XML 193 R113.htm IDEA: XBRL DOCUMENT v3.20.1
Employee Benefits - Summary of Defined Benefit Obligation (DBO) and Plan Assets for Pension and Other Benefit Obligation Plans (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets $ (140,696,974) $ (108,118,868) $ (107,944,581) $ (98,020,192)
Reportable segments [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 140,483,909 107,906,727    
Reportable segments [member] | Mexico [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 115,691,830 84,592,642    
Reportable segments [member] | Puerto Rico [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 13,228,592 13,986,596    
Reportable segments [member] | Brazil [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 7,024,944 4,850,447    
Reportable segments [member] | Europe [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 4,538,543 4,477,042    
Defined benefit obligation [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets (342,569,774) (306,702,447) (329,113,625) (313,282,595)
Defined benefit obligation [member] | Reportable segments [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 342,356,709 306,490,306    
Defined benefit obligation [member] | Reportable segments [member] | Mexico [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 280,602,176 247,997,060    
Defined benefit obligation [member] | Reportable segments [member] | Puerto Rico [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 35,803,893 35,220,889    
Defined benefit obligation [member] | Reportable segments [member] | Brazil [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 21,412,097 18,795,315    
Defined benefit obligation [member] | Reportable segments [member] | Europe [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 4,538,543 4,477,042    
Plan assets [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 206,300,821 203,671,122 227,688,604 222,345,621
Plan assets [member] | Reportable segments [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets (206,300,821) (203,671,122)    
Plan assets [member] | Reportable segments [member] | Mexico [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets (164,910,346) (163,404,418)    
Plan assets [member] | Reportable segments [member] | Puerto Rico [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets (22,575,301) (21,234,293)    
Plan assets [member] | Reportable segments [member] | Brazil [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets (18,815,174) (19,032,411)    
Effect of asset celling [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets (4,428,021) (5,087,543) $ (6,519,560) $ (7,083,218)
Effect of asset celling [member] | Reportable segments [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets 4,428,021 5,087,543    
Effect of asset celling [member] | Reportable segments [member] | Brazil [member]        
Disclosure of defined benefit plans [line items]        
Defined benefit obligation and plan assets $ 4,428,021 $ 5,087,543