Wells, Pipelines, Properties, Plant And Equipment, Net - Impairment of Fixed Assets (Detail) - MXN ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	$ 149,726,546	$ 67,094,802
Salamanca Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	34,445,344	47,317,308
Cadereyta Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	34,542,856	0
Salina Cruz Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	21,499,189	0
Tula Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	18,031,185	0
Cangrejera Ethylene Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	11,478,401	0
Nuevo Pemex Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	8,103,196	0
Ciudad Pemex Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	6,467,546	0
Cactus Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	5,279,754	0
Burgos
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	1,671,119	1,121,968
Independencia Petrochemical Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	5,555,473	0
La Venta Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	983,445	0
Coatzacoalcos Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	905,971	1,635,554
Morelos Ethylene Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	578,097	0
Pajaritos Ethylene Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	184,970	0
Madero Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	0	3,336,427
Minatitlán Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	0	12,874,545
Cosoleacaque Petrochemical Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	0	809,000
Poza Rica Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	$ 0	$ 0

Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]