Intangible Assets And Goodwill (Goodwill) (Details) (USD $)	9 Months Ended
	Sep. 28, 2013	Dec. 31, 2012
Goodwill Activity
Aggregate goodwill	$ 3,071,000,000	$ 3,074,000,000
Accumulated impairment losses	(1,564,000,000)	(1,564,000,000)
Goodwill, net of impairment losses	1,507,000,000	1,510,000,000
Purchase accounting tax adjustment	(2,000,000)
Foreign currency	(1,000,000)
Government [Member]
Goodwill Activity
Aggregate goodwill	349,000,000	349,000,000
Accumulated impairment losses	0	0
Goodwill, net of impairment losses	349,000,000	349,000,000
Purchase accounting tax adjustment	0
Foreign currency	0
Enterprise [Member]
Goodwill Activity
Aggregate goodwill	2,722,000,000	2,725,000,000
Accumulated impairment losses	(1,564,000,000)	(1,564,000,000)
Goodwill, net of impairment losses	1,158,000,000	1,161,000,000
Purchase accounting tax adjustment	(2,000,000)
Foreign currency	$ (1,000,000)