Financial Instruments - Forward Agreements to Purchase Foreign Currency (Details) - MXN ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of Financial Assets and Financial Liabilities [Line Items] | ||
| Notional Amount | $ 76,500 | $ 67,218 |
| 2027 | ||
| Disclosure of Financial Assets and Financial Liabilities [Line Items] | ||
| Notional Amount | 1,797 | |
| 2026 | ||
| Disclosure of Financial Assets and Financial Liabilities [Line Items] | ||
| Notional Amount | 5,541 | |
| Foreign exchange forward contracts | 2027 | ||
| Disclosure of Financial Assets and Financial Liabilities [Line Items] | ||
| Notional Amount | 10,533 | |
| Fair value Liability | (653) | |
| Fair Value Asset | $ 34 | |
| Foreign exchange forward contracts | 2026 | ||
| Disclosure of Financial Assets and Financial Liabilities [Line Items] | ||
| Notional Amount | 8,052 | |
| Fair value Liability | (138) | |
| Fair Value Asset | $ 560 |