Revenue - Impacts of Adoption of ASC 606 to Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Millions		Jan. 25, 2019	Apr. 27, 2018
ASSETS
Accounts receivable		$ 872	$ 1,047
Inventories		100	122
Other current assets		340	392
Other non-current assets		496	450
LIABILITIES AND STOCKHOLDERS' EQUITY
Short-term deferred revenue and financed unearned services revenue		1,641	1,712
Other long-term liabilities		898	992
Long-term deferred revenue and financed unearned services revenue		1,716	1,651
Retained earnings (accumulated deficit)		$ 0	(9)
As Previously Reported | ASC 606
ASSETS
Accounts receivable			1,009
Inventories			126
Other current assets			330
Other non-current assets			420
LIABILITIES AND STOCKHOLDERS' EQUITY
Short-term deferred revenue and financed unearned services revenue			1,804
Other long-term liabilities			961
Long-term deferred revenue and financed unearned services revenue			1,673
Retained earnings (accumulated deficit)			(218)
Impact of ASC 606 Adoption | ASC 606
ASSETS
Accounts receivable	[1]		38
Inventories			(4)
Other current assets	[2]		62
Other non-current assets	[2]		30
LIABILITIES AND STOCKHOLDERS' EQUITY
Short-term deferred revenue and financed unearned services revenue	[3]		(92)
Other long-term liabilities	[4]		31
Long-term deferred revenue and financed unearned services revenue	[3]		(22)
Retained earnings (accumulated deficit)	[5]		$ 209

[1] Netting of accounts receivable and deferred revenue balances for certain customer arrangements has been updated to reflect the impact of adoption

[2] Reflects capitalization of commissions and reduction of long-term deferred tax assets

[3] Reflects cumulative change in revenue and the impact of adoption to the netting of accounts receivable and deferred revenue balances for certain customer arrangements

[4] Reflects increase in long-term deferred tax liabilities

[5] Reflects cumulative impact to net income (loss)