Acquisitions (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Visual Analytics [Member]	Dec. 31, 2012 SafeNet Government Solutions [Member]	Dec. 31, 2012 SafeNet Government Solutions [Member]	Dec. 31, 2012 Teligy Inc. and Poseidon Scientific Instruments Pty ltd. [Member]	Dec. 31, 2011 Applied Signal Technology, Inc. [Member]	Dec. 31, 2011 Henggeler Computer Consultants Inc Pikewerks Corporation And Ktech Corporation [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 9	$ 301	$ 645		$ 280		$ 22	$ 500	$ 145
Goodwill	12,764	12,756	12,544	12	195	195	15	387	112
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	3	80	115	3	75	75	5	89	26
Cash acquired from acquisition								25
Tax deductible goodwill related to acquisitions	$ 273
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				7 years		8 years	6 years	7 years	7 years