v3.26.1
Derivative Financial Instruments - Details of Current and Potential Exposures and Aggregated by Credit Rating (Detail)
$ in Thousands
Dec. 31, 2025
USD ($)
Current | A+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos $ (93,536)
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
Current | A  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
Current | A-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos (967,507)
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
Current | BBB+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos (2,300,662)
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 48,962
Current | BBB  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos (46,867)
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 2,301
Current | BBB-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
Less than 1 year | A+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 68,647
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 46,385
Less than 1 year | A  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
Less than 1 year | A-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 351,810
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
Less than 1 year | BBB+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 338,917
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 92,883
Less than 1 year | BBB  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 80,756
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 1,043
Less than 1 year | BBB-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
1-3 years | A+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 87,542
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 87,542
1-3 years | A  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
1-3 years | A-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 676,714
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 676,714
1-3 years | BBB+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 2,780,959
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 2,780,959
1-3 years | BBB  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 684,915
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 684,915
1-3 years | BBB-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
3-5 years | A+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
3-5 years | A  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
3-5 years | A-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 728,216
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 728,216
3-5 years | BBB+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 491,732
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 491,732
3-5 years | BBB  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 204,943
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 204,943
3-5 years | BBB-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
5-7 years | A+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
5-7 years | A  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
5-7 years | A-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 782,010
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 782,010
5-7 years | BBB+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 380,076
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 380,076
5-7 years | BBB  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 227,186
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 227,186
5-7 years | BBB-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
7-10 years | A+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
7-10 years | A  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
7-10 years | A-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 694,686
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 694,686
7-10 years | BBB+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 438,843
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 438,843
7-10 years | BBB  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 335,039
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 335,039
7-10 years | BBB-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
More than 10 years | A+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
More than 10 years | A  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
More than 10 years | A-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
More than 10 years | BBB+  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
More than 10 years | BBB  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt 0
More than 10 years | BBB-  
Disclosure of detailed information about financial instruments [line items]  
Maximum Credit Exposure by term in Petroleos Mexicanos 0
Maximum Credit Exposure by term in Petroleos Mexicanos including debt $ 0