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Risk Management (Narrative) (Details) - USD ($)
$ in Millions
Jul. 04, 2015
Dec. 31, 2014
Derivative [Line Items]    
Notional amount of foreign currency derivatives $ 609 $ 628
Not Designated As Hedging Instruments    
Derivative [Line Items]    
Fair value of derivative liabilities 3 7
Not Designated As Hedging Instruments | Interest Rate Swap | Accrued liabilities    
Derivative [Line Items]    
Fair value of derivative liabilities 2 $ 2
Credit Concentration Risk    
Derivative [Line Items]    
Notional amount of foreign currency derivatives 3  
Reported Value Measurement    
Derivative [Line Items]    
Long-term debt $ 3,400