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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2019
Dec. 31, 2018
Equity    
Share capital, shares issued (in shares) 196,894,321 169,821,192
Share capital, shares outstanding (in shares) 196,894,321 169,821,192
Ordinary shares issued (dollars per share) $ 1 $ 1