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Financial Assets and Liabilities (Tables) | 12 Months Ended
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Oct. 31, 2016
Financial Assets And Liabilities [Abstract] |
Summary of Available-for-Sale Securities | As of October 31, 2016, the balances of our available-for-sale securities and non-marketable equity securities investments are:
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses Less Than 12 Continuous Months |  | Gross Unrealized Losses 12 Continuous Months or Longer |  | Estimated Fair Value(1)
| (in thousands)
Cash equivalents: |  |  |  |  |  |  |  |  |
Money market funds | $ | 499,274 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 499,274 |
Commercial paper | 1,498 |  |  | — |  |  | — |  |  | — |  |  | 1,498 |
Certificates of deposit | 4,200 |  |  | — |  |  | — |  |  | — |  |  | 4,200 |
Total: | $ | 504,972 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 504,972 |
Short-term investments: |  |  |  |  |  |  |  |  |
U.S. government agency securities | $ | 13,607 |  |  | $ | 4 |  |  | $ | (8 | ) |  | $ | — |  |  | $ | 13,603 |
Certificates of deposit | 12,849 |  |  | — |  |  | — |  |  | — |  |  | 12,849 |
Commercial paper | 25,430 |  |  | 1 |  |  | — |  |  | — |  |  | 25,431 |
Corporate debt securities | 58,753 |  |  | 43 |  |  | (18 | ) |  | — |  |  | 58,778 |
Asset-backed securities | 22,146 |  |  | 12 |  |  | (12 | ) |  | — |  |  | 22,146 |
Non-U.S. government agency securities | 3,403 |  |  | — |  |  | (3 | ) |  | — |  |  | 3,400 |
Other | 4,488 |  |  | — |  |  | — |  |  | — |  |  | 4,488 |
Total: | $ | 140,676 |  |  | $ | 60 |  |  | $ | (41 | ) |  | $ | — |  |  | $ | 140,695 |
Other long-term assets: |  |  |  |  |  |  |  |  |
Non-marketable equity securities | $ | 9,756 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 9,756 |
Total: | $ | 9,756 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 9,756 |
(1) | See Note 6. Fair Value Measures for further discussion on fair values of cash equivalents and investments.
As of October 31, 2015, the balances of our cash equivalents and non-marketable equity securities investments are:
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses Less Than 12 Continuous Months |  | Gross Unrealized Losses 12 Continuous Months or Longer |  | Estimated Fair Value(1)
| (in thousands)
Cash equivalents: |  |  |  |  |  |  |  |  |
Money market funds | $ | 233,839 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 233,839 |
Commercial paper | 1,834 |  |  | — |  |  | — |  |  | — |  |  | $ | 1,834 |
Certificates of deposit | 3,500 |  |  | — |  |  | — |  |  | — |  |  | $ | 3,500 |
Asset-backed securities | 300 |  |  | — |  |  | (1 | ) |  | — |  |  | $ | 299 |
Total: | 239,473 |  |  | — |  |  | (1 | ) |  | — |  |  | 239,472 |
Short-term investments: |  |  |  |  |  |  |  |  |
U.S. government agency securities | 12,615 |  |  | 3 |  |  | (4 | ) |  | — |  |  | 12,614 |
Municipal bonds | 1,403 |  |  | 1 |  |  | (1 | ) |  | — |  |  | 1,403 |
Certificates of deposit | 9,800 |  |  | — |  |  | — |  |  | — |  |  | 9,800 |
Commercial paper | 12,129 |  |  | — |  |  | — |  |  | — |  |  | 12,129 |
Corporate debt securities | 67,201 |  |  | 27 |  |  | (40 | ) |  | — |  |  | 67,188 |
Asset-backed securities | 24,619 |  |  | 2 |  |  | (13 | ) |  | — |  |  | 24,608 |
Non-U.S. government agency securities | 1,007 |  |  | — |  |  | (2 | ) |  | — |  |  | 1,005 |
Total: | 128,774 |  |  | 33 |  |  | (60 | ) |  | — |  |  | 128,747 |
Other long-term assets: |  |  |  |  |  |  |  |  |
Non-marketable equity securities | 10,277 |  |  | — |  |  | — |  |  | — |  |  | 10,277 |
Total: | 10,277 |  |  | — |  |  | — |  |  | — |  |  | 10,277 |
(1) | See Note 6. Fair Value Measures for further discussion on fair values of cash equivalents and investments.
Maturities of Available-for-Sale securities | As of October 31, 2016, the stated maturities of the Company's available-for-sale securities are:
| Amortized Cost |  | Fair Value
| (in thousands)
Due in 1 year or less | $ | 94,439 |  |  | $ | 94,439 |
Due in 2-5 years | 46,200 |  |  | 46,219 |
Due in 6-10 years | 37 |  |  | 37 |
Total | $ | 140,676 |  |  | $ | 140,695 |
Effects on Changes in Fair Values of Non-Designated Forward Contracts | The effects of the changes in the fair values of non-designated forward contracts for fiscal years 2016, 2015 and 2014 are summarized as follows:
| October 31,
| 2016 |  | 2015 |  | 2014
| (in thousands)
Gain (loss) recorded in other income (expense), net | $ | (4,533 | ) |  | $ | (5,554 | ) |  | $ | (3,301 | )
Notional Amounts of Derivative Instruments | The notional amounts in the table below for derivative instruments provide one measure of the transaction volume outstanding:
| As of October 31, 2016 |  | As of October 31, 2015
| (in thousands)
Total gross notional amount | $ | 758,246 |  |  | $ | 781,752 |
Net fair value | $ | (15,358 | ) |  | $ | (3,819 | )
Fair Values of Derivative Instrument Designated and Non-Designated as Hedging Instruments in Balance Sheet | The following represents the balance sheet location and amount of derivative instrument fair values segregated between designated and non-designated hedge instruments:
| Fair Values of derivative instruments designated as hedging instruments |  | Fair Values of derivative instruments not designated as hedging instruments
| (in thousands)
As of October 31, 2016 |  |  |
Other current assets | $ | 4,625 |  |  | $ | 27 |
Accrued liabilities | $ | 19,910 |  |  | $ | 101 |
As of October 31, 2015 |  |  |
Other current assets | $ | 6,461 |  |  | $ | 1 |
Accrued liabilities | $ | 10,141 |  |  | $ | 140 |
Income Statement Location and Amount of Gains and Losses on Derivative Instrument Fair Values for Designated Hedge Instruments, Net of Tax | The following table represents the income statement location and amount of gains and losses on derivative instrument fair values for designated hedge instruments, net of tax:
| Location of gain (loss) recognized in OCI on derivatives |  | Amount of gain (loss) recognized in OCI on derivatives (effective portion) |  | Location of gain (loss) reclassified from OCI |  | Amount of gain (loss) reclassified from OCI (effective portion)
| (in thousands)
Fiscal year ended October 31, 2016 |  |  |  |  |  |  |
Foreign exchange contracts | Revenue |  | $ | (14,580 | ) |  | Revenue |  | $ | (8,585 | )
Foreign exchange contracts | Operating expenses |  | (11,259 | ) |  | Operating expenses |  | (12,125 | )
Total |  |  | $ | (25,839 | ) |  |  |  | $ | (20,710 | )
Fiscal year ended October 31, 2015 |  |  |  |  |  |  |
Foreign exchange contracts | Revenue |  | $ | 3,982 |  |  | Revenue |  | $ | 9,270 |
Foreign exchange contracts | Operating expenses |  | (22,605 | ) |  | Operating expenses |  | (24,193 | )
Total |  |  | $ | (18,623 | ) |  |  |  | $ | (14,923 | )
Fiscal year ended October 31, 2014 |  |  |  |  |  |  |
Foreign exchange contracts | Revenue |  | $ | 5,395 |  |  | Revenue |  | $ | 2,339 |
Foreign exchange contracts | Operating expenses |  | (10,896 | ) |  | Operating expenses |  | 1,543 |
Total |  |  | $ | (5,501 | ) |  |  |  | $ | 3,882 |
Ineffective Portion and Portion Excluded from Effectiveness Testing of Derivative Hedge Gains (Losses) | The following table represents the ineffective portions and portions excluded from effectiveness testing of the hedge gains (losses) for derivative instruments designated as hedging instruments, which are recorded in other income (expense) income, net:
Foreign exchange contracts | Amount of gain (loss) recognized in income statement on derivatives (ineffective portion)(1) |  | Amount of gain (loss) recognized in income statement on derivatives (excluded from effectiveness testing)(2)
| (in thousands)
Fiscal year ended October 31, 2016 | $ | 1,468 |  |  | $ | 6,058 |
Fiscal year ended October 31, 2015 | $ | 878 |  |  | $ | 3,704 |
Fiscal year ended October 31, 2014 | $ | (302 | ) |  | $ | 3,259 |
(1) | The ineffective portion includes forecast inaccuracies.
(2) | The portion excluded from effectiveness testing includes the discount earned or premium paid for the contracts.

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