v3.3.1.900
Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Preferred shares, par value per share (USD per share) $ 0.01 $ 0.01
Preferred shares, authorized 50,000,000 50,000,000
Preferred shares, issued 0 0
Preferred shares, outstanding 0 0
Ordinary Shares, Par or Stated Value Per Share (USD per share) $ 0.01 $ 0.01
Ordinary shares, authorized 1,200,000,000 1,200,000,000
Common Stock, Shares, Issued 278,208,470 291,619,411
Ordinary shares, outstanding 278,208,470 291,619,411