XML 69 R77.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Financial Instruments - Summarizes outstanding Cross Currency Swap Agreements (Detail) - MXN ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]    
Fair Value Asset   $ 2,605,000,000
Cross Currency Swaps [member] | Not later than one year [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Maturity Date 2019 2019
Notional Amount $ 4,641,000,000 $ 4,652,000,000
Fair Value Asset $ 815,000,000 $ 498,000,000
Cross Currency Swaps [member] | Later than one year and not later than two years [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Maturity Date 2020 2020
Notional Amount $ 14,366,000,000 $ 14,400,000,000
Fair Value (Liability) (174,000,000) (79,000,000)
Fair Value Asset $ 1,125,000,000 $ 969,000,000
Cross Currency Swaps [member] | Later than two years and not later than three years [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Maturity Date   2021
Notional Amount   $ 4,035,000,000
Fair Value Asset   $ 586,000,000
Cross Currency Swaps [member] | Later than three years and not later than four years [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Maturity Date   2023
Notional Amount   $ 11,219,000,000
Fair Value (Liability)   (390,000,000)
Fair Value Asset   $ 135,000,000
Cross Currency Swaps [member] | Later than four years and not later than five years [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Maturity Date   2027
Notional Amount   $ 6,889,000,000
Fair Value (Liability)   (42,000,000)
Fair Value Asset   $ 202,000,000
Cross Currency Swaps [member] | Later than five years [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Maturity Date 2027  
Notional Amount $ 6,873,000,000  
Fair Value (Liability) (545,000,000)  
Fair Value Asset $ 54,000,000  
Cross Currency Swaps [member] | Later than two years and not later than five years [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Maturity Date 2023  
Notional Amount $ 11,193,000,000  
Fair Value (Liability) (247,000,000)  
Fair Value Asset $ 25,000,000