Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment by CGUs (Pemex Industrial Transformation) (Detail) - Industrial Transformation - 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	$ 3,408,052	$ 55,625
Salina Cruz Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	1,919,341	0
Cosoleacaque Petrochemical Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	1,436,266	0
Morelos Petrochemical Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	131,101	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	125,831	0
Madero Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	102,464	0
Minatitlán Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	67,838	0
Cactus Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	60,247	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	59,662	0
Pajaritos Petrochemical Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	13,339	0
Poza Rica Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	7,147	55,625
Matapionche Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	2,898	0
Arenque Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	(533)	0
Cangrejera Ethylene Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	(69,993)	0
Coatzacoalcos Gas Processor Complex
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	(83,852)	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	(114,194)	0
Tula Refinery
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Total	$ (249,510)	$ 0

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