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Financial Assets and Liabilities (Tables)
 12 Months Ended
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.