Acquisitions and Divestitures (Income before Income Taxes) (Details) (Details) - Discontinued Operations, Disposed of by Sale - USD ($) $ in Millions	12 Months Ended
	Mar. 30, 2018	Mar. 31, 2017	Apr. 01, 2016
Website Security and Public Key Infrastructure Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income before income taxes	$ 66	$ 206
Veritas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	54	172	$ 1,968
Cost of revenues	(23)	(15)	(334)
Operating expenses	(21)	(26)	(1,270)
Gain on sale of Veritas	0	31	4,060
Other income (expense), net	0	1	3
Income from discontinued operations before income taxes	10	163	4,427
Income tax expense (benefit)	(1)	33	1,118
Income from discontinued operations, net of income taxes	$ 11	$ 130	$ 3,309