Derivative and Other Financial Instruments (Narrative) (Details)
3 Months Ended 9 Months Ended
Oct. 02, 2016
USD ($)
Swap
Sep. 27, 2015
USD ($)
Oct. 02, 2016
USD ($)
Swap
Sep. 27, 2015
USD ($)
Dec. 31, 2015
USD ($)
Swap
Derivative and Other Financial Instruments          
Short-term investments $ 462,000,000   $ 462,000,000   $ 872,000,000
Average maturity of short-term investments     3 months    
Sales of short-term investments 0 $ 0 $ 0 $ 209,000,000  
Maximum [Member]          
Derivative and Other Financial Instruments          
Foreign currency forward contracts, off-set or netting provisions, fair value of counterparty default exposure 1,000,000   1,000,000   $ 1,000,000
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax $ (1,000,000) $ (1,000,000) $ 1,000,000 1,000,000  
Realized gain on sales of short-term investments       $ 1,000,000  
Interest Rate Swap [Member]          
Derivative and Other Financial Instruments          
Interest rate swaps outstanding | Swap 0   0   0
Foreign Exchange Forward [Member]          
Derivative and Other Financial Instruments          
Derivative Asset $ 49,000,000   $ 49,000,000   $ 9,000,000
Derivative Liability 49,000,000   49,000,000   29,000,000
Notional Amount on foreign currency contracts 1,619,000,000   1,619,000,000   1,076,000,000
Foreign Currency Forward Contracts Net Notional Exposure 239,000,000   239,000,000   117,000,000
Fair Value, Inputs, Level 2 [Member]          
Derivative and Other Financial Instruments          
Short-term investments $ 462,000,000   $ 462,000,000   $ 872,000,000