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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2016 | May 31, 2015 | May 31, 2014
Cash flows from operating activities: |  |  |
Net income | $ 8,901 | $ 9,938 | $ 10,955
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 871 | 712 | 608
Amortization of intangible assets | 1,638 | 2,149 | 2,300
Allowances for doubtful accounts receivable | 130 | 56 | 122
Deferred income taxes | (105) | (548) | (248)
Stock-based compensation | 1,037 | 933 | 805
Tax benefits on the exercise of stock options and vesting of restricted stock-based awards | 311 | 396 | 480
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards | (124) | (244) | (250)
Other, net | 143 | 327 | 311
Changes in operating assets and liabilities, net of effects from acquisitions: |  |  |
Decrease in trade receivables | 96 | 208 | 24
Decrease (increase) in inventories | 88 | (96) | 57
Increase in prepaid expenses and other assets | (90) | (387) | (143)
(Decrease) increase in accounts payable and other liabilities | (13) | 247 | 48
Increase (decrease) in income taxes payable | 2 | (10) | (320)
Increase in deferred revenues | 676 | 655 | 172
Net cash provided by operating activities | 13,561 | 14,336 | 14,921
Cash flows from investing activities: |  |  |
Purchases of marketable securities and other investments | (24,562) | (31,421) | (32,316)
Proceeds from maturities and sales of marketable securities and other investments | 21,247 | 20,004 | 28,845
Acquisitions, net of cash acquired | (650) | (6,239) | (3,488)
Capital expenditures | (1,189) | (1,391) | (580)
Net cash used for investing activities | (5,154) | (19,047) | (7,539)
Cash flows from financing activities: |  |  |
Payments for repurchases of common stock | (10,440) | (8,087) | (9,813)
Proceeds from issuances of common stock | 1,425 | 1,816 | 2,155
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards | (89) | (14) | (20)
Payments of dividends to stockholders | (2,541) | (2,255) | (2,178)
Proceeds from borrowings, net of issuance costs | 3,750 | 19,842 | 5,566
Repayments of borrowings | (2,000) | (1,500) |
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards | 124 | 244 | 250
Distributions to noncontrolling interests | (85) | (196) | (28)
Net cash (used for) provided by financing activities | (9,856) | 9,850 | (4,068)
Effect of exchange rate changes on cash and cash equivalents | (115) | (1,192) | (158)
Net (decrease) increase in cash and cash equivalents | (1,564) | 3,947 | 3,156
Cash and cash equivalents at beginning of period | 21,716 | 17,769 | 14,613
Cash and cash equivalents at end of period | 20,152 | 21,716 | 17,769
Non-cash investing and financing transactions: |  |  |
Fair values of restricted stock-based awards and stock options assumed in connection with acquisitions | 1 | 12 | 148
(Decrease) increase in unsettled repurchases of common stock | (1) | 1 | (15)
(Decrease) increase in unsettled investment purchases | (112) | 264 | 78
Supplemental schedule of cash flow data: |  |  |
Cash paid for income taxes | 2,331 | 3,055 | 2,841
Cash paid for interest | $ 1,616 | $ 1,022 | $ 827

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- Definition The cash outflow to reacquire common stock during the period. + 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 (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + 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 (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References No definition available. + Details
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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: 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=56944662&loc=d3e3602-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + 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=56944662&loc=d3e3602-108585 + Details
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