Risk Management (Summary Of Derivative Instruments And The Effect On The Condensed Consolidated Statements Of Operations) (Details) (Not Designated As Hedging Instruments, USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014
Gain (Loss) on Derivative Instruments
Total derivatives not designated as hedging instruments	$ (17)	$ (1)
Interest rate swap | Other Income (Expense)
Gain (Loss) on Derivative Instruments
Total derivatives not designated as hedging instruments	(1)	0
Foreign exchange derivative contracts | Other Income (Expense)
Gain (Loss) on Derivative Instruments
Total derivatives not designated as hedging instruments	$ (16)	$ (1)