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Other Current Assets and Other Current Financial Assets - Summary of Prepaid Expenses (Detail) - MXN ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Prepaid Expense Current [abstract]    
Advances for inventories $ 1,500 $ 1,260
Advertising and promotional expenses paid in advance 510 370
Advances to service suppliers 236 268
Prepaid leases 211 218
Prepaid insurance 117 103
Others 140 206
Current prepaid expenses $ 2,714 $ 2,425