Employee Benefits and Deferred Compensation - Additional Information (Detail)	12 Months Ended
Apr. 26, 2024 USD ($)
Defined Contribution Plan Disclosure [Line Items]
Employee 401(k) Plan, Description	An employee receives the full 4% match when he/she contributes at least 6% of his/her eligible earnings, up to a maximum calendar year matching contribution of $6,000.
Employee contribution percentage	6.00%
Maximum amount of matching contribution	$ 6,000
Contribution Match First 2% Eligible Earnings Employee
Defined Contribution Plan Disclosure [Line Items]
Percentage of employee contributions matched	100.00%
Percentage of earnings on employee contributions matched	2.00%
Contribution Match Next 4% Eligible Earnings Employee
Defined Contribution Plan Disclosure [Line Items]
Percentage of employee contributions matched	50.00%
Percentage of earnings on employee contributions matched	4.00%

Employee contribution percentage.

No definition available.

Name:	ntap_EmployeeContributionPercentage
Namespace Prefix:	ntap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum Amount Of Matching Contributions Per Employee

+ References

No definition available.

+ Details

Name:	ntap_MaximumAmountOfMatchingContributionsPerEmployee
Namespace Prefix:	ntap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480794/715-70-50-1

+ Details

Name:	us-gaap_DefinedContributionPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of defined contribution pension and other postretirement plans.

+ References

No definition available.

+ Details

Name:	us-gaap_DescriptionOfDefinedContributionPensionAndOtherPostretirementPlans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RetirementPlanTypeAxis=ntap_FirstContributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RetirementPlanTypeAxis=ntap_SecondContributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: