Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Apr. 03, 2015
Income Taxes [Line Items]
Pretax income (loss) from international operations	$ 353	$ 125	$ 41
Decrease in valuation allowance	(12)
Research and development credits	4
Alternative Minimum Tax credits	5
Foreign tax credit carry forwards	14
Unrecognized deferred tax liability	1,100
Cumulative unremitted foreign earnings	3,900
Change in gross unrecognized tax benefit	51	4	(89)
Unrecognized tax benefits which would affect the effective income tax rate	176
Accrued penalties and interest	22
Interest benefit included in the provision for income taxes	5
Tax benefit as a result of domestic tax settlement		59
Decrease of unrecognized tax benefits as a result of tax settlement	23	25	$ 150
Tax settlement related to transfer pricing matters		$ 158
Payment of final tax and interest liability on settlement	155
Potential affect on income tax provision	3
Veritas | Held-for-sale
Income Taxes [Line Items]
Provision for income taxes	1,100
Maximum
Income Taxes [Line Items]
Potential affect on income tax provision	4
Domestic | U.S. Federal
Income Taxes [Line Items]
Operating loss carryforwards	186
State
Income Taxes [Line Items]
Operating loss carryforwards	185
Tax credit carryforward	28
Foreign
Income Taxes [Line Items]
Operating loss carryforwards	$ 40