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Consolidated Statement of Changes In Equity (Parentheticals) - $ / shares
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]      
Authorized share capital (in shares) 2,500,000,000 2,500,000,000 2,500,000,000
Nominal value (in dollars per share) $ 1 $ 1 $ 1
Shares issued (in shares) 1,180,536,830 1,180,536,830 1,180,536,830