(Schedule of Reportable Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 29, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net revenues	$ 1,156	$ 1,175
Operating income	2	(44)
Operating Segments
Segment Reporting Information [Line Items]
Net revenues	1,156	1,175
Operating income	319	324
Operating Segments | Total Enterprise Security
Segment Reporting Information [Line Items]
Net revenues	556	646
Operating income	56	94
Operating Segments | Consumer Digital Safety:
Segment Reporting Information [Line Items]
Net revenues	600	529
Operating income	$ 263	$ 230