NetApp (NTAP) 10-Q 19 Nov 18 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Oct. 26, 2018	Nov. 14, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 26, 2018
Document Fiscal Year Focus	2,019
Document Fiscal Period Focus	Q2
Trading Symbol	NTAP
Entity Registrant Name	NetApp, Inc.
Entity Central Index Key	1,002,047
Current Fiscal Year End Date	--04-26
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		251,885,962

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Current assets:
Cash and cash equivalents	$ 2,359	$ 2,941
Short-term investments	1,940	2,450
Accounts receivable	765	1,047
Inventories	86	122
Other current assets	321	392
Total current assets	5,471	6,952
Property and equipment, net	770	756
Goodwill	1,742	1,739
Other intangible assets, net	69	94
Other non-current assets	499	450
Total assets	8,551	9,991
Current liabilities:
Accounts payable	472	609
Accrued expenses	652	825
Commercial paper notes	249	385
Current portion of long-term debt	399	0
Short-term deferred revenue and financed unearned services revenue	1,538	1,712
Total current liabilities	3,310	3,531
Long-term debt	1,144	1,541
Other long-term liabilities	899	992
Long-term deferred revenue and financed unearned services revenue	1,668	1,651
Total liabilities	7,021	7,715
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock and additional paid-in capital, $0.001 par value; 254 and 263 shares issued and outstanding as of October 26, 2018 and April 27, 2018	1,605	2,355
Retained earnings (accumulated deficit)	0	(9)
Accumulated other comprehensive loss	(75)	(70)
Total stockholders' equity	1,530	2,276
Total liabilities and stockholders' equity	$ 8,551	$ 9,991

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares shares in Millions	Oct. 26, 2018	Apr. 27, 2018
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	254	263
Common stock, shares outstanding	254	263

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Revenues:
Net revenues	$ 1,517	$ 1,415	$ 2,991	$ 2,736
Cost of revenues:
Total cost of revenues	543	515	1,054	1,012
Gross profit	974	900	1,937	1,724
Operating expenses:
Sales and marketing	408	421	817	844
Research and development	211	194	419	387
General and administrative	69	69	142	137
Restructuring charges	0	0	19	0
Total operating expenses	688	684	1,397	1,368
Income from operations	286	216	540	356
Other income, net	7	6	25	11
Income before income taxes	293	222	565	367
Provision for income taxes	52	48	41	62
Net income	$ 241	$ 174	$ 524	$ 305
Net income per share:
Basic	$ 0.93	$ 0.65	$ 2.02	$ 1.13
Diluted	$ 0.91	$ 0.63	$ 1.96	$ 1.10
Shares used in net income per share calculations:
Basic	258	269	260	270
Diluted	264	275	267	277
Cash dividends declared per share	$ 0.40	$ 0.20	$ 0.80	$ 0.40
Product [Member]
Revenues:
Net revenues	$ 913	$ 819	$ 1,788	$ 1,546
Cost of revenues:
Total cost of revenues	428	397	826	773
Software Maintenance [Member]
Revenues:
Net revenues	236	224	465	447
Cost of revenues:
Total cost of revenues	8	6	15	13
Hardware Maintenance and Other Services [Member]
Revenues:
Net revenues	368	372	738	743
Cost of revenues:
Total cost of revenues	$ 107	$ 112	$ 213	$ 226

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 241	$ 174	$ 524	$ 305
Other comprehensive income (loss):
Foreign currency translation adjustments	(3)	(2)	(3)	8
Defined benefit obligations:
Reclassification adjustments related to defined benefit obligations	(1)	(1)	(1)	(1)
Income tax effect	0	1	0	1
Unrealized gains (losses) on available-for-sale securities:
Unrealized holding gains (losses) arising during the period	(1)	(4)	(1)	2
Other comprehensive income (loss)	(5)	(6)	(5)	10
Comprehensive income	$ 236	$ 168	$ 519	$ 315

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Cash flows from operating activities:
Net income	$ 524	$ 305
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	98	102
Stock-based compensation	78	87
Deferred income taxes	(25)	40
Other items, net	11	(5)
Changes in assets and liabilities, net of acquisitions of businesses:
Accounts receivable	269	146
Inventories	36	58
Other operating assets	(19)	29
Accounts payable	(127)	34
Accrued expenses	(162)	(68)
Deferred revenue and financed unearned services revenue	(129)	(163)
Long-term taxes payable	(63)	2
Other operating liabilities	0	(3)
Net cash provided by operating activities	491	564
Cash flows from investing activities:
Purchases of investments	(20)	(609)
Maturities, sales and collections of investments	509	657
Purchases of property and equipment	(107)	(65)
Acquisitions of businesses, net of cash acquired	(3)	(75)
Other investing activities, net	2	0
Net cash provided by (used in) investing activities	381	(92)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock award plans	65	57
Payments for taxes related to net share settlement of stock awards	(89)	(60)
Repurchase of common stock	(1,061)	(300)
Proceeds from (repayments of) commercial paper notes, net	(135)	218
Issuance of long-term debt, net	0	795
Dividends paid	(207)	(108)
Other financing activities, net	(2)	(1)
Net cash provided by (used in) financing activities	(1,429)	601
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(25)	13
Net increase (decrease) in cash, cash equivalents and restricted cash	(582)	1,086
Cash, cash equivalents and restricted cash:
Beginning of period	2,947	2,450
End of period	$ 2,365	$ 3,536

Description of Business and Sig

Description of Business and Significant Accounting Policies	6 Months Ended
	Oct. 26, 2018
Accounting Policies [Abstract]
Description of Business and Significant Accounting Policies	1. Description of Business and Significant Accounting Policies NetApp, Inc. (we, us, or the Company) provides global organizations the ability to manage and share their data across on-premises, private and public clouds. Together with our partners, we provide a full range of enterprise-class software, systems and services solutions that customers use to modernize their infrastructures, build next generation data centers and harness the power of hybrid clouds. Basis of Presentation and Preparation Our fiscal year is reported on a 52- or 53-week year ending on the last Friday in April. An additional week is included in the first fiscal quarter approximately every six years to realign fiscal months with calendar months. Fiscal years 2019 and 2018, ending on April 26, 2019, and April 27, 2018, respectively, are each 52-week years, with 13 weeks in each of their quarters. The accompanying unaudited condensed consolidated financial statements have been prepared by the Company, and reflect all adjustments, consisting only of normal recurring adjustments, that are, in the opinion of management, necessary for the fair presentation of our financial position, results of operations, comprehensive income and cash flows for the interim periods presented. The statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information. Accordingly, these statements do not include all information and footnotes required by GAAP for annual consolidated financial statements, and should be read in conjunction with our audited consolidated financial statements as of and for the fiscal year ended April 27, 2018 contained in our Annual Report on Form 10-K. The results of operations for the three and six months ended October 26, 2018 are not necessarily indicative of the operating results to be expected for the full fiscal year or future operating periods. The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Such estimates include, but are not limited to, revenue recognition, reserves and allowances; inventory valuation and purchase order accruals; valuation of goodwill and intangibles; restructuring reserves; product warranties; employee compensation and benefit accruals; stock-based compensation; loss contingencies; valuation of investment securities; income taxes and fair value measurements. Actual results could differ materially from those estimates. Accounting Changes In May 2014, the Financial Accounting Standards Board (FASB) issued a new standard, Revenue from Contracts with Customers (ASC 606) In October 2016, the FASB issued an accounting standards update (ASU) which eliminates the deferred tax effects of intra-entity asset transfers other than inventory. As a result, tax expense from the sale of an asset in the seller’s tax jurisdiction is recognized when the transfer occurs, even though the pre-tax effects of that transaction are eliminated in consolidation. In the first quarter of fiscal 2019, we adopted this ASU using a modified retrospective transition approach and recorded a cumulative-effect adjustment to decrease retained earnings by $51 million, with a corresponding reduction of prepaid taxes, which were classified as other non-current assets on our condensed consolidated balance sheets. In November 2016, the FASB issued an ASU that requires a statement of cash flows to explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. In the first quarter of fiscal 2019, we adopted this ASU using a retrospective transition method. Accordingly, our condensed consolidated statement of cash flows for the three and six months ended October 27, 2017, as presented herein, has been restated to comply with the new requirements. Refer to Note 4 – Supplemental Financial Information for a detail of the components of our cash, cash equivalents and restricted cash balances. There have been no other significant changes in our significant accounting policies as of and for the six months ended October 26, 2018, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended April 27, 2018.

Recent Accounting Standards Not

Recent Accounting Standards Not Yet Effective	6 Months Ended
	Oct. 26, 2018
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Standards Not Yet Effective	2. Recent Accounting Standards Not Yet Effective Leases In February 2016, the FASB issued an accounting standards update on financial reporting for leasing arrangements, including requiring lessees to recognize an operating lease with a term greater than one year on their balance sheets as a right-of-use asset and corresponding lease liability, measured at the present value of the lease payments. This new standard will be effective for us in our first quarter of fiscal 2020, although early adoption is permitted. Upon adoption, the new standard, as amended, allows lessees to apply the transition requirements either (1) retrospectively to each prior reporting period presented in the financial statements with the cumulative effect of applying the new rules recognized at the beginning of the earliest comparative period presented, or (2) retrospectively at the beginning of the period of adoption with the cumulative effect of applying the new rules recognized then. We are currently in the assessment phase to determine the adoption methodology and are evaluating the impact of this new standard on our consolidated financial statements and disclosures. We expect that most of our operating lease commitments will be subject to the new standard and recognized as lease liabilities and right-of-use assets upon adoption, which will increase the total assets and total liabilities we report. Credit Losses on Financial Instruments In June 2016, the FASB issued an accounting standards update on the measurement of credit losses on financial instruments. The standard introduces a new model for measuring and recognizing credit losses on financial instruments, requiring financial assets measured at amortized cost basis to be presented at the net amount expected to be collected.

Goodwill and Purchased Intangib

Goodwill and Purchased Intangible Assets, Net	6 Months Ended
	Oct. 26, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Purchased Intangible Assets, Net	3. Goodwill and Purchased Intangible Assets, Net Goodwill activity is summarized as follows (in millions): Balance as of April 27, 2018 $ 1,739 Additions 3 Balance as of October 26, 2018 $ 1,742 On September 17, 2018, we acquired all of the outstanding shares of a privately-held software company for $3 million in cash. Substantially all of the purchase price was recorded to goodwill. Purchased intangible assets, net are summarized below (in millions): October 26, 2018 April 27, 2018 Gross Accumulated Net Gross Accumulated Net Assets Amortization Assets Assets Amortization Assets Developed technology $ 160 $ (95 ) $ 65 $ 164 $ (80 ) $ 84 Customer contracts/relationships 41 (37 ) 4 43 (33 ) 10 Other purchased intangibles — — — 9 (9 ) — Total purchased intangible assets $ 201 $ (132 ) $ 69 $ 216 $ (122 ) $ 94 Amortization expense for purchased intangible assets is summarized below (in millions): Three Months Ended Six Months Ended Statements of October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Operations Classification Developed technology $ 9 $ 9 $ 18 $ 17 Cost of revenues Customer contracts/relationships 3 4 7 8 Operating expenses Other purchased intangibles — 1 — 2 Operating expenses Total $ 12 $ 14 $ 25 $ 27 As of October 26, 2018, future amortization expense related to purchased intangible assets is as follows (in millions): Fiscal Year Amount Remainder of 2019 $ 22 2020 31 2021 16 Total $ 69

Supplemental Financial Informat

Supplemental Financial Information	6 Months Ended
	Oct. 26, 2018
Supplemental Financial Information [Abstract]
Supplemental Financial Information	4 . Supplemental Financial Information Cash, cash equivalents and restricted cash (in millions): The following table presents cash and cash equivalents as reported in our condensed consolidated balance sheets, as well as the sum of cash, cash equivalents and restricted cash as reported on our condensed consolidated statement of cash flows in accordance with our adoption of the ASU discussed in Note 1 – Description of Business and Significant Accounting Policies: October 26, 2018 April 27, 2018 Cash $ 2,251 $ 2,727 Cash equivalents 108 214 Cash and cash equivalents $ 2,359 $ 2,941 Short-term restricted cash 5 5 Long-term restricted cash 1 1 Restricted cash $ 6 $ 6 Cash, cash equivalents and restricted cash $ 2,365 $ 2,947 Inventories (in millions): October 26, 2018 April 27, 2018 Purchased components $ 12 $ 12 Finished goods 74 110 Inventories $ 86 $ 122 Property and equipment, net (in millions): October 26, 2018 April 27, 2018 Land $ 106 $ 106 Buildings and improvements 604 594 Leasehold improvements 87 88 Computer, production, engineering and other equipment 786 733 Computer software 357 357 Furniture and fixtures 104 99 Construction-in-progress 8 27 2,052 2,004 Accumulated depreciation and amortization (1,282 ) (1,248 ) Property and equipment, net $ 770 $ 756 In September 2017, we entered into an agreement to sell certain land and buildings located in Sunnyvale, California, through two separate and independent closings, the first of which was completed in the third quarter of fiscal 2018. The remaining properties, consisting of land with a net book value of $52 million, were classified as assets held for sale, and included as other current assets in our condensed consolidated balance sheets as of October 26, 2018 and April 27, 2018. We will consummate the sale of these properties, and receive cash proceeds of $96 million, upon the completion of the second closing, which is expected to occur within the next 12 months. That closing is subject to due diligence, certain termination rights and customary closing conditions, including local governmental approval of the subdivision of a land parcel. Other non-current assets (in millions): October 26, 2018 April 27, 2018 Deferred tax assets $ 223 $ 229 Other assets 276 221 Other non-current assets $ 499 $ 450 Accrued expenses (in millions): October 26, 2018 April 27, 2018 Accrued compensation and benefits $ 314 $ 441 Product warranty liabilities 26 25 Other current liabilities 312 359 Accrued expenses $ 652 $ 825 Product warranty liabilities: Equipment and software systems sales include a standard product warranty. The following tables summarize the activity related to product warranty liabilities and their balances as reported in our condensed consolidated balance sheets (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Balance at beginning of period $ 38 $ 44 $ 40 $ 50 Expense accrued during the period 6 7 10 8 Warranty costs incurred (5 ) (7 ) (11 ) (14 ) Balance at end of period $ 39 $ 44 $ 39 $ 44 October 26, 2018 April 27, 2018 Accrued expenses $ 26 $ 25 Other long-term liabilities 13 15 Total warranty liabilities $ 39 $ 40 Warranty expense accrued during the period includes amounts accrued for systems at the time of shipment, adjustments for changes in estimated costs for warranties on systems shipped in the period and changes in estimated costs for warranties on systems shipped in prior periods. Other long-term liabilities (in millions): October 26, 2018 April 27, 2018 Liability for uncertain tax positions $ 324 $ 314 Income taxes payable 476 549 Product warranty liabilities 13 15 Other liabilities 86 114 Other long-term liabilities $ 899 $ 992 Statements of cash flows additional information (in millions): Non-cash investing and financing activities and supplemental cash flow information are as follows: Six Months Ended October 26, 2018 October 27, 2017 Non-cash Investing and Financing Activities: Capital expenditures incurred but not paid $ 7 $ 17 Supplemental Cash Flow Information: Income taxes paid, net of refunds $ 104 $ 28 Interest paid $ 26 $ 24

Revenue

Revenue	6 Months Ended
	Oct. 26, 2018
Revenue From Contract With Customer [Abstract]
Revenue	5. Revenue Effective our first quarter of fiscal 2019, we adopted ASC 606 using the full retrospective method and have restated each prior reporting period presented to conform to the new rules. The most significant impact of the new standard relates to our accounting for arrangements containing software. For our enterprise software license agreements (ELAs), we now recognize the license fee component of such arrangements up front. Under the prior rules, the software license fee was recognized over the term of the enterprise license based on our inability to establish vendor specific objective evidence of fair value for the undelivered software support element of these arrangements. In addition, for other software arrangements, revenue deferred for the undelivered elements that was previously allocated based on the residual method is now allocated based on relative fair value, which generally results in more software arrangement revenue being recognized earlier. The new standard also impacts our estimation of variable consideration for certain arrangements with contract terms such as rights of return, potential penalties and acceptance clauses. The following table presents the impacts of adoption of ASC 606 to select line items of our condensed consolidated balance sheet as of the end of fiscal 2018: As of April 27, 2018 As Previously Reported Impact of ASC 606 Adoption As Adjusted ASSETS Accounts receivable $ 1,009 $ 38 (1 ) $ 1,047 Inventories $ 126 $ (4 ) $ 122 Other current assets $ 330 $ 62 (2 ) $ 392 Other non-current assets $ 420 $ 30 (2 ) $ 450 LIABILITIES AND STOCKHOLDERS' EQUITY Short-term deferred revenue and financed unearned services revenue $ 1,804 $ (92 ) (3 ) $ 1,712 Other long-term liabilities $ 961 $ 31 (4 ) $ 992 Long-term deferred revenue and financed unearned services revenue $ 1,673 $ (22 ) (3 ) $ 1,651 Accumulated deficit $ (218 ) $ 209 (5 ) $ (9 ) (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) The following table presents the impacts of adoption of ASC 606 to our statement of operations for the second quarter and first six months of fiscal 2018: Three Months Ended Six Months Ended October 27, 2017 October 27, 2017 As Previously Reported Impact of ASC 606 Adoption As Adjusted As Previously Reported Impact of ASC 606 Adoption As Adjusted Revenues: Product $ 807 $ 12 $ 819 $ 1,530 $ 16 $ 1,546 Software maintenance 240 (16 ) 224 474 (27 ) 447 Hardware maintenance and other services 375 (3 ) 372 743 — 743 Net revenues 1,422 (7 ) 1,415 2,747 (11 ) 2,736 Cost of revenues: Cost of product 399 (2 ) 397 770 3 773 Cost of software maintenance 6 — 6 13 — 13 Cost of hardware maintenance and other services 115 (3 ) 112 228 (2 ) 226 Total cost of revenues 520 (5 ) 515 1,011 1 1,012 Gross profit 902 (2 ) 900 1,736 (12 ) 1,724 Operating expenses: Sales and marketing 420 1 421 845 (1 ) 844 Research and development 194 — 194 387 — 387 General and administrative 69 — 69 137 — 137 Total operating expenses 683 1 684 1,369 (1 ) 1,368 Income from operations 219 (3 ) 216 367 (11 ) 356 Other income, net 6 — 6 11 — 11 Income before income taxes 225 (3 ) 222 378 (11 ) 367 Provision for income taxes 50 (2 ) 48 67 (5 ) 62 Net income $ 175 $ (1 ) $ 174 $ 311 $ (6 ) $ 305 Net income per share: Basic $ 0.65 $ — $ 0.65 $ 1.15 $ (0.02 ) $ 1.13 Diluted $ 0.64 $ (0.01 ) $ 0.63 $ 1.12 $ (0.02 ) $ 1.10 Shares used in net income per share calculations: Basic 269 269 269 270 270 270 Diluted 275 275 275 277 277 277 The adoption of ASC 606 had no impact to cash provided by or used in operating, investing or financing activities as presented on our condensed consolidated statement of cash flows. The core principle of ASC 606 is to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration the entity expects to be entitled in exchange for those goods or services. This principle is achieved through applying the following five-step approach. • Identification of the contract, or contracts, with a customer — A contract with a customer exists when (i) we enter into an enforceable contract with a customer that (ii) defines each party’s rights regarding the goods or services to be transferred and (iii) identifies the payment terms related to these goods or services. Additionally, (iv) the contract has commercial substance and, (v) we determine that collection of substantially all consideration for goods or services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. We apply judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors including the customer’s historical payment experience or, in the case of a new customer, published credit and financial information pertaining to the customer. We also combine two or more contracts entered into at or near the same time with the same customer as a single contract if the contracts are negotiated as one package with a single commercial objective, the amount of consideration to be paid on one contract depends on the price or performance of the other contract or if the goods and services promised in each of the contracts are a single performance obligation. • Identification of the performance obligations in the contract — Performance obligations promised in a contract are identified based on the goods or services (or a bundle of goods and services) that will be transferred to the customer that are distinct. A good or service is distinct if it is capable of being distinct, where the customer can benefit from the goods or service either on its own or together with other resources that are readily available from third parties or from us, and is distinct in the context of the contract, meaning the transfer of the goods or services is separately identifiable from other promises in the contract. To the extent a contract includes multiple promised goods or services, we apply judgment to determine whether promised goods or services are capable of being distinct and distinct in the context of the contract. If these criteria are not met, we combine the goods and services until we have a distinct performance obligation. • Determination of the transaction price — The transaction price is determined based on the consideration to which we will be entitled in exchange for transferring goods or services to the customer. Consideration promised may include fixed amounts, variable amounts or both. We use judgment in determining variable consideration, particularly if consideration is contingent on the occurrence or nonoccurrence of a future event. We use the expected value, primarily relying on our history, to estimate variable consideration. We may also use, in certain situations, the most likely amount as the basis of our estimate. In either case, we consider variable consideration only to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur. Reassessments of our variable consideration may occur as historical information changes. Transaction prices should also be adjusted for the effects of time value of money if the timing of payments provides either the customer or ourselves a significant benefit of financing. • Allocation of the transaction price to the performance obligations in the contract — If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price basis. We determine standalone selling price based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, we estimate the standalone selling price taking into account available information such as market conditions and internally approved pricing guidelines related to the performance obligations. Variable consideration is also allocated to the performance obligations. If the terms of variable consideration relate to one performance obligation, it is entirely allocated to that obligation. Otherwise, it is allocated to all the performance obligations in the contract. • Recognition of revenue when, or as, we satisfy a performance obligation — We satisfy performance obligations either over time or at a point in time. We typically recognize revenue at a point in time for promises to transfer goods to a customer. Services are typically transferred over time based on an appropriate method for measuring our progress toward completion of that performance obligation. Our stand-ready services, including both hardware and software maintenance support, are transferred ratably over the period of the contract. For other services such as our fixed professional services contract, we use an input method to determine the percentage of completion. That is, we estimate the effort to date versus the expected effort required over the life of the contract. Disaggregation of revenue To provide visibility into our transition from older products to our newer, higher growth products and clarity into the dynamics of our product revenue, we have historically grouped our products by “Strategic” and “Mature” solutions. Strategic solutions include Clustered ONTAP, branded E-Series, SolidFire, converged and hyper-converged infrastructure, ELAs The following table depicts the disaggregation of revenue by our products and services (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Product revenues $ 913 $ 819 $ 1,788 $ 1,546 Strategic 649 566 1,261 1,064 Mature 264 253 527 482 Software maintenance revenues 236 224 465 447 Hardware maintenance and other services revenues 368 372 738 743 Hardware maintenance support contracts 303 306 606 604 Professional and other services 65 66 132 139 Net revenues $ 1,517 $ 1,415 $ 2,991 $ 2,736 Revenues by geographic region are presented in Note 14 – Segment, Geographic, and Significant Customer Information. Deferred revenue and financed unearned services revenue The following table summarizes the components of our deferred revenue and financed unearned services balance as reported in our condensed consolidated balance sheets (in millions): October 26, 2018 April 27, 2018 Deferred product revenue $ 102 $ 107 Deferred services revenue 3,010 3,134 Financed unearned services revenue 94 122 Total $ 3,206 $ 3,363 Reported as: Short-term $ 1,538 $ 1,712 Long-term 1,668 1,651 Total $ 3,206 $ 3,363 Deferred product revenue represents unrecognized revenue related to undelivered product commitments and other product deliveries that have not met all revenue recognition criteria. Deferred services revenue represents customer payments made in advance for services, which include software and hardware maintenance contracts and other services. Financed unearned services revenue represents undelivered services for which cash has been received under certain third-party financing arrangements. See Note 15 – Commitments and Contingencies for additional information related to these arrangements. The following tables summarize the activity related to deferred revenue and financed unearned services revenue (in millions): Six Months Ended October 26, 2018 October 27, 2017 Balance at beginning of period $ 3,363 $ 3,213 Additions 1,067 1,031 Revenue recognized during the period (1,224 ) (1,185 ) Balance at end of period $ 3,206 $ 3,059 During the six months ended October 26, 2018 and October 27, 2017, we recognized $1,019 million and $1,017 million, respectively, that was included in the deferred revenue and financed unearned services revenue balance at the beginning of the respective periods. As of October 26, 2018, the aggregate amount of the transaction price allocated to the remaining performance obligations related to customer contracts that are unsatisfied or partially unsatisfied was $3,206 million, which is equivalent to our deferred revenue and unearned services revenue balance. Because customer orders are typically placed on an as-needed basis, and cancellable without penalty prior to shipment, orders in backlog may not be a meaningful indicator of future revenue and have not been included in this amount. We expect to recognize as revenue approximately 48% of our deferred revenue and financed unearned services revenue balance in the next 12 months, approximately 27% in the next 13 to 24 months, and the remainder thereafter. Deferred commissions As a result of our adoption of ASC 606 in the first quarter of fiscal 2019, we capitalize sales commissions that are incremental direct costs of obtaining customer contracts for which revenue is not immediately recognized and classify them as current or non-current based on the terms of the related contracts. Capitalized commissions are amortized based on the transfer of goods or services to which they relate, typically over one to three years, and are also periodically reviewed for impairment. Amortization expense is recorded to sales and marketing expense in our condensed consolidated statements of operations. The following tables summarize the activity related to deferred commissions and their balances as reported in our condensed consolidated balance sheets (in millions): Six Months Ended October 26, 2018 October 27, 2017 Balance at beginning of period $ 137 $ 113 Additions 35 34 Expense recognized during the period (41 ) (32 ) Balance at end of period $ 131 $ 115 October 26, 2018 April 27, 2018 Other current assets $ 61 $ 66 Other non-current assets 70 71 Total deferred commissions $ 131 $ 137

Other Income, Net

Other Income, Net	6 Months Ended
	Oct. 26, 2018
Nonoperating Income Expense [Abstract]
Other Income, Net	6. Other income, net Other income, net consists of the following (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Interest income $ 21 $ 19 $ 46 $ 35 Interest expense (14 ) (17 ) (28 ) (30 ) Other income, net — 4 7 6 Total other income, net $ 7 $ 6 $ 25 $ 11

Financial Instruments and Fair

Financial Instruments and Fair Value Measurements	6 Months Ended
	Oct. 26, 2018
Investments Debt And Equity Securities [Abstract]
Financial Instruments and Fair Value Measurements	7. Financial Instruments and Fair Value Measurements The accounting guidance for fair value measurements provides a framework for measuring fair value on either a recurring or nonrecurring basis, whereby the inputs used in valuation techniques are assigned a hierarchical level. The following are the three levels of inputs to measure fair value: Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2: Inputs that reflect quoted prices for identical assets or liabilities in less active markets; quoted prices for similar assets or liabilities in active markets; benchmark yields, reported trades, broker/dealer quotes, inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3: Unobservable inputs that reflect our own assumptions incorporated in valuation techniques used to measure fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. We consider an active market to be one in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis, and consider an inactive market to be one in which there are infrequent or few transactions for the asset or liability, the prices are not current, or price quotations vary substantially either over time or among market makers. Where appropriate, our own or the counterparty’s non-performance risk is considered in measuring the fair values of liabilities and assets, respectively. Investments The following is a summary of our investments (in millions): October 26, 2018 April 27, 2018 Cost or Estimated Cost or Estimated Amortized Gross Unrealized Fair Amortized Gross Unrealized Fair Cost Gains Losses Value Cost Gains Losses Value Corporate bonds $ 1,614 $ — $ (40 ) $ 1,574 $ 1,865 $ 1 $ (39 ) $ 1,827 U.S. Treasury and government debt securities 362 — (4 ) 358 497 — (5 ) 492 Commercial paper — — — — 230 — — 230 Certificates of deposit 116 — — 116 115 — — 115 Mutual funds 34 — — 34 31 — — 31 Total debt and equity securities $ 2,126 $ — $ (44 ) $ 2,082 $ 2,738 $ 1 $ (44 ) $ 2,695 As of October 26, 2018 and April 27, 2018, the unrealized losses on our available-for-sale investments were caused by market value declines as a result of increasing market interest rates. Because the declines in market value are attributable to changes in market conditions and not credit quality, and because we have determined that (i) we do not have the intent to sell any of these investments and (ii) it is not more likely than not that we will be required to sell any of these investments before recovery of the entire amortized cost basis, we have determined that no other-than-temporary impairments were required to be recognized on these investments as of October 26, 2018 and April 27, 2018. The following table presents the contractual maturities of our debt investments as of October 26, 2018 (in millions): Amortized Cost Fair Value Due in one year or less $ 679 $ 676 Due after one year through five years 835 821 Due after five years through ten years 578 551 $ 2,092 $ 2,048 Actual maturities may differ from the contractual maturities because borrowers may have the right to call or prepay certain obligations. Fair Value of Financial Instruments The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis (in millions): October 26, 2018 Fair Value Measurements at Reporting Date Using Total Level 1 Level 2 Cash $ 2,251 $ 2,251 $ — Corporate bonds 1,574 — 1,574 U.S. Treasury and government debt securities 358 190 168 Certificates of deposit 116 — 116 Total cash, cash equivalents and short-term investments $ 4,299 $ 2,441 $ 1,858 Other items: Mutual funds (1) $ 6 $ 6 $ — Mutual funds (2) $ 28 $ 28 $ — Foreign currency exchange contracts assets (1) $ 5 $ — $ 5 Foreign currency exchange contracts liabilities (3) $ (3 ) $ — $ (3 ) (1) Reported as other current assets in the condensed consolidated balance sheets (2) Reported as other non-current assets in the condensed consolidated balance sheets (3) Reported as accrued expenses in the condensed consolidated balance sheets Our Level 2 debt instruments are held by a custodian who prices some of the investments using standard inputs in various asset price models or obtains investment prices from third-party pricing providers that incorporate standard inputs in various asset price models. These pricing providers utilize the most recent observable market information in pricing these securities or, if specific prices are not available for these securities, use other observable inputs like market transactions involving identical or comparable securities. We review Level 2 inputs and fair value for reasonableness and the values may be further validated by comparison to multiple independent pricing sources. In addition, we review third-party pricing provider models, key inputs and assumptions and understand the pricing processes at our third-party providers in determining the overall reasonableness of the fair value of our Level 2 debt instruments. As of October 26, 2018 and April 27, 2018, we have not made any adjustments to the prices obtained from our third-party pricing providers. Fair Value of Debt As of October 26, 2018 and April 27, 2018, the fair value of our long-term debt was approximately $1,524 million and $1,523 million, respectively. The fair value of our long-term debt was based on observable market prices in a less active market. The fair value of our commercial paper notes approximated their carrying value. All of our debt obligations are categorized as Level 2 instruments.

Financing Arrangements

Financing Arrangements	6 Months Ended
	Oct. 26, 2018
Debt Disclosure [Abstract]
Financing Arrangements	8. Financing Arrangements Long-Term Debt The following table summarizes information relating to our long-term debt, which we collectively refer to as our Senior Notes (in millions, except interest rates): October 26, 2018 April 27, 2018 Effective Effective Amount Interest Rate Amount Interest Rate 2.00% Senior Notes Due September 2019 $ 400 2.32 % $ 400 2.32 % 3.375% Senior Notes Due June 2021 500 3.54 % 500 3.54 % 3.25% Senior Notes Due December 2022 250 3.43 % 250 3.43 % 3.30% Senior Notes Due September 2024 400 3.42 % 400 3.42 % Total principal amount 1,550 1,550 Unamortized discount and issuance costs (7 ) (9 ) Total senior notes 1,543 1,541 Less: Current portion of long-term debt (399 ) — Total long-term debt $ 1,144 $ 1,541 Senior Notes Our 2.00% Senior Notes and 3.30% Senior Notes, each with a principal amount of $400 million, were issued in September 2017. Interest on these Senior Notes is paid semi-annually in March and September. Our 3.375% Senior Notes and 3.25% Senior Notes, with principal amounts of $500 million and $250 million, respectively, were issued in June 2014 and December 2012, respectively. Interest on these Senior Notes is paid semi-annually in June and December. Our Senior Notes, which are unsecured, unsubordinated obligations, rank equally in right of payment with any existing and future senior unsecured indebtedness. As of October 26, 2018, our aggregate future principal debt maturities are as follows (in millions): Fiscal Year Amount 2020 $ 400 2022 500 2023 250 2025 400 Total $ 1,550 Commercial Paper Program and Credit Facility Amounts available under the Program, as amended in July 2017, may be borrowed, repaid and re-borrowed, with the aggregate face or principal amount of the notes outstanding under the Program at any time not to exceed $1.0 billion. The proceeds from the issuance of the notes are used for general corporate purposes. As of October 26, 2018, we had commercial paper notes outstanding with an aggregate principal amount of $250 million, a weighted-average interest rate of 2.45% and maturities ranging from 4 days to 31 days. In connection with the Program, we have a senior unsecured credit agreement with a syndicated group of lenders that expires on December 10, 2021. The credit agreement, as amended in July 2017, provides a $1.0 billion revolving unsecured credit facility, with a $50 million letter of credit sub-facility, that serves as a back-up for the Program. Proceeds from the facility may also be used for general corporate purposes to the extent that the credit facility exceeds the outstanding debt issued under the Program . The credit agreement includes options that allow us to request an increase in the facility of up to an additional $300 million and to extend its maturity date for two additional one-year periods, both subject to certain conditions. As of October 26, 2018 we were in compliance with all associated covenants in this agreement. No amounts were drawn against this facility during any of the periods presented.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Oct. 26, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stockholders' Equity	9. Stockholders’ Equity Equity Incentive Awards As of October 26, 2018, we have certain equity incentive awards (awards) outstanding, which include stock options, restricted stock units (RSUs), including time-based RSUs and performance-based RSUs (PBRSUs), and Employee Stock Purchase Plan (ESPP) awards. Stock Options The following table summarizes information related to our stock options (in millions, except exercise price and contractual term): Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding as of April 27, 2018 1 $ 31.19 Outstanding as of October 26, 2018 1 $ 30.49 3.27 $ 29 Exercisable as of October 26, 2018 1 $ 32.21 2.92 $ 25 The aggregate intrinsic value represents the pre-tax difference between the exercise price of stock options and the quoted market price of our stock on that day for all in-the-money options. Additional information related to our stock options is summarized below (in millions): Six Months Ended October 26, 2018 October 27, 2017 Intrinsic value of exercises $ 22 $ 11 Proceeds received from exercises $ 17 $ 15 Fair value of options vested $ 1 $ 5 Restricted Stock Units In the six months ended October 26, 2018, The following table summarizes information related to our RSUs, including PBRSUs, (in millions, except fair value): Number of Shares Weighted- Average Grant Date Fair Value Outstanding as of April 27, 2018 9 $ 32.91 Granted 3 $ 63.37 Vested (3 ) $ 31.67 Forfeited (1 ) $ 34.03 Outstanding as of October 26, 2018 8 $ 44.55 We primarily use the net share settlement approach upon vesting, where a portion of the shares are withheld as settlement of employee withholding taxes, which decreases the shares issued to the employee by a corresponding value. The number and value of the shares netted for employee taxes are summarized in the table below (in millions): Six Months Ended October 26, 2018 October 27, 2017 Shares withheld for taxes 1 2 Fair value of shares withheld $ 89 $ 60 Employee Stock Purchase Plan The following table summarizes activity related to the purchase rights issued under the ESPP (in millions): Six Months Ended October 26, 2018 October 27, 2017 Shares issued under the ESPP 2 2 Proceeds from issuance of shares $ 49 $ 42 Stock-Based Compensation Expense Stock-based compensation expense is included in the condensed consolidated statements of operations as follows (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Cost of product revenues $ — $ 1 $ 1 $ 2 Cost of hardware maintenance and other services revenues 2 2 5 5 Sales and marketing 16 16 33 37 Research and development 12 12 24 27 General and administrative 8 8 15 16 Total stock-based compensation expense $ 38 $ 39 $ 78 $ 87 Income tax benefit for stock-based compensation expense $ 5 $ 9 $ 10 $ 18 As of October 26, 2018, total unrecognized compensation expense related to our equity awards was $337 million, which is expected to be recognized on a straight-line basis over a weighted-average remaining service period of 2.3 years. Stock Repurchase Program Our Board of Directors has authorized the repurchase of up to $13.6 billion of our common stock. Under this program, which we may suspend or discontinue at any time, we may purchase shares of our outstanding common stock through solicited or unsolicited transactions in the open market, in privately negotiated transactions, through accelerated share repurchase programs, pursuant to a Rule 10b5-1 plan or in such other manner as deemed appropriate by our management. The following table summarizes activity related to this program for the six months ended October 26, 2018 (in millions, except per share amounts): Number of shares repurchased 14 Average price per share $ 77.94 Aggregate purchase price $ 1,061 Remaining authorization at end of period $ 2,939 The aggregate purchase price of our stock repurchases for the six months ended October 26, 2018 consisted of $1,061 million of open market purchases, of which $597 million and $464 million were allocated to additional paid-in capital and retained earnings (accumulated deficit), respectively. Since the May 13, 2003 inception of our stock repurchase program through October 26, 2018, we repurchased a total of 298 million shares of our common stock at an average price of $35.87 per share, for an aggregate purchase price of $10.7 billion. Dividends The following is a summary of our activities related to dividends on our common stock (in millions, except per share amounts): Six Months Ended October 26, 2018 October 27, 2017 Dividends per share declared $ 0.80 $ 0.40 Dividend payments allocated to additional paid-in capital $ 207 $ — Dividend payments allocated to retained earnings (accumulated deficit) $ — $ 108 On November 14, 2018, we declared a cash dividend of $0.40 per share of common stock, payable on January 23, 2019 to holders of record as of the close of business on January 4, 2019. The timing and amount of future dividends will depend on market conditions, corporate business and financial considerations and regulatory requirements. All dividends declared have been determined by us to be legally authorized under the laws of the state in which we are incorporated. Retained Earnings (Accumulated Deficit) A reconciliation of retained earnings (accumulated deficit) is as follows (in millions): Balance as of April 27, 2018 $ (9 ) Cumulative-effect of new accounting principle (51 ) Net income 524 Repurchases of common stock (464 ) Balance as of October 26, 2018 $ — In the first quarter of fiscal 2019, we adopted an ASU that eliminates the deferred tax effects of intra-entity asset transfers other than inventory and recorded the cumulative-effect of adoption to retained earnings (accumulated deficit). Refer to Note 1 – Description of Business and Significant Accounting Policies for details. Accumulated Other Comprehensive Income (Loss) Changes in accumulated other comprehensive income (loss) (AOCI) by component, net of tax, are summarized below (in millions): Foreign Currency Translation Adjustments Defined Benefit Obligation Adjustments Unrealized Gains (Losses) on Available- for-Sale Securities Total Balance as of April 27, 2018 $ (27 ) $ — $ (43 ) $ (70 ) Other comprehensive income (loss), net of tax (3 ) — (1 ) (4 ) Amounts reclassified from AOCI, net of tax — (1 ) — (1 ) Total other comprehensive loss (3 ) (1 ) (1 ) (5 ) Balance as of October 26, 2018 $ (30 ) $ (1 ) $ (44 ) $ (75 )

Derivatives and Hedging Activit

Derivatives and Hedging Activities	6 Months Ended
	Oct. 26, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	10. Derivatives and Hedging Activities We use derivative instruments to manage exposures to foreign currency risk. Our primary objective in holding derivatives is to reduce the volatility of earnings and cash flows associated with changes in foreign currency exchange rates. The maximum length of time over which forecasted foreign currency denominated revenues are hedged is six months. The program is not designated for trading or speculative purposes. Our derivatives expose us to credit risk to the extent that the counterparties may be unable to meet the terms of our agreements with them. We seek to mitigate such risk by limiting our counterparties to major financial institutions. In addition, the potential risk of loss with any one counterparty resulting from this type of credit risk is monitored on an ongoing basis. We also have in place master netting arrangements to mitigate the credit risk of our counterparties and to potentially reduce our losses due to counterparty nonperformance. We present our derivative instruments as net amounts in our condensed consolidated balance sheets. The gross and net fair value amounts of such instruments were not material as of October 26, 2018 or April 27, 2018. We did not recognize any gains or losses in earnings due to hedge ineffectiveness for any period presented. All contracts have a maturity of less than six months. The notional amount of our outstanding U.S. dollar equivalent foreign currency exchange forward contracts consisted of the following (in millions): October 26, 2018 April 27, 2018 Cash Flow Hedges Forward contracts purchased $ 182 $ — Balance Sheet Contracts Forward contracts sold $ 101 $ 115 Forward contracts purchased $ 237 $ 412 The effect of derivative instruments not designated as hedging instruments recognized in other income, net on our condensed consolidated statements of operations was as follows (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Gain (Loss) Recognized into Income Gain (Loss) Recognized into Income Foreign currency exchange contracts $ 2 $ 1 $ 12 $ (1 )

Restructuring Charges

Restructuring Charges	6 Months Ended
	Oct. 26, 2018
Restructuring And Related Activities [Abstract]
Restructuring Charges	11. Restructuring Charges ` In the first quarter of fiscal 2019, we announced a restructuring plan (the May 2018 Plan) to reduce costs and redirect resources to our highest return activities, which included a reduction in our global workforce of less than 2%. Charges related to the plan consisted primarily of employee severance-related costs. Substantially all activities under the plan have been completed. Management previously approved the November 2016 Plan, under which we reduced our global workforce by approximately 6%. We completed all workforce related activities under this plan as of the end of fiscal 2017. The remaining balance as of October 26, 2018 principally relates to lease obligations that will be paid over their remaining terms. Activities related to our restructuring plans are summarized as follows (in millions): Six Months Ended Six Months Ended October 26, 2018 October 27, 2017 May 2018 Plan November 2016 Plan Total November 2016 Plan Balance at beginning of period $ — $ 6 $ 6 $ 13 Net charges 19 — 19 — Cash payments (17 ) (1 ) (18 ) (5 ) Balance at end of period $ 2 $ 5 $ 7 $ 8

Income Taxes

Income Taxes	6 Months Ended
	Oct. 26, 2018
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes Our effective tax rates for the periods presented were as follows: Six Months Ended October 26, 2018 October 27, 2017 Effective tax rates 7.3 % 16.9 % Our effective tax rates reflect the impact of a significant amount of our earnings, primarily income from our European operations which are headquartered in the Netherlands, being taxed in foreign jurisdictions at rates below the United States (U.S.) statutory tax rate. The differences in effective tax rates for the six months ended October 26, 2018 and October 27, 2017 were primarily related to the adoption of the new revenue standard, differences in discrete benefits for stock-based compensation and the reduced federal income tax rate due to U.S. tax reform. The effective tax rate for the six months ended October 27, 2017 has been restated to reflect the retrospective application of the new revenue standard. During the six months ended October 26, 2018, we recognized a $34 million discrete tax benefit for adjustments to certain intercompany transactions resulting from the retrospective application of the new standard. See Note 5 – Revenue for additional details. On December 22, 2017, the Tax Cuts and Jobs Act (“TCJA”) was enacted into law. The TCJA made significant changes to the U.S. corporate income tax system including a reduction of the U.S. federal corporate income tax rate from 35% to 21%, the imposition of a one-time transition tax on deferred foreign earnings, and the creation of new taxes on certain foreign-sourced earnings. As of October 26, 2018, we have not fully completed the accounting for the tax impacts of the TCJA. No significant adjustments to prior period estimates or positions have been made in the current period. The provisional amounts recorded are based on reasonable estimates and our current interpretation and understanding of the TCJA. The final impacts of U.S. tax reform may differ, possibly materially, due to factors such as the issuance of further regulatory guidance, changes in interpretations, and the collection and analysis of additional information. The Company is also still evaluating the effects of the TCJA’s global minimum tax on intangible low-taxed income (“GILTI”) and has not yet made an accounting policy election to either account for the tax under a period cost method or a deferred method. For the six months ended October 26, 2018, we have accounted for the GILTI tax under a period cost method as we continue to evaluate potential impacts. In accordance with Staff Accounting Bulletin 118, we will complete the accounting of the tax effects of the TCJA within the measurement period not to extend beyond one year from the enactment date. As of October 26, 2018, we had $356 million of gross unrecognized tax benefits. Inclusive of penalties, interest and certain income tax benefits, $306 million would affect our provision for income taxes if recognized, and $324 million has been recorded in other long-term liabilities. We are currently undergoing federal income tax audits in the U.S. and several foreign tax jurisdictions. Transfer pricing calculations are key issues under audits in various jurisdictions, and are often subject to dispute and appeals. The IRS has concluded the examination of our tax returns for our fiscal years through 2010. The IRS commenced the examination of our federal income tax returns for our fiscal years 2012 and 2013 in August 2016. We expect this examination to conclude within the next 12 months. In September 2010, the Danish Tax Authorities issued a decision concluding that distributions declared in 2005 and 2006 by our Danish subsidiary were subject to Danish at-source dividend withholding tax. We do not believe that our Danish subsidiary is liable for such withholding tax and filed an appeal with the Danish Tax Tribunal. In December 2011, the Danish Tax Tribunal issued a ruling in favor of NetApp. The Danish tax examination agency appealed this decision at the Danish High Court (DHC) in March 2012. In February 2016, the DHC requested a preliminary ruling from the Court of Justice of the European Union (CJEU). Parties were heard before the court in October 2017. During March 2018, the Advocate General issued an opinion which was largely in favor of NetApp, however, the CJEU is not bound by the opinion of the Advocate General. It is expected that the preliminary ruling will be issued during our fiscal year 2019. Once a ruling has been issued by the CJEU, it will be reviewed and may be subjected to additional briefing by the DHC. Once complete, the DHC will issue its final decision. We expect this decision to be issued during our fiscal year 2019 or 2020. We continue to monitor the progress of ongoing discussions with tax authorities and the impact, if any, of the expected expiration of the statute of limitations in various taxing jurisdictions. We believe that within the next 12 months, it is reasonably possible that either certain audits will conclude, certain statutes of limitations will lapse, or both. As a result of uncertainties regarding tax audits and their possible outcomes, an estimate of the range of possible impacts to unrecognized tax benefits in the next twelve months cannot be made at this time.

Net Income per Share

Net Income per Share	6 Months Ended
	Oct. 26, 2018
Earnings Per Share [Abstract]
Net Income per Share	13. Net Income per Share The following is a calculation of basic and diluted net income per share (in millions, except per share amounts): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Numerator: Net income $ 241 $ 174 $ 524 $ 305 Denominator: Shares used in basic computation 258 269 260 270 Dilutive impact of employee equity award plans 6 6 7 7 Shares used in diluted computation 264 275 267 277 Net Income per Share: Basic $ 0.93 $ 0.65 $ 2.02 $ 1.13 Diluted $ 0.91 $ 0.63 $ 1.96 $ 1.10 No potential shares from outstanding employee equity awards were excluded from the diluted net income per share calculation for the three or six months ended October 26, 2018. For the three and six months ended October 27, 2017, 1 million and 2 million potential shares from outstanding awards, respectively, were excluded from the calculation as their inclusion would have been anti-dilutive.

Segment, Geographic, and Signif

Segment, Geographic, and Significant Customer Information	6 Months Ended
	Oct. 26, 2018
Segment Reporting [Abstract]
Segment, Geographic, and Significant Customer Information	14. Segment, Geographic, and Significant Customer Information We operate in one industry segment: the design, manufacturing, marketing, and technical support of high-performance storage and data management solutions. We conduct business globally, and our sales and support activities are managed on a geographic basis. Our management reviews financial information presented on a consolidated basis, accompanied by disaggregated information it receives from our internal management system about revenues by geographic region, based on the location from which the customer relationship is managed, for purposes of allocating resources and evaluating financial performance. We do not allocate costs of revenues, research and development, sales and marketing, or general and administrative expenses to our geographic regions in this internal management reporting because management does not review operations or operating results, or make planning decisions, below the consolidated entity level. Summarized revenues by geographic region based on information from our internal management system and utilized by our Chief Executive Officer, who is considered our Chief Operating Decision Maker, is as follows (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 United States, Canada and Latin America (Americas) $ 868 $ 792 $ 1,711 $ 1,513 Europe, Middle East and Africa (EMEA) 429 426 859 827 Asia Pacific (APAC) 220 197 421 396 Net revenues $ 1,517 $ 1,415 $ 2,991 $ 2,736 Americas revenues consist of sales to Americas commercial and U.S. public sector markets. Sales to customers inside the U.S. were $789 million and $722 million during the three months ended October 26, 2018 and October 27, 2017, respectively, and were $1,550 million and 1,361 million during the six months ended October 26, 2018 and October 27, 2017, respectively. The majority of our assets, excluding cash, cash equivalents, short-term investments and accounts receivable, were attributable to our domestic operations. The following table presents cash, cash equivalents and short-term investments held in the U.S. and internationally in various foreign subsidiaries (in millions): October 26, 2018 April 27, 2018 U.S. $ 405 $ 853 International 3,894 4,538 Total $ 4,299 $ 5,391 With the exception of property and equipment, we do not identify or allocate our long-lived assets by geographic area. The following table presents property and equipment information for geographic areas based on the physical location of the assets (in millions): October 26, 2018 April 27, 2018 U.S. $ 580 $ 566 International 190 190 Total $ 770 $ 756 The following customers, each of which is a distributor, accounted for 10% or more of our net revenues: Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Arrow Electronics, Inc. 24 % 22 % 23 % 23 % Tech Data Corporation 21 % 19 % 19 % 20 % The following customers accounted for 10% or more of accounts receivable: October 26, 2018 April 27, 2018 Arrow Electronics, Inc. 11 % 17 % Tech Data Corporation 24 % 17 %

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Oct. 26, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	15. Commitments and Contingencies Operating Leases We lease various equipment, vehicles and office space in the U.S. and internationally. Future annual minimum lease payments under non-cancelable operating leases with an initial term in excess of one year totaled $172 million as of October 26, 2018. Purchase Orders and Other Commitments In the ordinary course of business, we make commitments to third-party contract manufacturers to manage manufacturer lead times and meet product forecasts, and to other parties to purchase various key components used in the manufacturing of our products. A significant portion of our reported purchase commitments arising from these agreements consists of firm, non-cancelable, and unconditional commitments. As of October 26, 2018, we had $422 million in non-cancelable purchase commitments for inventory. We record a liability for firm, non-cancelable and unconditional purchase commitments for quantities in excess of our future demand forecasts consistent with the valuation of our excess and obsolete inventory. As of October 26, 2018 and April 27, 2018, such liability amounted to $16 million and $14 million, respectively, and is included in accrued expenses in our condensed consolidated balance sheets. To the extent that such forecasts are not achieved, our commitments and associated accruals may change. In addition to inventory commitments with contract manufacturers and component suppliers, we have open purchase orders and contractual obligations associated with our ordinary course of business for which we have not yet received goods or services. As of October 26, 2018, we had $5 million in construction related obligations and $187 million in other purchase obligations. Financing Guarantees While most of our arrangements for sales include short-term payment terms, from time to time we provide long-term financing to creditworthy customers. We have generally sold receivables financed through these arrangements on a non-recourse basis to third party financing institutions within 10 days of the contracts’ dates of execution, and we classify the proceeds from these sales as cash flows from operating activities in our condensed consolidated statements of cash flows. We account for the sales of these receivables as “true sales” as defined in the accounting standards on transfers of financial assets, as we are considered to have surrendered control of these financing receivables. Provided all other revenue recognition criteria have been met, we recognize product revenues for these arrangements, net of any payment discounts from financing transactions, upon product acceptance. We sold $43 million and $49 million of receivables during the six months ended October 26, 2018 and October 27, 2017, respectively. In addition, we enter into arrangements with leasing companies for the sale of our hardware systems products. These leasing companies, in turn, lease our products to end-users. The leasing companies generally have no recourse to us in the event of default by the end-user and we recognize revenue upon delivery to the end-user customer, if all other revenue recognition criteria have been met. Some of the leasing arrangements described above have been financed on a recourse basis through third-party financing institutions. Under the terms of recourse leases, which are generally three years or less, we remain liable for the aggregate unpaid remaining lease payments to the third-party leasing companies in the event of end-user customer default. These arrangements are generally collateralized by a security interest in the underlying assets. Where we provide a guarantee for recourse leases, we recognize revenues in accordance with our revenue recognition policy, as updated to reflect the adoption of ASC 606. In connection with certain recourse financing arrangements, we receive advance payments associated with undelivered elements that are subject to customer refund rights. We defer revenue associated with these advance payments until the related refund rights expire and we perform the services. As of October 26, 2018 and April 27, 2018, the aggregate amount by which such contingencies exceeded the associated liabilities was not significant. To date, we have not experienced significant losses under our lease financing programs or other financing arrangements . We have entered into service contracts with certain of our end-user customers that are supported by third-party financing arrangements. If a service contract is terminated as a result of our non-performance under the contract or our failure to comply with the terms of the financing arrangement, we could, under certain circumstances, be required to acquire certain assets related to the service contract or to pay the aggregate unpaid financing payments under such arrangements. As of October 26, 2018, we have not been required to make any payments under these arrangements, and we believe the likelihood of having to acquire a material amount of assets or make payments under these arrangements is remote. The portion of the financial arrangement that represents unearned services revenue is included in deferred revenue and financed unearned services revenue in our condensed consolidated balance sheets . Legal Contingencies When a loss is considered probable and reasonably estimable, we record a liability in the amount of our best estimate for the ultimate loss. However, the likelihood of a loss with respect to a particular contingency is often difficult to predict and determining a meaningful estimate of the loss or a range of loss may not be practicable based on the information available and the potential effect of future events and decisions by third parties that will determine the ultimate resolution of the contingency. We are subject to various legal proceedings and claims that arise in the normal course of business. We may, from time to time, receive claims that we are infringing third parties’ intellectual property rights, including claims for alleged patent infringement brought by non-practicing entities. We are currently involved in patent litigations brought by non-practicing entities and other third parties. We believe we have strong arguments that our products do not infringe and/or the asserted patents are invalid, and we intend to vigorously defend against the plaintiffs’ claims. However, there is no guarantee that we will prevail at trial and if a jury were to find that our products infringe, we could be required to pay significant monetary damages, and may cause product shipment delays, require us to redesign our products, or require us to enter into royalty or licensing agreements. Although management at present believes that the ultimate outcome of these proceedings, individually and in the aggregate, will not materially harm our financial position, results of operations, cash flows, or overall trends, legal proceedings are subject to inherent uncertainties, and unfavorable rulings or other events could occur. Unfavorable resolutions could include significant monetary damages. In addition, in matters for which injunctive relief or other conduct remedies are sought, unfavorable resolutions could include an injunction or other order prohibiting us from selling one or more products at all or in particular ways or requiring other remedies. An unfavorable outcome may result in a material adverse impact on our business, results of operations, financial position, and overall trends. No material accrual has been recorded as of October 26, 2018 related to such matters.

Description of Business and S_2

Description of Business and Significant Accounting Policies (Policies)	6 Months Ended
	Oct. 26, 2018
Accounting Policies [Abstract]
Basis of Presentation and Preparation	Basis of Presentation and Preparation Our fiscal year is reported on a 52- or 53-week year ending on the last Friday in April. An additional week is included in the first fiscal quarter approximately every six years to realign fiscal months with calendar months. Fiscal years 2019 and 2018, ending on April 26, 2019, and April 27, 2018, respectively, are each 52-week years, with 13 weeks in each of their quarters. The accompanying unaudited condensed consolidated financial statements have been prepared by the Company, and reflect all adjustments, consisting only of normal recurring adjustments, that are, in the opinion of management, necessary for the fair presentation of our financial position, results of operations, comprehensive income and cash flows for the interim periods presented. The statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information. Accordingly, these statements do not include all information and footnotes required by GAAP for annual consolidated financial statements, and should be read in conjunction with our audited consolidated financial statements as of and for the fiscal year ended April 27, 2018 contained in our Annual Report on Form 10-K. The results of operations for the three and six months ended October 26, 2018 are not necessarily indicative of the operating results to be expected for the full fiscal year or future operating periods. The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Such estimates include, but are not limited to, revenue recognition, reserves and allowances; inventory valuation and purchase order accruals; valuation of goodwill and intangibles; restructuring reserves; product warranties; employee compensation and benefit accruals; stock-based compensation; loss contingencies; valuation of investment securities; income taxes and fair value measurements. Actual results could differ materially from those estimates. Accounting Changes In May 2014, the Financial Accounting Standards Board (FASB) issued a new standard, Revenue from Contracts with Customers (ASC 606) In October 2016, the FASB issued an accounting standards update (ASU) which eliminates the deferred tax effects of intra-entity asset transfers other than inventory. As a result, tax expense from the sale of an asset in the seller’s tax jurisdiction is recognized when the transfer occurs, even though the pre-tax effects of that transaction are eliminated in consolidation. In the first quarter of fiscal 2019, we adopted this ASU using a modified retrospective transition approach and recorded a cumulative-effect adjustment to decrease retained earnings by $51 million, with a corresponding reduction of prepaid taxes, which were classified as other non-current assets on our condensed consolidated balance sheets. In November 2016, the FASB issued an ASU that requires a statement of cash flows to explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. In the first quarter of fiscal 2019, we adopted this ASU using a retrospective transition method. Accordingly, our condensed consolidated statement of cash flows for the three and six months ended October 27, 2017, as presented herein, has been restated to comply with the new requirements. Refer to Note 4 – Supplemental Financial Information for a detail of the components of our cash, cash equivalents and restricted cash balances. There have been no other significant changes in our significant accounting policies as of and for the six months ended October 26, 2018, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the fiscal year ended April 27, 2018.
Accounting Standards on Transfers of Financial Assets	We account for the sales of these receivables as “true sales” as defined in the accounting standards on transfers of financial assets, as we are considered to have surrendered control of these financing receivables. Provided all other revenue recognition criteria have been met, we recognize product revenues for these arrangements, net of any payment discounts from financing transactions, upon product acceptance. We sold $43 million and $49 million of receivables during the six months ended October 26, 2018 and October 27, 2017, respectively.
Revenue Recognition	Where we provide a guarantee for recourse leases, we recognize revenues in accordance with our revenue recognition policy, as updated to reflect the adoption of ASC 606. In connection with certain recourse financing arrangements, we receive advance payments associated with undelivered elements that are subject to customer refund rights.
Debt	The portion of the financial arrangement that represents unearned services revenue is included in deferred revenue and financed unearned services revenue in our condensed consolidated balance sheets .

Goodwill and Purchased Intang_2

Goodwill and Purchased Intangible Assets, Net (Tables)	6 Months Ended
	Oct. 26, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill Activity	Goodwill activity is summarized as follows (in millions): Balance as of April 27, 2018 $ 1,739 Additions 3 Balance as of October 26, 2018 $ 1,742
Purchased Intangible Assets, Net	Purchased intangible assets, net are summarized below (in millions): October 26, 2018 April 27, 2018 Gross Accumulated Net Gross Accumulated Net Assets Amortization Assets Assets Amortization Assets Developed technology $ 160 $ (95 ) $ 65 $ 164 $ (80 ) $ 84 Customer contracts/relationships 41 (37 ) 4 43 (33 ) 10 Other purchased intangibles — — — 9 (9 ) — Total purchased intangible assets $ 201 $ (132 ) $ 69 $ 216 $ (122 ) $ 94
Amortization Expense for Purchased Intangible Assets	Amortization expense for purchased intangible assets is summarized below (in millions): Three Months Ended Six Months Ended Statements of October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Operations Classification Developed technology $ 9 $ 9 $ 18 $ 17 Cost of revenues Customer contracts/relationships 3 4 7 8 Operating expenses Other purchased intangibles — 1 — 2 Operating expenses Total $ 12 $ 14 $ 25 $ 27
Future Amortization Expense Related to Purchased Intangible Assets	As of October 26, 2018, future amortization expense related to purchased intangible assets is as follows (in millions): Fiscal Year Amount Remainder of 2019 $ 22 2020 31 2021 16 Total $ 69

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	6 Months Ended
	Oct. 26, 2018
Supplemental Financial Information [Abstract]
Cash, Cash Equivalents and Restricted Cash	Cash, cash equivalents and restricted cash (in millions): The following table presents cash and cash equivalents as reported in our condensed consolidated balance sheets, as well as the sum of cash, cash equivalents and restricted cash as reported on our condensed consolidated statement of cash flows in accordance with our adoption of the ASU discussed in Note 1 – Description of Business and Significant Accounting Policies: October 26, 2018 April 27, 2018 Cash $ 2,251 $ 2,727 Cash equivalents 108 214 Cash and cash equivalents $ 2,359 $ 2,941 Short-term restricted cash 5 5 Long-term restricted cash 1 1 Restricted cash $ 6 $ 6 Cash, cash equivalents and restricted cash $ 2,365 $ 2,947
Inventories	Inventories (in millions): October 26, 2018 April 27, 2018 Purchased components $ 12 $ 12 Finished goods 74 110 Inventories $ 86 $ 122
Property and Equipment, Net	Property and equipment, net (in millions): October 26, 2018 April 27, 2018 Land $ 106 $ 106 Buildings and improvements 604 594 Leasehold improvements 87 88 Computer, production, engineering and other equipment 786 733 Computer software 357 357 Furniture and fixtures 104 99 Construction-in-progress 8 27 2,052 2,004 Accumulated depreciation and amortization (1,282 ) (1,248 ) Property and equipment, net $ 770 $ 756
Other Non-Current Assets	Other non-current assets (in millions): October 26, 2018 April 27, 2018 Deferred tax assets $ 223 $ 229 Other assets 276 221 Other non-current assets $ 499 $ 450
Accrued Expenses	Accrued expenses (in millions): October 26, 2018 April 27, 2018 Accrued compensation and benefits $ 314 $ 441 Product warranty liabilities 26 25 Other current liabilities 312 359 Accrued expenses $ 652 $ 825
Product Warranty Liabilities	The following tables summarize the activity related to product warranty liabilities and their balances as reported in our condensed consolidated balance sheets (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Balance at beginning of period $ 38 $ 44 $ 40 $ 50 Expense accrued during the period 6 7 10 8 Warranty costs incurred (5 ) (7 ) (11 ) (14 ) Balance at end of period $ 39 $ 44 $ 39 $ 44 October 26, 2018 April 27, 2018 Accrued expenses $ 26 $ 25 Other long-term liabilities 13 15 Total warranty liabilities $ 39 $ 40
Other Long-term Liabilities	Other long-term liabilities (in millions): October 26, 2018 April 27, 2018 Liability for uncertain tax positions $ 324 $ 314 Income taxes payable 476 549 Product warranty liabilities 13 15 Other liabilities 86 114 Other long-term liabilities $ 899 $ 992
Statements of Cash Flows Additional Information	Non-cash investing and financing activities and supplemental cash flow information are as follows: Six Months Ended October 26, 2018 October 27, 2017 Non-cash Investing and Financing Activities: Capital expenditures incurred but not paid $ 7 $ 17 Supplemental Cash Flow Information: Income taxes paid, net of refunds $ 104 $ 28 Interest paid $ 26 $ 24

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Oct. 26, 2018
Disaggregation Of Revenue [Line Items]
Summary of Disaggregation of Revenue	The following table depicts the disaggregation of revenue by our products and services (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Product revenues $ 913 $ 819 $ 1,788 $ 1,546 Strategic 649 566 1,261 1,064 Mature 264 253 527 482 Software maintenance revenues 236 224 465 447 Hardware maintenance and other services revenues 368 372 738 743 Hardware maintenance support contracts 303 306 606 604 Professional and other services 65 66 132 139 Net revenues $ 1,517 $ 1,415 $ 2,991 $ 2,736
Deferred Revenue and Financed Unearned Services Revenue	The following table summarizes the components of our deferred revenue and financed unearned services balance as reported in our condensed consolidated balance sheets (in millions): October 26, 2018 April 27, 2018 Deferred product revenue $ 102 $ 107 Deferred services revenue 3,010 3,134 Financed unearned services revenue 94 122 Total $ 3,206 $ 3,363 Reported as: Short-term $ 1,538 $ 1,712 Long-term 1,668 1,651 Total $ 3,206 $ 3,363 The following tables summarize the activity related to deferred revenue and financed unearned services revenue (in millions): Six Months Ended October 26, 2018 October 27, 2017 Balance at beginning of period $ 3,363 $ 3,213 Additions 1,067 1,031 Revenue recognized during the period (1,224 ) (1,185 ) Balance at end of period $ 3,206 $ 3,059
Summary of Activity Related to Deferred Commissions and their Balances in Condensed Consolidated Balance Sheets	The following tables summarize the activity related to deferred commissions and their balances as reported in our condensed consolidated balance sheets (in millions): Six Months Ended October 26, 2018 October 27, 2017 Balance at beginning of period $ 137 $ 113 Additions 35 34 Expense recognized during the period (41 ) (32 ) Balance at end of period $ 131 $ 115 October 26, 2018 April 27, 2018 Other current assets $ 61 $ 66 Other non-current assets 70 71 Total deferred commissions $ 131 $ 137
ASC 606
Disaggregation Of Revenue [Line Items]
Schedule of Impacts of Adoption of ASC 606 on Condensed Consolidated Balance Sheet and Statement of Operations	The following table presents the impacts of adoption of ASC 606 to select line items of our condensed consolidated balance sheet as of the end of fiscal 2018: As of April 27, 2018 As Previously Reported Impact of ASC 606 Adoption As Adjusted ASSETS Accounts receivable $ 1,009 $ 38 (1 ) $ 1,047 Inventories $ 126 $ (4 ) $ 122 Other current assets $ 330 $ 62 (2 ) $ 392 Other non-current assets $ 420 $ 30 (2 ) $ 450 LIABILITIES AND STOCKHOLDERS' EQUITY Short-term deferred revenue and financed unearned services revenue $ 1,804 $ (92 ) (3 ) $ 1,712 Other long-term liabilities $ 961 $ 31 (4 ) $ 992 Long-term deferred revenue and financed unearned services revenue $ 1,673 $ (22 ) (3 ) $ 1,651 Accumulated deficit $ (218 ) $ 209 (5 ) $ (9 ) (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) The following table presents the impacts of adoption of ASC 606 to our statement of operations for the second quarter and first six months of fiscal 2018: Three Months Ended Six Months Ended October 27, 2017 October 27, 2017 As Previously Reported Impact of ASC 606 Adoption As Adjusted As Previously Reported Impact of ASC 606 Adoption As Adjusted Revenues: Product $ 807 $ 12 $ 819 $ 1,530 $ 16 $ 1,546 Software maintenance 240 (16 ) 224 474 (27 ) 447 Hardware maintenance and other services 375 (3 ) 372 743 — 743 Net revenues 1,422 (7 ) 1,415 2,747 (11 ) 2,736 Cost of revenues: Cost of product 399 (2 ) 397 770 3 773 Cost of software maintenance 6 — 6 13 — 13 Cost of hardware maintenance and other services 115 (3 ) 112 228 (2 ) 226 Total cost of revenues 520 (5 ) 515 1,011 1 1,012 Gross profit 902 (2 ) 900 1,736 (12 ) 1,724 Operating expenses: Sales and marketing 420 1 421 845 (1 ) 844 Research and development 194 — 194 387 — 387 General and administrative 69 — 69 137 — 137 Total operating expenses 683 1 684 1,369 (1 ) 1,368 Income from operations 219 (3 ) 216 367 (11 ) 356 Other income, net 6 — 6 11 — 11 Income before income taxes 225 (3 ) 222 378 (11 ) 367 Provision for income taxes 50 (2 ) 48 67 (5 ) 62 Net income $ 175 $ (1 ) $ 174 $ 311 $ (6 ) $ 305 Net income per share: Basic $ 0.65 $ — $ 0.65 $ 1.15 $ (0.02 ) $ 1.13 Diluted $ 0.64 $ (0.01 ) $ 0.63 $ 1.12 $ (0.02 ) $ 1.10 Shares used in net income per share calculations: Basic 269 269 269 270 270 270 Diluted 275 275 275 277 277 277

Other Income, Net (Tables)

Other Income, Net (Tables)	6 Months Ended
	Oct. 26, 2018
Nonoperating Income Expense [Abstract]
Other Income, Net	Other income, net consists of the following (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Interest income $ 21 $ 19 $ 46 $ 35 Interest expense (14 ) (17 ) (28 ) (30 ) Other income, net — 4 7 6 Total other income, net $ 7 $ 6 $ 25 $ 11

Financial Instruments and Fai_2

Financial Instruments and Fair Value Measurements (Tables)	6 Months Ended
	Oct. 26, 2018
Investments Debt And Equity Securities [Abstract]
Summary of Investments	The following is a summary of our investments (in millions): October 26, 2018 April 27, 2018 Cost or Estimated Cost or Estimated Amortized Gross Unrealized Fair Amortized Gross Unrealized Fair Cost Gains Losses Value Cost Gains Losses Value Corporate bonds $ 1,614 $ — $ (40 ) $ 1,574 $ 1,865 $ 1 $ (39 ) $ 1,827 U.S. Treasury and government debt securities 362 — (4 ) 358 497 — (5 ) 492 Commercial paper — — — — 230 — — 230 Certificates of deposit 116 — — 116 115 — — 115 Mutual funds 34 — — 34 31 — — 31 Total debt and equity securities $ 2,126 $ — $ (44 ) $ 2,082 $ 2,738 $ 1 $ (44 ) $ 2,695
Contractual Maturities of Debt Investments	The following table presents the contractual maturities of our debt investments as of October 26, 2018 (in millions): Amortized Cost Fair Value Due in one year or less $ 679 $ 676 Due after one year through five years 835 821 Due after five years through ten years 578 551 $ 2,092 $ 2,048
Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis (in millions): October 26, 2018 Fair Value Measurements at Reporting Date Using Total Level 1 Level 2 Cash $ 2,251 $ 2,251 $ — Corporate bonds 1,574 — 1,574 U.S. Treasury and government debt securities 358 190 168 Certificates of deposit 116 — 116 Total cash, cash equivalents and short-term investments $ 4,299 $ 2,441 $ 1,858 Other items: Mutual funds (1) $ 6 $ 6 $ — Mutual funds (2) $ 28 $ 28 $ — Foreign currency exchange contracts assets (1) $ 5 $ — $ 5 Foreign currency exchange contracts liabilities (3) $ (3 ) $ — $ (3 ) (1) Reported as other current assets in the condensed consolidated balance sheets (2) Reported as other non-current assets in the condensed consolidated balance sheets (3) Reported as accrued expenses in the condensed consolidated balance sheets

Financing Arrangements (Tables)

Financing Arrangements (Tables)	6 Months Ended
	Oct. 26, 2018
Debt Disclosure [Abstract]
Carrying Value of Long-Term Debt	The following table summarizes information relating to our long-term debt, which we collectively refer to as our Senior Notes (in millions, except interest rates): October 26, 2018 April 27, 2018 Effective Effective Amount Interest Rate Amount Interest Rate 2.00% Senior Notes Due September 2019 $ 400 2.32 % $ 400 2.32 % 3.375% Senior Notes Due June 2021 500 3.54 % 500 3.54 % 3.25% Senior Notes Due December 2022 250 3.43 % 250 3.43 % 3.30% Senior Notes Due September 2024 400 3.42 % 400 3.42 % Total principal amount 1,550 1,550 Unamortized discount and issuance costs (7 ) (9 ) Total senior notes 1,543 1,541 Less: Current portion of long-term debt (399 ) — Total long-term debt $ 1,144 $ 1,541
Future Principal Debt Maturities	As of October 26, 2018, our aggregate future principal debt maturities are as follows (in millions): Fiscal Year Amount 2020 $ 400 2022 500 2023 250 2025 400 Total $ 1,550

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Oct. 26, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Activity Related to Stock Options	The following table summarizes information related to our stock options (in millions, except exercise price and contractual term): Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding as of April 27, 2018 1 $ 31.19 Outstanding as of October 26, 2018 1 $ 30.49 3.27 $ 29 Exercisable as of October 26, 2018 1 $ 32.21 2.92 $ 25
Additional Information Related to Stock Options	Additional information related to our stock options is summarized below (in millions): Six Months Ended October 26, 2018 October 27, 2017 Intrinsic value of exercises $ 22 $ 11 Proceeds received from exercises $ 17 $ 15 Fair value of options vested $ 1 $ 5
Activity Related to Restricted Stock Units Including Performance-Based Restricted Stock Units	The following table summarizes information related to our RSUs, including PBRSUs, (in millions, except fair value): Number of Shares Weighted- Average Grant Date Fair Value Outstanding as of April 27, 2018 9 $ 32.91 Granted 3 $ 63.37 Vested (3 ) $ 31.67 Forfeited (1 ) $ 34.03 Outstanding as of October 26, 2018 8 $ 44.55
Number and Value of Shares Netted for Employee Taxes	The number and value of the shares netted for employee taxes are summarized in the table below (in millions): Six Months Ended October 26, 2018 October 27, 2017 Shares withheld for taxes 1 2 Fair value of shares withheld $ 89 $ 60
Schedule of Employee Stock Purchase Plan (ESPP)	The following table summarizes activity related to the purchase rights issued under the ESPP (in millions): Six Months Ended October 26, 2018 October 27, 2017 Shares issued under the ESPP 2 2 Proceeds from issuance of shares $ 49 $ 42
Stock-Based Compensation Expense	Stock-based compensation expense is included in the condensed consolidated statements of operations as follows (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Cost of product revenues $ — $ 1 $ 1 $ 2 Cost of hardware maintenance and other services revenues 2 2 5 5 Sales and marketing 16 16 33 37 Research and development 12 12 24 27 General and administrative 8 8 15 16 Total stock-based compensation expense $ 38 $ 39 $ 78 $ 87 Income tax benefit for stock-based compensation expense $ 5 $ 9 $ 10 $ 18
Summary of Activities Related to Stock Repurchase Program	The following table summarizes activity related to this program for the six months ended October 26, 2018 (in millions, except per share amounts): Number of shares repurchased 14 Average price per share $ 77.94 Aggregate purchase price $ 1,061 Remaining authorization at end of period $ 2,939
Summary of Activities Related to Dividends on Common Stock	The following is a summary of our activities related to dividends on our common stock (in millions, except per share amounts): Six Months Ended October 26, 2018 October 27, 2017 Dividends per share declared $ 0.80 $ 0.40 Dividend payments allocated to additional paid-in capital $ 207 $ — Dividend payments allocated to retained earnings (accumulated deficit) $ — $ 108
Reconciliation of Retained Earnings (Accumulated Deficit)	A reconciliation of retained earnings (accumulated deficit) is as follows (in millions): Balance as of April 27, 2018 $ (9 ) Cumulative-effect of new accounting principle (51 ) Net income 524 Repurchases of common stock (464 ) Balance as of October 26, 2018 $ —
Accumulated Other Comprehensive Income (Loss) by Component Net of Tax	Changes in accumulated other comprehensive income (loss) (AOCI) by component, net of tax, are summarized below (in millions): Foreign Currency Translation Adjustments Defined Benefit Obligation Adjustments Unrealized Gains (Losses) on Available- for-Sale Securities Total Balance as of April 27, 2018 $ (27 ) $ — $ (43 ) $ (70 ) Other comprehensive income (loss), net of tax (3 ) — (1 ) (4 ) Amounts reclassified from AOCI, net of tax — (1 ) — (1 ) Total other comprehensive loss (3 ) (1 ) (1 ) (5 ) Balance as of October 26, 2018 $ (30 ) $ (1 ) $ (44 ) $ (75 )

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	6 Months Ended
	Oct. 26, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Notional Value of Outstanding Foreign Currency Exchange Forward Contracts	The notional amount of our outstanding U.S. dollar equivalent foreign currency exchange forward contracts consisted of the following (in millions): October 26, 2018 April 27, 2018 Cash Flow Hedges Forward contracts purchased $ 182 $ — Balance Sheet Contracts Forward contracts sold $ 101 $ 115 Forward contracts purchased $ 237 $ 412
Schedule of Derivative Instruments Not Designated as Hedging Instruments	The effect of derivative instruments not designated as hedging instruments recognized in other income, net on our condensed consolidated statements of operations was as follows (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Gain (Loss) Recognized into Income Gain (Loss) Recognized into Income Foreign currency exchange contracts $ 2 $ 1 $ 12 $ (1 )

Restructuring Charges (Tables)

Restructuring Charges (Tables)	6 Months Ended
	Oct. 26, 2018
Restructuring And Related Activities [Abstract]
Activities Related to Restructuring Reserves	Activities related to our restructuring plans are summarized as follows (in millions): Six Months Ended Six Months Ended October 26, 2018 October 27, 2017 May 2018 Plan November 2016 Plan Total November 2016 Plan Balance at beginning of period $ — $ 6 $ 6 $ 13 Net charges 19 — 19 — Cash payments (17 ) (1 ) (18 ) (5 ) Balance at end of period $ 2 $ 5 $ 7 $ 8

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Oct. 26, 2018
Income Tax Disclosure [Abstract]
Effective Tax Rates	Our effective tax rates for the periods presented were as follows: Six Months Ended October 26, 2018 October 27, 2017 Effective tax rates 7.3 % 16.9 %

Net Income per Share (Tables)

Net Income per Share (Tables)	6 Months Ended
	Oct. 26, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Income Per Share	The following is a calculation of basic and diluted net income per share (in millions, except per share amounts): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Numerator: Net income $ 241 $ 174 $ 524 $ 305 Denominator: Shares used in basic computation 258 269 260 270 Dilutive impact of employee equity award plans 6 6 7 7 Shares used in diluted computation 264 275 267 277 Net Income per Share: Basic $ 0.93 $ 0.65 $ 2.02 $ 1.13 Diluted $ 0.91 $ 0.63 $ 1.96 $ 1.10

Segment, Geographic, and Sign_2

Segment, Geographic, and Significant Customer Information (Tables)	6 Months Ended
	Oct. 26, 2018
Segment Reporting [Abstract]
Schedule of Revenues by Geographic Region	Summarized revenues by geographic region based on information from our internal management system and utilized by our Chief Executive Officer, who is considered our Chief Operating Decision Maker, is as follows (in millions): Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 United States, Canada and Latin America (Americas) $ 868 $ 792 $ 1,711 $ 1,513 Europe, Middle East and Africa (EMEA) 429 426 859 827 Asia Pacific (APAC) 220 197 421 396 Net revenues $ 1,517 $ 1,415 $ 2,991 $ 2,736
Schedule of Cash, Cash Equivalents and Short-Term Investments	The following table presents cash, cash equivalents and short-term investments held in the U.S. and internationally in various foreign subsidiaries (in millions): October 26, 2018 April 27, 2018 U.S. $ 405 $ 853 International 3,894 4,538 Total $ 4,299 $ 5,391
Schedule of Property and Equipment, Net by Geographic Areas	The following table presents property and equipment information for geographic areas based on the physical location of the assets (in millions): October 26, 2018 April 27, 2018 U.S. $ 580 $ 566 International 190 190 Total $ 770 $ 756
Schedule of Revenues from Significant Customers	The following customers, each of which is a distributor, accounted for 10% or more of our net revenues: Three Months Ended Six Months Ended October 26, 2018 October 27, 2017 October 26, 2018 October 27, 2017 Arrow Electronics, Inc. 24 % 22 % 23 % 23 % Tech Data Corporation 21 % 19 % 19 % 20 %
Schedule of Net Accounts Receivable from Significant Customers	The following customers accounted for 10% or more of accounts receivable: October 26, 2018 April 27, 2018 Arrow Electronics, Inc. 11 % 17 % Tech Data Corporation 24 % 17 %

Description of Business and S_3

Description of Business and Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended
	Jul. 27, 2018USD ($)
ASU 2016-16
Description Of Business And Significant Accounting Policies [Line Items]
Cumulative-effect adjustment to decrease retained earnings	$ (51)

Goodwill and Purchased Intang_3

Goodwill and Purchased Intangible Assets, Net - Schedule of Goodwill Activity (Detail) - USD ($) $ in Millions	Sep. 17, 2018	Oct. 26, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Balance as of April 27, 2018		$ 1,739
Additions	$ 3	3
Balance as of October 26, 2018		$ 1,742

Goodwill and Purchased Intang_4

Goodwill and Purchased Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Millions	Sep. 17, 2018	Oct. 26, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Acquired outstanding shares of privately-held software company in cash	$ 3	$ 3

Goodwill and Purchased Intang_5

Goodwill and Purchased Intangible Assets, Net - Purchased Intangible Assets, Net (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	$ 201	$ 216
Accumulated Amortization	(132)	(122)
Net Assets	69	94
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	160	164
Accumulated Amortization	(95)	(80)
Net Assets	65	84
Customer Contracts/Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	41	43
Accumulated Amortization	(37)	(33)
Net Assets	4	10
Other Purchased Intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	0	9
Accumulated Amortization	0	(9)
Net Assets	$ 0	$ 0

Goodwill and Purchased Intang_6

Goodwill and Purchased Intangible Assets, Net - Amortization Expense for Purchased Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Acquired Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 12	$ 14	$ 25	$ 27
Cost of revenues | Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Amortization expense	9	9	18	17
Operating expenses | Customer Contracts/Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Amortization expense	3	4	7	8
Operating expenses | Other Purchased Intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 0	$ 1	$ 0	$ 2

Goodwill and Purchased Intang_7

Goodwill and Purchased Intangible Assets, Net - Future Amortization Expense Related to Purchased Intangible Assets (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Acquired Finite Lived Intangible Assets [Line Items]
Net Assets	$ 69	$ 94
Intangible Assets Subject to Amortization
Acquired Finite Lived Intangible Assets [Line Items]
Remainder of 2019	22
2,020	31
2,021	16
Net Assets	$ 69

Supplemental Financial Inform_3

Supplemental Financial Information - Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018	Oct. 27, 2017	Apr. 28, 2017
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Cash	$ 2,251	$ 2,727
Cash equivalents	108	214
Cash and cash equivalents	2,359	2,941
Short-term restricted cash	5	5
Long-term restricted cash	1	1
Restricted cash	6	6
Cash, cash equivalents and restricted cash	$ 2,365	$ 2,947	$ 3,536	$ 2,450

Supplemental Financial Inform_4

Supplemental Financial Information - Inventories (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Inventory Disclosure [Abstract]
Purchased components	$ 12	$ 12
Finished goods	74	110
Inventories	$ 86	$ 122

Supplemental Financial Inform_5

Supplemental Financial Information - Property and Equipment Net (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 2,052	$ 2,004
Accumulated depreciation and amortization	(1,282)	(1,248)
Property and equipment, net	770	756
Land
Property Plant And Equipment [Line Items]
Property and equipment, gross	106	106
Buildings and improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	604	594
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	87	88
Computer, production, engineering and other equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	786	733
Computer software
Property Plant And Equipment [Line Items]
Property and equipment, gross	357	357
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	104	99
Construction-in-progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 8	$ 27

Supplemental Financial Inform_6

Supplemental Financial Information - Additional Information (Detail) - USD ($) $ in Millions	Oct. 25, 2019	Oct. 26, 2018	Apr. 27, 2018
Scenario, Forecast
Property Plant And Equipment [Line Items]
Sale of assets payments to be received	$ 96
Other Current Assets
Property Plant And Equipment [Line Items]
Land and buildings held for sale		$ 52	$ 52

Supplemental Financial Inform_7

Supplemental Financial Information - Other Non-Current Assets (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Deferred tax assets	$ 223	$ 229
Other assets	276	221
Other non-current assets	$ 499	$ 450

Supplemental Financial Inform_8

Supplemental Financial Information - Accrued expenses (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Payables And Accruals [Abstract]
Accrued compensation and benefits	$ 314	$ 441
Product warranty liabilities	26	25
Other current liabilities	312	359
Accrued expenses	$ 652	$ 825

Supplemental Financial Inform_9

Supplemental Financial Information - Product Warranty Liabilities (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Apr. 27, 2018
Movement In Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 38	$ 44	$ 40	$ 50
Expense accrued during the period	6	7	10	8
Warranty costs incurred	(5)	(7)	(11)	(14)
Balance at end of period	39	44	39	44
Standard Product Warranty Accrual, Balance Sheet Classification [Abstract]
Accrued expenses					$ 26	$ 25
Other long-term liabilities					13	15
Total warranty liabilities	$ 38	$ 44	$ 40	$ 50	$ 39	$ 40

Supplemental Financial Infor_10

Supplemental Financial Information - Other Long-term Liabilities (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Liabilities Other Than Long Term Debt Noncurrent [Abstract]
Liability for uncertain tax positions	$ 324	$ 314
Income taxes payable	476	549
Product warranty liabilities	13	15
Other liabilities	86	114
Other long-term liabilities	$ 899	$ 992

Supplemental Financial Infor_11

Supplemental Financial Information - Supplemental Cash Flows, Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Non-cash Investing and Financing Activities:
Capital expenditures incurred but not paid	$ 7	$ 17
Supplemental Cash Flow Information:
Income taxes paid, net of refunds	104	28
Interest paid	$ 26	$ 24

Revenue - Impacts of Adoption o

Revenue - Impacts of Adoption of ASC 606 to Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Millions		Oct. 26, 2018	Apr. 27, 2018
ASSETS
Accounts receivable		$ 765	$ 1,047
Inventories		86	122
Other current assets		321	392
Other non-current assets		499	450
LIABILITIES AND STOCKHOLDERS' EQUITY
Short-term deferred revenue and financed unearned services revenue		1,538	1,712
Other long-term liabilities		899	992
Long-term deferred revenue and financed unearned services revenue		1,668	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)

Revenue - Impacts of Adoption_2

Revenue - Impacts of Adoption of ASC 606 to Statement of Operations (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Revenues:
Net revenues	$ 1,517	$ 1,415	$ 2,991	$ 2,736
Cost of revenues:
Total cost of revenues	543	515	1,054	1,012
Gross profit	974	900	1,937	1,724
Operating expenses:
Sales and marketing	408	421	817	844
Research and development	211	194	419	387
General and administrative	69	69	142	137
Total operating expenses	688	684	1,397	1,368
Income from operations	286	216	540	356
Other income, net	7	6	25	11
Income before income taxes	293	222	565	367
Provision for income taxes	52	48	41	62
Net income	$ 241	$ 174	$ 524	$ 305
Net income per share:
Basic	$ 0.93	$ 0.65	$ 2.02	$ 1.13
Diluted	$ 0.91	$ 0.63	$ 1.96	$ 1.10
Shares used in net income per share calculations:
Basic	258	269	260	270
Diluted	264	275	267	277
Product [Member]
Revenues:
Net revenues	$ 913	$ 819	$ 1,788	$ 1,546
Cost of revenues:
Total cost of revenues	428	397	826	773
Software Maintenance [Member]
Revenues:
Net revenues	236	224	465	447
Cost of revenues:
Total cost of revenues	8	6	15	13
Hardware Maintenance and Other Services [Member]
Revenues:
Net revenues	368	372	738	743
Cost of revenues:
Total cost of revenues	$ 107	112	213	226
As Previously Reported | ASC 606
Revenues:
Net revenues		1,422		2,747
Cost of revenues:
Total cost of revenues		520		1,011
Gross profit		902		1,736
Operating expenses:
Sales and marketing		420		845
Research and development		194		387
General and administrative		69		137
Total operating expenses		683		1,369
Income from operations		219		367
Other income, net		6		11
Income before income taxes		225		378
Provision for income taxes		50		67
Net income		$ 175		$ 311
Net income per share:
Basic		$ 0.65		$ 1.15
Diluted		$ 0.64		$ 1.12
Shares used in net income per share calculations:
Basic		269		270
Diluted		275		277
As Previously Reported | Product [Member] | ASC 606
Revenues:
Net revenues		$ 807		$ 1,530
Cost of revenues:
Total cost of revenues		399		770
As Previously Reported | Software Maintenance [Member] | ASC 606
Revenues:
Net revenues		240		474
Cost of revenues:
Total cost of revenues		6		13
As Previously Reported | Hardware Maintenance and Other Services [Member] | ASC 606
Revenues:
Net revenues		375		743
Cost of revenues:
Total cost of revenues		115		228
Impact of ASC 606 Adoption | ASC 606
Revenues:
Net revenues		(7)		(11)
Cost of revenues:
Total cost of revenues		(5)		1
Gross profit		(2)		(12)
Operating expenses:
Sales and marketing		1		(1)
Research and development		0		0
General and administrative		0		0
Total operating expenses		1		(1)
Income from operations		(3)		(11)
Other income, net		0		0
Income before income taxes		(3)		(11)
Provision for income taxes		(2)	$ (34)	(5)
Net income		$ (1)		$ (6)
Net income per share:
Basic		$ 0		$ (0.02)
Diluted		$ (0.01)		$ (0.02)
Shares used in net income per share calculations:
Basic		269		270
Diluted		275		277
Impact of ASC 606 Adoption | Product [Member] | ASC 606
Revenues:
Net revenues		$ 12		$ 16
Cost of revenues:
Total cost of revenues		(2)		3
Impact of ASC 606 Adoption | Software Maintenance [Member] | ASC 606
Revenues:
Net revenues		(16)		(27)
Cost of revenues:
Total cost of revenues		0		0
Impact of ASC 606 Adoption | Hardware Maintenance and Other Services [Member] | ASC 606
Revenues:
Net revenues		(3)		0
Cost of revenues:
Total cost of revenues		$ (3)		$ (2)

Revenue - Summary of Disaggrega

Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Disaggregation Of Revenue [Line Items]
Net revenues	$ 1,517	$ 1,415	$ 2,991	$ 2,736
Product Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	913	819	1,788	1,546
Strategic
Disaggregation Of Revenue [Line Items]
Net revenues	649	566	1,261	1,064
Mature
Disaggregation Of Revenue [Line Items]
Net revenues	264	253	527	482
Software Maintenance Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	236	224	465	447
Hardware Maintenance and Other Services Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	368	372	738	743
Hardware Maintenance Support Contracts
Disaggregation Of Revenue [Line Items]
Net revenues	303	306	606	604
Professional and Other Services
Disaggregation Of Revenue [Line Items]
Net revenues	$ 65	$ 66	$ 132	$ 139

Revenue - Summary of Components

Revenue - Summary of Components of Deferred Revenue and Financed Unearned Services Revenue (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018	Oct. 27, 2017	Apr. 28, 2017
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	$ 3,206	$ 3,363	$ 3,059	$ 3,213
Short-term	1,538	1,712
Long-term	1,668	1,651
Deferred product revenue
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	102	107
Deferred services revenue
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	3,010	3,134
Financed unearned services revenue
Contract With Customer Liability [Line Items]
Deferred revenue and financed unearned services revenue	$ 94	$ 122

Revenue - Summary of Activity R

Revenue - Summary of Activity Related to Deferred Revenue and Financed Unearned Services Revenue (Detail) - USD ($) $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Contract With Customer Liability [Abstract]
Balance at beginning of period	$ 3,363	$ 3,213
Additions	1,067	1,031
Revenue recognized during the period	(1,224)	(1,185)
Balance at end of period	$ 3,206	$ 3,059

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Disaggregation Of Revenue [Line Items]
Revenue recognized	$ 1,019	$ 1,017
Transaction price allocated to remaining performance obligations	$ 3,206
Minimum
Disaggregation Of Revenue [Line Items]
Deferred sales commissions amortization period	1 year
Maximum
Disaggregation Of Revenue [Line Items]
Deferred sales commissions amortization period	3 years

Revenue - Additional Informat_2

Revenue - Additional Information (Detail1)	Oct. 26, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2018-10-27
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue expected to be recognized	48.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-28
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue expected to be recognized	27.00%

Revenue - Summary of Activity_2

Revenue - Summary of Activity Related to Deferred Commissions (Detail) - USD ($) $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Deferred Revenue Disclosure [Abstract]
Balance at beginning of period	$ 137	$ 113
Additions	35	34
Expense recognized during the period	(41)	(32)
Balance at end of period	$ 131	$ 115

Revenue - Summary of Activity_3

Revenue - Summary of Activity Related to the Balances in Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018	Oct. 27, 2017	Apr. 28, 2017
Deferred Revenue And Credits [Line Items]
Total deferred commissions	$ 131	$ 137	$ 115	$ 113
Other Current Assets
Deferred Revenue And Credits [Line Items]
Total deferred commissions	61	66
Other Noncurrent Assets
Deferred Revenue And Credits [Line Items]
Total deferred commissions	$ 70	$ 71

Other Income, Net (Detail)

Other Income, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Nonoperating Income Expense [Abstract]
Interest income	$ 21	$ 19	$ 46	$ 35
Interest expense	(14)	(17)	(28)	(30)
Other income, net	0	4	7	6
Total other income, net	$ 7	$ 6	$ 25	$ 11

Financial Instruments and Fai_3

Financial Instruments and Fair Value Measurements - Summary of Investments (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	$ 2,126	$ 2,738
Gross unrealized gains	0	1
Gross unrealized losses	(44)	(44)
Estimated fair value	2,082	2,695
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	1,614	1,865
Gross unrealized gains	0	1
Gross unrealized losses	(40)	(39)
Estimated fair value	1,574	1,827
U.S. Treasury and Government Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	362	497
Gross unrealized gains	0	0
Gross unrealized losses	(4)	(5)
Estimated fair value	358	492
Commercial Paper
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	0	230
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	0	230
Certificates of Deposit
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	116	115
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	116	115
Mutual Funds
Schedule of Available-for-sale Securities [Line Items]
Cost or amortized cost	34	31
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	$ 34	$ 31

Financial Instruments and Fai_4

Financial Instruments and Fair Value Measurements - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Oct. 26, 2018	Apr. 27, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other-than-temporary impairment recognized on investments	$ 0	$ 0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	$ 1,524,000,000	$ 1,523,000,000

Financial Instruments and Fai_5

Financial Instruments and Fair Value Measurements - Contractual Maturities of Debt Investments (Detail) $ in Millions	Oct. 26, 2018USD ($)
Investments Debt And Equity Securities [Abstract]
Due in one year or less, Amortized Cost	$ 679
Due after one year through five years, Amortized Cost	835
Due after five years through ten years, Amortized Cost	578
Total, Amortized Cost	2,092
Due in one year or less, Estimated Fair Value	676
Due after one year through five years, Estimated Fair Value	821
Due after five years through ten years, Estimated Fair Value	551
Total, Estimated Fair Value	$ 2,048

Financial Instruments and Fai_6

Financial Instruments and Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) $ in Millions	Oct. 26, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 4,299
Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency exchange contracts assets	5	[1]
Accrued Expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency exchange contracts liabilities	(3)	[2]
Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	1,574
U.S. Treasury and Government Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	358
Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	116
Mutual Funds | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	6	[1]
Mutual Funds | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	28	[3]
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	2,441
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency exchange contracts assets	0	[1]
Quoted Prices in Active Markets for Identical Assets (Level 1) | Accrued Expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency exchange contracts liabilities	0	[2]
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury and Government Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	190
Quoted Prices in Active Markets for Identical Assets (Level 1) | Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	6	[1]
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	28	[3]
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	1,858
Significant Other Observable Inputs (Level 2) | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency exchange contracts assets	5	[1]
Significant Other Observable Inputs (Level 2) | Accrued Expenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency exchange contracts liabilities	(3)	[2]
Significant Other Observable Inputs (Level 2) | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	1,574
Significant Other Observable Inputs (Level 2) | U.S. Treasury and Government Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	168
Significant Other Observable Inputs (Level 2) | Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	116
Significant Other Observable Inputs (Level 2) | Mutual Funds | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	[1]
Significant Other Observable Inputs (Level 2) | Mutual Funds | Other Noncurrent Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	[3]
Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	2,251
Cash | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	2,251
Cash | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 0
[1]	Reported as other current assets in the condensed consolidated balance sheets
[2]	Reported as accrued expenses in the condensed consolidated balance sheets
[3]	Reported as other non-current assets in the condensed consolidated balance sheets

Financing Arrangements - Carryi

Financing Arrangements - Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Debt Instrument [Line Items]
Total senior notes	$ 1,543	$ 1,541
Less: Current portion of long-term debt	(399)	0
Total long-term debt	1,144	1,541
Senior Notes
Debt Instrument [Line Items]
Total principal amount	1,550	1,550
Unamortized discount and issuance costs	(7)	(9)
Senior Notes | Due September 2019
Debt Instrument [Line Items]
Total principal amount	$ 400	$ 400
Debt Instrument, Effective Interest Rate	2.32%	2.32%
Senior Notes | Due June 2021
Debt Instrument [Line Items]
Total principal amount	$ 500	$ 500
Debt Instrument, Effective Interest Rate	3.54%	3.54%
Senior Notes | Due December 2022
Debt Instrument [Line Items]
Total principal amount	$ 250	$ 250
Debt Instrument, Effective Interest Rate	3.43%	3.43%
Senior Notes | Due September 2024
Debt Instrument [Line Items]
Total principal amount	$ 400	$ 400
Debt Instrument, Effective Interest Rate	3.42%	3.42%

Financing Arrangements - Additi

Financing Arrangements - Additional Information (Detail)	1 Months Ended	6 Months Ended	12 Months Ended
	Jul. 28, 2017USD ($)Extension	Oct. 26, 2018USD ($)	Apr. 27, 2018USD ($)
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, amount	$ 1,000,000,000
Credit facility, date expiry	Dec. 10, 2021
Credit facility, increase in facility	$ 300,000,000
Credit facility, number of extensions | Extension	2
Credit facility, extensions period	1 year
Credit facility, amounts drawn		$ 0
Revolving Credit Facility | Letter Of Credit Sub Facility
Debt Instrument [Line Items]
Credit facility, amount	$ 50,000,000
Commercial Paper
Debt Instrument [Line Items]
Notes issued, principal amount		$ 250,000,000	$ 385,000,000
Weighted-average interest rate		2.45%	2.29%
Commercial Paper | Maximum
Debt Instrument [Line Items]
Notes issued, principal amount	$ 1,000,000,000
Debt instrument maturity period	397 days	31 days	32 days
Commercial Paper | Minimum
Debt Instrument [Line Items]
Debt instrument maturity period		4 days	19 days
Senior Notes
Debt Instrument [Line Items]
Notes issued, principal amount		$ 1,550,000,000	$ 1,550,000,000
Senior Notes | Due September 2019
Debt Instrument [Line Items]
Notes issued, principal amount		$ 400,000,000	400,000,000
Notes issued, interest rate		2.00%
Senior Notes | Due June 2021
Debt Instrument [Line Items]
Notes issued, principal amount		$ 500,000,000	500,000,000
Notes issued, interest rate		3.375%
Senior Notes | Due September 2024
Debt Instrument [Line Items]
Notes issued, principal amount		$ 400,000,000	400,000,000
Notes issued, interest rate		3.30%
Senior Notes | Due December 2022
Debt Instrument [Line Items]
Notes issued, principal amount		$ 250,000,000	$ 250,000,000
Notes issued, interest rate		3.25%

Financing Arrangements - Future

Financing Arrangements - Future Principal Debt Maturities (Detail) - Senior Notes - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Debt Instrument [Line Items]
2,020	$ 400
2,022	500
2,023	250
2,025	400
Total	$ 1,550	$ 1,550

Stockholders' Equity - Activity

Stockholders' Equity - Activity Related to Stock Options (Detail) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Oct. 26, 2018USD ($)$ / sharesshares
Number of Shares
Beginning balance, Number of Shares | shares	1
Ending balance, Number of Shares | shares	1
Options Exercisable, Number of Shares | shares	1
Weighted-Average Exercise Price
Beginning balance, Weighted-Average Exercise Price | $ / shares	$ 31.19
Ending balance, Weighted-Average Exercise Price | $ / shares	30.49
Options Exercisable, Weighted-Average Exercise Price | $ / shares	$ 32.21
Weighted-Average Remaining Contractual Term and Aggregate Intrinsic Value
Outstanding, Weighted-Average Remaining Contractual Term	3 years 3 months 7 days
Exercisable, Weighted-Average Remaining Contractual Term	2 years 11 months 1 day
Outstanding, Aggregate Intrinsic Value | $	$ 29
Exercisable, Aggregate Intrinsic Value | $	$ 25

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information Related to Stock Options (Detail) - USD ($) $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Intrinsic value of exercises	$ 22	$ 11
Proceeds received from exercises	17	15
Fair value of options vested	$ 1	$ 5

Stockholders' Equity - Additi_2

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions	Nov. 14, 2018	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to equity awards		$ 337,000,000		$ 337,000,000		$ 337,000,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years				2 years 3 months 18 days
Stock repurchase program, authorized amount		$ 13,600,000,000		$ 13,600,000,000		13,600,000,000
Allocation of purchase price of share repurchases				$ 1,061,000,000		$ 10,700,000,000
Repurchase of common stock, shares				14		298
Average price of common stock repurchased under repurchase program				$ 77.94		$ 35.87
Cash dividends declared, per common share		$ 0.40	$ 0.20	$ 0.80	$ 0.40
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividends declared, per common share	$ 0.40
Cash dividend payable date	Jan. 23, 2019
Cash dividend record date	Jan. 4, 2019
Additional Paid-in Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation of purchase price of share repurchases				$ 597,000,000
Retained Earnings (Accumulated Deficit)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation of purchase price of share repurchases				$ 464,000,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Common stock issued to settle PBRSUs of target shares granted				0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Common stock issued to settle PBRSUs of target shares granted				200.00%
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period				3 years
RSUs grant date fair value		$ 23,000,000		$ 23,000,000		$ 23,000,000
Vesting period, description				For the remaining PBRSUs granted, the number of shares issued will depend upon our achievement against a cumulative Adjusted Operating Income (AOI) target, as defined in the grant agreements, for the three year period from fiscal 2019 through 2021.

Stockholders' Equity - Activi_2

Stockholders' Equity - Activity Related to Restricted Stock Units Including Performance-Based Restricted Stock Units (Detail) - Restricted Stock Units shares in Millions	6 Months Ended
	Oct. 26, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Number of Shares | shares	9
RSUs granted, Number of Shares | shares	3
RSUs vested, Number of Shares | shares	(3)
RSUs forfeited, Number of Shares | shares	(1)
Ending Balance, Number of Shares | shares	8
Beginning Balance, Weighted-Average Grant Date Fair Value | $ / shares	$ 32.91
RSUs granted, Weighted-Average Grant Date Fair Value | $ / shares	63.37
RSUs vested, Weighted-Average Grant Date Fair Value | $ / shares	31.67
RSUs forfeited, Weighted-Average Grant Date Fair Value | $ / shares	34.03
Ending Balance, Weighted-Average Grant Date Fair Value | $ / shares	$ 44.55

Stockholders' Equity - Number a

Stockholders' Equity - Number and Value of Shares Netted for Employee Taxes (Detail) - Restricted Stock Units - USD ($) shares in Millions, $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld for taxes	1	2
Fair value of shares withheld	$ 89	$ 60

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Employee Stock Purchase Plan (ESPP) (Detail) - USD ($) shares in Millions, $ in Millions	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under the ESPP	2	2
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from issuance of shares	$ 49	$ 42

Stockholders' Equity - Stock-Ba

Stockholders' Equity - Stock-Based Compensation Expense (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 38	$ 39	$ 78	$ 87
Income tax benefit for stock-based compensation expense	5	9	10	18
Cost of Product Revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	0	1	1	2
Cost of Hardware Maintenance and Other Services Revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	2	2	5	5
Sales and Marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	16	16	33	37
Research and Development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	12	12	24	27
General and Administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 8	$ 8	$ 15	$ 16

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Activities Related to Stock Repurchase Program (Detail) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended	185 Months Ended
	Oct. 26, 2018USD ($)$ / sharesshares	Oct. 26, 2018USD ($)$ / sharesshares
Equity [Abstract]
Number of shares repurchased | shares	14	298
Average price per share | $ / shares	$ 77.94	$ 35.87
Aggregate purchase price	$ 1,061	$ 10,700
Remaining authorization at end of period	$ 2,939	$ 2,939

Stockholders' Equity - Summar_2

Stockholders' Equity - Summary of Activities Related to Dividends on Common Stock (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Dividends, Common Stock [Abstract]
Dividends per share declared	$ 0.40	$ 0.20	$ 0.80	$ 0.40
Dividend payments			$ 207	$ 108
Additional Paid-in Capital
Dividends, Common Stock [Abstract]
Dividend payments			207	0
Retained Earnings (Accumulated Deficit)
Dividends, Common Stock [Abstract]
Dividend payments			$ 0	$ 108

Stockholders' Equity - Reconcil

Stockholders' Equity - Reconciliation of Retained Earnings (Accumulated Deficit) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		185 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018
Retained Earnings Adjustments [Line Items]
Beginning balance			$ (9)
Net income	$ 241	$ 174	524	$ 305
Repurchases of common stock			(1,061)		$ (10,700)
Ending balance	0		0		0
Retained Earnings (Accumulated Deficit)
Retained Earnings Adjustments [Line Items]
Cumulative-effect of new accounting principle	$ (51)		(51)		$ (51)
Net income			524
Repurchases of common stock			$ (464)

Stockholders' Equity - Accumula

Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) by Component Net of Tax (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			$ 2,276
Other comprehensive income (loss), net of tax			(4)
Amounts reclassified from AOCI, net of tax			(1)
Other comprehensive income (loss)	$ (5)	$ (6)	(5)	$ 10
Ending balance	1,530		1,530
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(27)
Other comprehensive income (loss), net of tax			(3)
Amounts reclassified from AOCI, net of tax			0
Other comprehensive income (loss)			(3)
Ending balance	(30)		(30)
Defined Benefit Obligation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			0
Other comprehensive income (loss), net of tax			0
Amounts reclassified from AOCI, net of tax			(1)
Other comprehensive income (loss)			(1)
Ending balance	(1)		(1)
Unrealized Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(43)
Other comprehensive income (loss), net of tax			(1)
Amounts reclassified from AOCI, net of tax			0
Other comprehensive income (loss)			(1)
Ending balance	(44)		(44)
Accumulated Other Comprehensive Income (Loss) Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(70)
Ending balance	$ (75)		$ (75)

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Schedule of Notional Value of Outstanding Foreign Currency Forward Contracts (Detail) - Foreign Exchange Forward Contracts - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Long | Cash Flow Hedges
Derivative [Line Items]
Forward contracts, Notional Amount	$ 182	$ 0
Non Designated | Long | Balance Sheet Contracts
Derivative [Line Items]
Forward contracts, Notional Amount	237	412
Non Designated | Short | Balance Sheet Contracts
Derivative [Line Items]
Forward contracts, Notional Amount	$ 101	$ 115

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Schedule of Derivative Instruments Not Designated as Cash Flow Hedges (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Foreign Exchange Forward Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency exchange contracts	$ 2	$ 1	$ 12	$ (1)

Restructuring Charges - Additio

Restructuring Charges - Additional Information (Detail)	Jul. 27, 2018	Apr. 28, 2017
May 2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Reduction of global work force	2.00%
November 2016 Restructuring
Restructuring Cost and Reserve [Line Items]
Reduction of global work force		6.00%

Restructuring Charges - Activit

Restructuring Charges - Activities Related to Restructuring Reserves (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			$ 6
Net charges	$ 0	$ 0	19	$ 0
Cash payments			(18)
Balance at end of period	7		7
May 2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			0
Net charges			19
Cash payments			(17)
Balance at end of period	2		2
November 2016 Restructuring
Restructuring Cost and Reserve [Line Items]
Balance at beginning of period			6	13
Net charges			0	0
Cash payments			(1)	(5)
Balance at end of period	$ 5	$ 8	$ 5	$ 8

Income Taxes - Effective Tax Ra

Income Taxes - Effective Tax Rates (Detail)	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017
Income Tax Disclosure [Abstract]
Effective tax rates	7.30%	16.90%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		8 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017	Dec. 31, 2017	Apr. 27, 2018
Income Tax Contingency [Line Items]
Provision (benefit) for income taxes	$ 52	$ 48	$ 41	$ 62
U.S. federal corporate tax rate			21.00%		35.00%
Gross unrecognized tax benefits	356		$ 356
Gross unrecognized tax benefits included in other long-term liabilities	324		324			$ 314
Unrecognized tax benefits that would affect provision for income taxes	$ 306		306
Impact of ASC 606 Adoption | ASC 606
Income Tax Contingency [Line Items]
Provision (benefit) for income taxes		$ (2)	$ (34)	$ (5)

Net Income per Share - Computat

Net Income per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Net income per share:
Net income	$ 241	$ 174	$ 524	$ 305
Shares used in basic computation	258	269	260	270
Dilutive impact of employee equity award plans	6	6	7	7
Shares used in diluted computation	264	275	267	277
Basic	$ 0.93	$ 0.65	$ 2.02	$ 1.13
Diluted	$ 0.91	$ 0.63	$ 1.96	$ 1.10

Net Income per Share - Addition

Net Income per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Earnings Per Share [Abstract]
Outstanding employee equity awards excluded from diluted net income per share calculations	0	1,000,000	0	2,000,000

Segment Geographic and Signific

Segment Geographic and Significant Customer Information - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018USD ($)Segment	Oct. 27, 2017USD ($)	Oct. 26, 2018USD ($)Segment	Oct. 27, 2017USD ($)
Segment Reporting Information [Line Items]
Number of industry segment | Segment	1		1
Net revenues	$ 1,517	$ 1,415	$ 2,991	$ 2,736
U.S.
Segment Reporting Information [Line Items]
Net revenues	$ 789	$ 722	$ 1,550	$ 1,361

Segment Geographic and Signif_2

Segment Geographic and Significant Customer Information - Schedule of Revenues by Geographic Region (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Segment Reporting Information [Line Items]
Net revenues	$ 1,517	$ 1,415	$ 2,991	$ 2,736
United States, Canada And Latin America (Americas)
Segment Reporting Information [Line Items]
Net revenues	868	792	1,711	1,513
Europe, Middle East And Africa (EMEA)
Segment Reporting Information [Line Items]
Net revenues	429	426	859	827
Asia Pacific (APAC)
Segment Reporting Information [Line Items]
Net revenues	$ 220	$ 197	$ 421	$ 396

Segment Geographic and Signif_3

Segment Geographic and Significant Customer Information - Schedule of Cash, Cash Equivalents and Short-Term Investments (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Segment Reporting Information [Line Items]
Cash, cash equivalents and short-term investments	$ 4,299	$ 5,391
U.S.
Segment Reporting Information [Line Items]
Cash, cash equivalents and short-term investments	405	853
International
Segment Reporting Information [Line Items]
Cash, cash equivalents and short-term investments	$ 3,894	$ 4,538

Segment Geographic and Signif_4

Segment Geographic and Significant Customer Information - Schedule of Property and Equipment Net by Geographic Areas (Detail) - USD ($) $ in Millions	Oct. 26, 2018	Apr. 27, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Property and equipment	$ 770	$ 756
U.S.
Segment Reporting, Asset Reconciling Item [Line Items]
Property and equipment	580	566
International
Segment Reporting, Asset Reconciling Item [Line Items]
Property and equipment	$ 190	$ 190

Segment Geographic and Signif_5

Segment Geographic and Significant Customer Information - Significant Customers (Detail) - Net Revenue - Customer Concentration Risk	3 Months Ended		6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Oct. 26, 2018	Oct. 27, 2017
Arrow Electronics, Inc.
Segment Reporting Information [Line Items]
Percentage of net revenues	24.00%	22.00%	23.00%	23.00%
Tech Data Corporation
Segment Reporting Information [Line Items]
Percentage of net revenues	21.00%	19.00%	19.00%	20.00%

Segment Geographic and Signif_6

Segment Geographic and Significant Customer Information - Schedule of Net Accounts Receivable from Significant Customers (Detail) - Accounts Receivable - Credit Concentration Risk	6 Months Ended	12 Months Ended
	Oct. 26, 2018	Apr. 27, 2018
Arrow Electronics, Inc.
Segment Reporting Information [Line Items]
Percentage of net accounts receivable	11.00%	17.00%
Tech Data Corporation
Segment Reporting Information [Line Items]
Percentage of net accounts receivable	24.00%	17.00%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	6 Months Ended
	Oct. 26, 2018	Oct. 27, 2017	Apr. 27, 2018
Commitments and Contingencies Disclosure [Line Items]
Future annual minimum lease payments	$ 172,000,000
Accrued purchase commitments with contract manufacturers	16,000,000		$ 14,000,000
Sale of finance receivables	43,000,000	$ 49,000,000
Legal proceedings and claims	$ 0
Management estimation of loss contingency	Although management at present believes that the ultimate outcome of these proceedings, individually and in the aggregate, will not materially harm our financial position, results of operations, cash flows, or overall trends, legal proceedings are subject to inherent uncertainties, and unfavorable rulings or other events could occur. Unfavorable resolutions could include significant monetary damages. In addition, in matters for which injunctive relief or other conduct remedies are sought, unfavorable resolutions could include an injunction or other order prohibiting us from selling one or more products at all or in particular ways or requiring other remedies. An unfavorable outcome may result in a material adverse impact on our business, results of operations, financial position, and overall trends.
Maximum
Commitments and Contingencies Disclosure [Line Items]
Terms of recourse leases	3 years
Inventory
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	$ 422,000,000
Construction Related
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	5,000,000
Other
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	$ 187,000,000