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Consolidated Statements of Changes in Equity (Parentheticals) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Equity $ 18,467 $ 9,385 $ 11,106 $ 11,067
Cumulative translation adjustments        
Equity 85   72  
Additional paid-in capital        
Equity 283 283 283  
Convertible borrowings - equity component        
Equity $ 38 $ 38 $ 38