Segment and Geographic Information (Schedule Of Reportable Segment Data) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Apr. 03, 2015
Segment Reporting Information [Line Items]
Net revenues	$ 4,019	$ 3,600	$ 3,956
Operating income	(100)	457	154
Operating Segments
Segment Reporting Information [Line Items]
Net revenues	4,019	3,600	3,956
Operating income	1,026	1,026	1,275
Consumer Digital Safety: | Operating Segments
Segment Reporting Information [Line Items]
Net revenues	1,664	1,670	1,887
Operating income	839	924	982
Enterprise Security: | Operating Segments
Segment Reporting Information [Line Items]
Net revenues	2,355	1,930	2,069
Operating income	$ 187	$ 102	$ 293