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Contract Liabilities (Tables)
 6 Months Ended
Jun. 26, 2021
Revenue from Contract with Customer [Abstract]  
Contract with Customer, Asset and Liability [Table Text Block]
The following table shows the changes in contract liability balances relating to long-term prepaid supply agreements during the first six months of 2021:
(In Millions)
Prepaid supply agreements balance as of December 26, 2020$1,625 
Concession payment(950)
Prepaids utilized(621)
Prepaid supply agreements balance as of June 26, 2021$54