Other Financial Data (Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012	$ (3,300)
Other comprehensive loss before reclassifications	(37)
Amounts reclassified from accumulated other comprehensive income (loss)	18
Net current-period other comprehensive income (loss)	(19)
Balance at March 30, 2013	(3,319)
Gains and Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012	1
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	(1)
Net current-period other comprehensive income (loss)	(1)
Balance at March 30, 2013	0
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012	2
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current-period other comprehensive income (loss)	0
Balance at March 30, 2013	2
Retirmenet Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012	(3,211)
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	19
Net current-period other comprehensive income (loss)	19
Balance at March 30, 2013	(3,192)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012	(92)
Other comprehensive loss before reclassifications	(37)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current-period other comprehensive income (loss)	(37)
Balance at March 30, 2013	$ (129)