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Financial Instruments - Forward Agreements to Purchase Foreign Currency (Details) - Forward agreements to purchase foreign currency - MXN ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Less than one year    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Notional amount $ 6,384 $ 9,042
Fair value Liability (104) (1,040)
Fair Value Asset 78 4
1-2 years    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Notional amount 23 66
Fair value Liability (2) (41)
2-3 years    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Notional amount $ 2 23
Fair value Liability   (2)
3-4 years    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Notional amount   $ 2