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Segment, Geographic, and Significant Customer Information - Schedule of Financial Information by Segment (Parenthetical) (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 29, 2022	Apr. 30, 2021	Apr. 24, 2020
Segment Reporting [Abstract]
Unallocated cost of revenue stock-based compensation expense	$ 17	$ 14	$ 13
Unallocated cost of revenue amortization of intangible assets	$ 33	$ 41	$ 39

X

- Definition

Unallocated cost of revenue amortization of intangible assets.

+ References

No definition available.

+ Details

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

X

- Definition

Unallocated cost of revenue stock-based compensation expense.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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