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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 9 Months Ended
--- | ---
Oct. 31, 2018 | Oct. 31, 2017
Operating activities: |  |
Net loss | $ (145.5) | $ (393.4)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Depreciation, amortization and accretion | 69.8 | 81.5
Stock-based compensation expense | 175.5 | 199.5
Deferred income taxes | 16.5 | 7.3
Restructuring and other exit costs, net | 34.5 | 0.2
Other operating activities | 14.8 | 18.1
Changes in operating assets and liabilities |  |
Accounts receivable | 129.4 | 143.3
Prepaid expenses and other current assets | 8.3 | (6.5)
Accounts payable and accrued liabilities | (181.0) | (69.3)
Deferred revenue | (73.8) | (21.8)
Accrued income taxes | 17.1 | (37.3)
Net cash provided by (used in) operating activities | 65.6 | (78.4)
Investing activities: |  |
Purchases of marketable securities | (135.3) | (419.6)
Sales of marketable securities | 61.3 | 199.2
Maturities of marketable securities | 194.9 | 530.1
Capital expenditures | (49.4) | (39.3)
Acquisitions, net of cash acquired | (34.1) | 0.0
Other investing activities | 2.3 | (11.5)
Net cash provided by investing activities | 39.7 | 258.9
Financing activities: |  |
Proceeds from issuance of common stock, net of issuance costs | 90.1 | 93.2
Taxes paid related to net share settlement of equity awards | (120.7) | (120.6)
Repurchases of common stock | (261.3) | (437.9)
Proceeds from debt, net of discount | 0.0 | 496.9
Repayment of debt | 0.0 | (400.0)
Other financing activities | 0.0 | (5.8)
Net cash used in financing activities | (291.9) | (374.2)
Effect of exchange rate changes on cash and cash equivalents | (15.7) | 5.8
Net decrease in cash and cash equivalents | (202.3) | (187.9)
Cash and cash equivalents at beginning of period | 1,078.0 | 1,213.1
Cash and cash equivalents at end of period | 875.7 | 1,025.2
Non-cash investing activities: |  |
Fair value of common stock issued as consideration for business combination (See Note 8) | $ 44.8 | $ 0.0

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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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