XML 127 R113.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share-based payments - MIP I, movement in share options (Details) - MIP I
 12 Months Ended
Dec. 31, 2017
MXN ($)
EquityInstruments
Dec. 31, 2016
MXN ($)
EquityInstruments
Share-based payments    
Outstanding at beginning of the year (shares) | EquityInstruments 12,557,857 15,857,856
Exercised during the year (shares) | EquityInstruments (120,000) (3,299,999)
Outstanding at end of the year (shares) | EquityInstruments 12,437,857 12,557,857
Outstanding at beginning of the year (Exercise price) $ 5.31 $ 5.31
Exercised during the year (Exercise price) 5.31 5.31
Outstanding at end of the year (Exercise price) 5.31 5.31
Outstanding at beginning of the year (Total) 66,733,000 84,269,000
Exercised during the year (Total) (638,000) (17,536,000)
Outstanding at end of the year (Total) $ 66,095,000 $ 66,733,000