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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Mar. 31, 2018 | Apr. 01, 2017
Statement of Cash Flows [Abstract] |  |
Cash and cash equivalents, beginning of the period | $ 20,289 | $ 20,484
Operating activities: |  |
Net income | 33,887 | 28,920
Adjustments to reconcile net income to cash generated by operating activities: |  |
Depreciation and amortization | 5,484 | 5,319
Share-based compensation expense | 2,644 | 2,473
Deferred income tax expense/(benefit) | (34,235) | 2,822
Other | (151) | (209)
Changes in operating assets and liabilities: |  |
Accounts receivable, net | 3,523 | 4,183
Inventories | (2,807) | (778)
Vendor non-trade receivables | 9,715 | 4,512
Other current and non-current assets | (1,053) | (896)
Accounts payable | (13,220) | (6,862)
Deferred revenue | 478 | (221)
Other current and non-current liabilities | 39,158 | 541
Cash generated by operating activities | 43,423 | 39,804
Investing activities: |  |
Purchases of marketable securities | (48,449) | (99,821)
Proceeds from maturities of marketable securities | 31,884 | 12,429
Proceeds from sales of marketable securities | 38,942 | 60,454
Payments for acquisition of property, plant and equipment | (7,005) | (6,309)
Payments made in connection with business acquisitions, net | (305) | (67)
Other | 53 | (10)
Cash generated by/(used in) investing activities | 15,120 | (33,324)
Financing activities: |  |
Proceeds from issuance of common stock | 327 | 273
Payments for taxes related to net share settlement of equity awards | (1,190) | (788)
Payments for dividends and dividend equivalents | (6,529) | (6,134)
Repurchases of common stock | (32,851) | (18,012)
Proceeds from issuance of term debt, net | 6,969 | 10,975
Repayments of term debt | (500) | 0
Change in commercial paper, net | 1 | 1,879
Cash used in financing activities | (33,773) | (11,807)
Increase/(Decrease) in cash and cash equivalents | 24,770 | (5,327)
Cash and cash equivalents, end of the period | 45,059 | 15,157
Supplemental cash flow disclosure: |  |
Cash paid for income taxes, net | 6,340 | 6,878
Cash paid for interest | $ 1,356 | $ 1,007

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The net cash inflow or cash outflow from issuing (borrowing) and repaying commercial paper. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond 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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- 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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