Segment and Geographic Information (Schedule Of Product Revenue Information) (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2017	Apr. 01, 2016	Apr. 03, 2015
Revenue from External Customer [Line Items]
Total product revenue		$ 4,019	$ 3,600	$ 3,956
Norton
Revenue from External Customer [Line Items]
Total product revenue		1,597	1,670	1,887
Threat protection
Revenue from External Customer [Line Items]
Total product revenue		804	807	882
Blue Coat security
Revenue from External Customer [Line Items]
Total product revenue		427	0	0
Others
Revenue from External Customer [Line Items]
Total product revenue	[1]	$ 1,191	$ 1,123	$ 1,187

[1] No other product category represented more than 10% of the respective totals.