Intangible Assets And Goodwill (Goodwill) (Details) (USD $)	3 Months Ended
	Mar. 30, 2013	Dec. 31, 2012
Goodwill Activity
Aggregate goodwill acquired/divested	$ 3,069,000,000	$ 3,074,000,000
Accumulated impairment losses	(1,564,000,000)	(1,564,000,000)
Goodwill, net of impairment losses	1,505,000,000	1,510,000,000
Foreign currency	(5,000,000)
Government [Member]
Goodwill Activity
Aggregate goodwill acquired/divested	349,000,000	349,000,000
Accumulated impairment losses	0	0
Goodwill, net of impairment losses	349,000,000	349,000,000
Foreign currency	0
Enterprise [Member]
Goodwill Activity
Aggregate goodwill acquired/divested	2,720,000,000	2,725,000,000
Accumulated impairment losses	(1,564,000,000)	(1,564,000,000)
Goodwill, net of impairment losses	1,156,000,000	1,161,000,000
Foreign currency	$ (5,000,000)