Other Financial Data (Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2014	$ (2,287)
Other comprehensive income before reclassifications	4
Amounts reclassified from accumulated other comprehensive loss	13
Current period change in Other comprehensive income (loss)	17	(19)
Balance as of March 29, 2014	(2,270)
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2014	(1)
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	0
Current period change in Other comprehensive income (loss)	0
Balance as of March 29, 2014	(1)
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2014	(2)
Other comprehensive income before reclassifications	2
Amounts reclassified from accumulated other comprehensive loss	0
Current period change in Other comprehensive income (loss)	2
Balance as of March 29, 2014	0
Retirement Benefit Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2014	(2,188)
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	13
Current period change in Other comprehensive income (loss)	13
Balance as of March 29, 2014	(2,175)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2014	(96)
Other comprehensive income before reclassifications	2
Amounts reclassified from accumulated other comprehensive loss	0
Current period change in Other comprehensive income (loss)	2
Balance as of March 29, 2014	$ (94)