Segment Information (Schedule Of Reportable Segment Data) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Net revenue	$ 1,653	$ 1,433
Percentage of total net revenue	100.00%	100.00%
Operating income (loss)	302	194
Consumer [Member]
Net revenue	525	473
Percentage of total net revenue	32.00%	33.00%
Operating income (loss)	255	225
Operating margin of segment	49.00%	48.00%
Security And Compliance [Member]
Net revenue	468	357
Percentage of total net revenue	28.00%	25.00%
Operating income (loss)	90	83
Operating margin of segment	19.00%	23.00%
Storage And Server Management [Member]
Net revenue	597	524
Percentage of total net revenue	36.00%	36.00%
Operating income (loss)	278	240
Operating margin of segment	47.00%	46.00%
Services [Member]
Net revenue	63	79
Percentage of total net revenue	4.00%	6.00%
Operating income (loss)	8	(1)
Operating margin of segment	13.00%	(1.00%)
Other Segment [Member]
Net revenue	0
Percentage of total net revenue	0.00%	0.00%
Operating income (loss)	$ (329)	$ (353)