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Derivative Instruments and Fair Value Measurements - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 27, 2020
Dec. 28, 2019
Derivative [Line Items]    
Net deferred losses reported in AOCI to be reclassified into income in the next twelve months $ (16)  
Concentration of risk, derivative instruments assets 86  
Collateral posted 0  
Derivative, Collateral, Obligation to Return Cash 32 $ 7
Other current liabilities    
Derivative [Line Items]    
Derivative, Collateral, Obligation to Return Cash 58  
Accounts Receivable, Net | Exchange-traded commodity    
Derivative [Line Items]    
Margin deposits $ 28  
Five Largest Accounts | Customer Concentration Risk | Accounts Receivable, Net    
Derivative [Line Items]    
Concentration percentage 24.00%