Total equity attributable to shareholders
Non-controlling interests
Beginning balance (shares) at Dec. 31, 2015   1,165,081          
Beginning balance at Dec. 31, 2015 $ 9,455 $ 20,869 $ (13,642) $ (370) $ 321 $ 7,178 $ 2,277
Net income 861   655     655 206
Total other comprehensive income 188   7 181   188  
Total comprehensive income 1,049   662 181   843 206
Transactions with owners              
Dividends (86)   (86)     (86)  
Dividend reinvestment plan (shares)   493          
Dividend reinvestment plan   $ 8 (8)        
Funding from non-controlling interests 70           70
Other decrease in non-controlling interests (175)           (175)
Total transactions with owners (shares)   493          
Total transactions with owners (191) $ 8 (94)     (86) (105)
Ending balance (shares) at Dec. 31, 2016   1,165,574          
Ending balance at Dec. 31, 2016 10,313 $ 20,877 (13,074) (189) 321 7,935 2,378
Net income 1,516   1,438     1,438 78
Total other comprehensive income 38   18 20   38  
Total comprehensive income 1,554   1,456 20   1,476 78
Transactions with owners              
Dividends (125)   (125)     (125)  
Dividend reinvestment plan (shares)   1,003          
Dividend reinvestment plan   $ 16 (16)        
Decrease in non-controlling interest (note 4b) (493)           (493)
Funding from non-controlling interests 13           13
Other decrease in non-controlling interests (195)           (195)
Total transactions with owners (shares)   1,003          
Total transactions with owners (800) $ 16 (141)     (125) (675)
Ending balance (shares) at Dec. 31, 2017   1,166,577          
Ending balance at Dec. 31, 2017 $ 11,067 $ 20,893 $ (11,759) $ (169) $ 321 $ 9,286 $ 1,781
[1] Includes cumulative translation adjustments as at December 31, 2017: $73 million loss (2016: $82 million).
[2] Includes additional paid-in capital as at December 31, 2017: $283 million (December 31, 2016: $283 million) and convertible borrowings - equity component as at December 31, 2017: $38 million (December 31, 2016: $38 million).