Segment Information (Schedule Of Reportable Segment Data) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 1,617	$ 1,637	$ 3,352	$ 3,346
Percentage of total net revenue	100.00%	100.00%	100.00%	100.00%
Operating income	348	248	670	472
Consumer Security
Segment Reporting Information [Line Items]
Net revenue	485	518	1,018	1,042
Percentage of total net revenue	30.00%	32.00%	30.00%	31.00%
Operating income	257	225	525	449
Operating margin	53.00%	43.00%	52.00%	43.00%
Enterprise Security
Segment Reporting Information [Line Items]
Net revenue	511	517	1,063	1,061
Percentage of total net revenue	32.00%	31.00%	32.00%	32.00%
Operating income	85	80	155	138
Operating margin	17.00%	15.00%	15.00%	13.00%
Information Management
Segment Reporting Information [Line Items]
Net revenue	621	602	1,271	1,243
Percentage of total net revenue	38.00%	37.00%	38.00%	37.00%
Operating income	122	145	211	293
Operating margin	20.00%	24.00%	17.00%	24.00%
Operating Segments
Segment Reporting Information [Line Items]
Operating income	$ 464	$ 450	$ 891	$ 880