Acquisitions and Divestitures (Divestiture Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 31, 2017	Mar. 29, 2019	Mar. 30, 2018	Mar. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)		$ 92	$ (690)	$ (26)
Website Security and Public Key Infrastructure Businesses | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration	$ 1,100
Proceeds from divestiture of businesses	951
Foreign currency translation gains (losses)	(8)
Transaction costs	8
Income tax expense (benefit)	123
Gain on sale of short-term investment	$ 7
Website Security and Public Key Infrastructure Businesses | Discontinued Operations, Disposed of by Sale | DigiCert
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business disposal, non-cash consideration received	28.00%
Equity interests issued and issuable, consideration received	$ 160