Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 27, 2018	Dec. 31, 2017	Apr. 27, 2018	Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Income Tax Contingency [Line Items]
U.S. federal corporate tax rate	21.00%	35.00%	30.50%
Tax expense related to tax rate changes			$ 126
Percentage of transition tax on accumulated foreign earnings and profits, due to TCJA			15.50%
Percentage of transition tax on remaining foreign earnings due to TCJA			8.00%
Tax expense for the estimated U.S. federal and state income tax impacts of the transition tax			$ 732	$ 0	$ 0
Payment period for one-time transition tax			8 years
Provision for income taxes			$ 1,090	156	116
Deferred tax assets, increase/decrease in valuation allowance			$ 15
Operating loss and credit carryforwards, expiration dates range, minimum			2019
Operating loss and credit carryforwards, expiration dates range, maximum			2038
Gross unrecognized tax benefits	$ 348		$ 348	218	216	$ 272
Gross unrecognized tax benefits included in other long-term liabilities	318		318
Unrecognized tax benefits that would affect provision for income taxes	294		294
Provisional gross unrecognized tax benefits	114		114
Tax penalties and interest on unrecognized tax benefits			5	5	2
Accrued tax penalties and interest on unrecognized tax benefits	22		22	16
Resolution of income tax examinations			0	0	20
Federal Income Tax
Income Tax Contingency [Line Items]
Operating loss carry forwards	7		7
Tax credit carry forward amount	3		3
Resolution of income tax examinations					23
State and Local Income Tax
Income Tax Contingency [Line Items]
Operating loss carry forwards	29		29
Tax credit carry forward amount	146		146
Foreign Income Tax
Income Tax Contingency [Line Items]
Operating loss carry forwards	4		4
Tax credit carry forward amount	$ 28		28
SolidFire
Income Tax Contingency [Line Items]
Tax charge from integration of intellectual properties from the SolidFire acquisition			$ 0	0	$ 64
Accounting Standards Update 2016-09
Income Tax Contingency [Line Items]
Provision for income taxes				$ 18