v3.7.0.1
CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
CONDENSED CONSOLIDATED BALANCE SHEETS    
Trade accounts receivable, allowances (in dollars) $ 120 $ 122
Convertible perpetual preference shares, par value (in dollars per share) $ 0.01 $ 0.01
Convertible perpetual preference shares, authorized 6,899,700 6,900,000
Convertible perpetual preference shares, issued 6,899,700 6,900,000
Convertible perpetual preference shares, outstanding 6,899,700 6,900,000
Convertible perpetual preference shares, liquidation preference (in dollars per share) $ 100 $ 100
Common shares, par value (in dollars per share) $ 0.01 $ 0.01
Common shares, authorized 400,000,000 400,000,000
Common shares, issued 140,591,756 139,500,862
Common shares, outstanding 140,591,756 139,500,862
Treasury shares, at cost 12,882,313 12,882,313