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Consolidated Statements of Changes in Equity (Parentheticals) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Equity $ 9,385 $ 11,067
Cumulative translation adjustments    
Equity (82) (73)
Additional paid-in capital    
Equity 283 283
Convertible borrowings - equity component    
Equity $ 38 $ 38