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Financial Instruments Additional Information (Details)
£ in Millions, $ in Millions
9 Months Ended 12 Months Ended
Sep. 27, 2015
USD ($)
Dec. 31, 2016
USD ($)
Jan. 03, 2016
USD ($)
Dec. 31, 2016
GBP (£)
Derivative [Line Items]        
Derivative, collateral, obligation to return cash   $ 67 $ 44  
Derivative, collateral, right to reclaim cash   67 44  
Loss on discontinuation of interest rate cash flow hedge   227    
Foreign currency cash flow hedge gain (loss) to be reclassified during next 12 months   14    
Interest rate contracts | Not designated as hedging instrument        
Derivative [Line Items]        
Derivative asset, notional amount unwound during the period   $ 7,900    
Foreign exchange contracts | Designated as hedging instrument        
Derivative [Line Items]        
Derivative, term   12 months    
Foreign exchange contracts | Not designated as hedging instrument        
Derivative [Line Items]        
Derivative, term   12 months    
Cross-currency contracts | Designated as hedging instrument        
Derivative [Line Items]        
Derivative, term   3 years    
Cross-currency contracts | Not designated as hedging instrument        
Derivative [Line Items]        
Derivative, term   2 years    
Commodity contracts | Not designated as hedging instrument        
Derivative [Line Items]        
Derivative, term   12 months    
Net Investment Hedging | Designated as hedging instrument        
Derivative [Line Items]        
Derivative asset, notional amount   $ 119    
Net deferred gains/(losses) on net investment hedges, before tax $ 234   $ 65  
United Kingdom, Pounds | Cross-currency contracts        
Derivative [Line Items]        
Derivative asset, notional amount   $ 1,400   £ 800
United Kingdom, Pounds | Net Investment Hedging | Debt | Designated as hedging instrument        
Derivative [Line Items]        
Derivative, amount of hedged item | £       £ 400