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Leases - Lease liabilities (Details)
$ in Millions, $ in Millions
Dec. 31, 2021
USD ($)
Dec. 31, 2021
MXN ($)
Dec. 31, 2020
MXN ($)
Leases      
Total undiscounted lease liabilities   $ 89,117 $ 88,594
Total lease liabilities   62,355 58,308
Current $ 356 7,306 6,772
Non-Current $ 2,683 55,049 51,536
Less than one year      
Leases      
Total undiscounted lease liabilities   11,428 11,511
One to five years      
Leases      
Total undiscounted lease liabilities   36,929 36,172
Five to ten years      
Leases      
Total undiscounted lease liabilities   27,580 27,088
More than ten years      
Leases      
Total undiscounted lease liabilities   $ 13,180 $ 13,823