Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			69 Months Ended	0 Months Ended			1 Months Ended	0 Months Ended
	Apr. 03, 2015	Mar. 28, 2014	Mar. 29, 2013	Sep. 30, 2012	Jan. 26, 2015 patent	Dec. 08, 2010 patent	Feb. 06, 2015 patent	Oct. 30, 2014 patent	Apr. 22, 2015 patent
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 128	$ 121	$ 124
Loss Contingencies [Line Items]
Total net revenue	6,508	6,676	6,906
GSA Schedule Contract
Loss Contingencies [Line Items]
Total net revenue				222
GSA analysis of damage exposure	145
Current estimate of the low end of the range of estimated loss	25
Intellectual Ventures (IV) vs. Symantec | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed					3	4
Damages sought					299
Intellectual Ventures (IV) vs. Symantec | Judicial Ruling
Loss Contingencies [Line Items]
Number of patents dismissed from case								1
Number of patents found infringed							2
Damages awarded							17
Intellectual Ventures (IV) vs. Symantec, Patent One | Judicial Ruling
Loss Contingencies [Line Items]
Damages awarded							9
Intellectual Ventures (IV) vs. Symantec, Patent Two | Judicial Ruling
Loss Contingencies [Line Items]
Damages awarded							8
Subsequent Event | Intellectual Ventures (IV) vs. Symantec, Patent One | Judicial Ruling
Loss Contingencies [Line Items]
Number of patents found infringed									1
Number of patents issued in a court order holding noting invalidity									2
Damages previously awarded which are dismissed									$ (9)