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Other Current Assets and Other Current Financial Assets - Summary of Prepaid Expenses (Detail) - MXN ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Prepaid Expense Current [Abstract]    
Advances for inventories $ 1,260 $ 2,734
Advertising and promotional expenses paid in advance 370 171
Advances to service suppliers 268 466
Prepaid leases 218 164
Prepaid insurance 103 104
Others 206 145
Current prepaid expenses $ 2,425 $ 3,784