Intangible Assets And Goodwill (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Dec. 31, 2013
Goodwill Activity
Aggregate goodwill	$ 3,095	$ 3,073
Accumulated impairment losses	(1,564)	(1,564)
Goodwill, net of impairment losses	1,531	1,509
Goodwill acquired	22
Government
Goodwill Activity
Aggregate goodwill	371	349
Accumulated impairment losses	0	0
Goodwill, net of impairment losses	371	349
Goodwill acquired	22
Enterprise
Goodwill Activity
Aggregate goodwill	2,724	2,724
Accumulated impairment losses	(1,564)	(1,564)
Goodwill, net of impairment losses	1,160	1,160
Goodwill acquired	$ 0