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Consolidated Statements of Changes in Equity (Parentheticals) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Equity $ 11,067 $ 10,313
Cumulative translation adjustments    
Equity 73 82
Additional paid-in capital    
Equity 283 283
Convertible borrowings - equity component    
Equity $ 38 $ 38