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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Oct. 27, 2017 | Oct. 28, 2016
Cash flows from operating activities: |  |
Net income | $ 311 | $ 173
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 102 | 117
Stock-based compensation | 87 | 103
Deferred income taxes | 44 | 28
Other items, net | (5) | (15)
Changes in assets and liabilities, net of acquisitions of businesses: |  |
Accounts receivable | 149 | 264
Inventories | 55 | 1
Other operating assets | 38 | 49
Accounts payable | 34 | (13)
Accrued expenses | (68) | (138)
Deferred revenue and financed unearned services revenue | (183) | (179)
Other operating liabilities | 0 | (4)
Net cash provided by operating activities | 564 | 386
Cash flows from investing activities: |  |
Purchases of investments | (609) | (795)
Maturities, sales and collections of investments | 657 | 985
Purchases of property and equipment | (65) | (92)
Acquisitions of businesses, net of cash acquired | (75) | 0
Other investing activities, net | 5 | (1)
Net cash provided by (used in) investing activities | (87) | 97
Cash flows from financing activities: |  |
Proceeds from issuance of common stock under employee stock award plans | 57 | 61
Payments for taxes related to net share settlement of stock awards | (60) | (36)
Repurchase of common stock | (300) | (292)
Proceeds from issuance of commercial paper notes, net | 218 | 0
Issuance of long-term debt, net | 795 | 0
Repayment of short-term loan | 0 | (850)
Dividends paid | (108) | (105)
Other financing activities, net | (1) | (3)
Net cash provided by (used in) financing activities | 601 | (1,225)
Effect of exchange rate changes on cash and cash equivalents | 13 | (13)
Net increase (decrease) in cash and cash equivalents | 1,091 | (755)
Cash and cash equivalents: |  |
Beginning of period | 2,444 | 2,868
End of period | $ 3,535 | $ 2,113

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- Definition The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration