Other Financial Data (Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2013			$ (3,300)
Other comprehensive losses before reclassifications			(23)
Amounts reclassified from Accumulated other comprehensive loss			51
Current period change in Other comprehensive income (loss)	37	140	28	223
Balance as of September 28, 2013	(3,272)		(3,272)
Gains and Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2013			1
Other comprehensive losses before reclassifications			(1)
Amounts reclassified from Accumulated other comprehensive loss			(1)
Current period change in Other comprehensive income (loss)			(2)
Balance as of September 28, 2013	(1)		(1)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2013			2
Other comprehensive losses before reclassifications			0
Amounts reclassified from Accumulated other comprehensive loss			0
Current period change in Other comprehensive income (loss)			0
Balance as of September 28, 2013	2		2
Retirmenet Benefits Items [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2013			(3,211)
Other comprehensive losses before reclassifications			0
Amounts reclassified from Accumulated other comprehensive loss			52
Current period change in Other comprehensive income (loss)			52
Balance as of September 28, 2013	(3,159)		(3,159)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of January 1, 2013			(92)
Other comprehensive losses before reclassifications			(22)
Amounts reclassified from Accumulated other comprehensive loss			0
Current period change in Other comprehensive income (loss)			(22)
Balance as of September 28, 2013	$ (114)		$ (114)