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Derivative Instruments (Interest rate swaps) (Details) - Interest rate swaps - Designated as Hedging Instrument - USD ($)
$ in Millions
Dec. 28, 2018
Dec. 29, 2017
Derivatives, Fair Value [Line Items]    
Liability derivatives $ 35 $ 0
Fair value interest rate swaps | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Liability derivatives 3 0
Cash flow interest rate swaps | Other assets    
Derivatives, Fair Value [Line Items]    
Asset derivatives 0 37
Cash flow interest rate swaps | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Liability derivatives $ 32 $ 0