Synopsys (SNPS) 10-K 12 Dec 16 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Oct. 31, 2016	Dec. 07, 2016	Apr. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Oct. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	SNPS
Entity Registrant Name	SYNOPSYS INC
Entity Central Index Key	883,241
Current Fiscal Year End Date	--10-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		150,101,203
Entity Public Float			$ 4.8

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Current assets:
Cash and cash equivalents	$ 976,620	$ 836,188
Short-term investments	140,695	128,747
Total cash, cash equivalents and short-term investments	1,117,315	964,935
Accounts receivable, net	438,873	385,694
Income taxes receivable and prepaid taxes	56,091	46,732
Prepaid and other current assets	104,659	71,446
Total current assets	1,716,938	1,468,807
Property and equipment, net	257,035	263,077
Goodwill	2,518,245	2,471,241
Intangible assets, net	266,661	363,659
Long-term prepaid taxes	13,991	18,736
Long-term deferred income taxes	281,926	273,909
Other long-term assets	185,569	186,310
Total assets	5,240,365	5,045,739
Current liabilities:
Accounts payable and accrued liabilities	401,451	385,542
Accrued income taxes	22,693	19,565
Deferred revenue	1,085,802	968,246
Short-term debt	205,000	205,000
Total current liabilities	1,714,946	1,578,353
Long-term accrued income taxes	39,562	37,763
Long-term deferred revenue	79,856	93,613
Other long-term liabilities	210,855	202,021
Total liabilities	2,045,219	1,911,750
Stockholders’ equity:
Preferred Stock, $0.01 par value: 2,000 shares authorized; none outstanding	0	0
Common Stock, $0.01 par value: 400,000 shares authorized; 151,454 and 155,157 shares outstanding, respectively	1,515	1,552
Capital in excess of par value	1,644,675	1,610,460
Retained earnings	1,947,585	1,725,727
Treasury stock, at cost: 5,811 and 2,107 shares, respectively	(294,052)	(98,375)
Accumulated other comprehensive income (loss)	(104,577)	(105,375)
Total stockholders’ equity	3,195,146	3,133,989
Total liabilities and stockholders’ equity	$ 5,240,365	$ 5,045,739

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 3,201	$ 2,561
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	400,000,000	400,000,000
Common Stock, shares outstanding	151,454,000	155,157,000
Treasury stock, shares	5,811,000	2,107,000

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Revenue:
Time-based products	$ 1,910,902	$ 1,792,212	$ 1,699,135
Upfront products	248,137	197,325	135,757
Maintenance and service	263,493	252,674	222,580
Total revenue	2,422,532	2,242,211	2,057,472
Cost of revenue:
Products	346,825	303,633	268,348
Maintenance and service	94,019	105,242	87,226
Amortization of intangible assets	102,118	110,045	101,311
Total cost of revenue	542,962	518,920	456,885
Gross margin	1,879,570	1,723,291	1,600,587
Operating expenses:
Research and development	856,705	776,229	718,768
Sales and marketing	502,368	474,407	453,079
General and administrative	165,962	165,097	155,215
Amortization of intangible assets	27,507	26,004	24,808
Restructuring Charges	9,633	15,088	0
Total operating expenses	1,562,175	1,456,825	1,351,870
Operating income	317,395	266,466	248,717
Other income (expense), net	12,153	15,144	23,425
Income before provision for income taxes	329,548	281,610	272,142
Provision (benefit) for income taxes	62,722	55,676	13,018
Net income	$ 266,826	$ 225,934	$ 259,124
Net income per share:
Basic (in USD per share)	$ 1.76	$ 1.46	$ 1.67
Diluted (in USD per share)	$ 1.73	$ 1.43	$ 1.64
Shares used in computing per share amounts:
Basic (shares)	152,017	154,957	155,054
Diluted (shares)	154,721	158,065	157,710

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 266,826	$ 225,934	$ 259,124
Other comprehensive income (loss):
Change in foreign currency translation adjustment	5,808	(39,567)	(24,093)
Change in unrealized gains (losses) on investments, net of tax of $0, for fiscal years 2016 and 2015	47	(28)	0
Cash flow hedges:
Deferred gains (losses), net of tax of $4,372, $7,107, and $(3,108) for fiscal years 2016, 2015 and 2014, respectively	(25,767)	(18,614)	(5,419)
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $(6,253), $(6,212), and $(125) for fiscal years 2016, 2015 and 2014, respectively	20,710	14,923	(3,882)
Other comprehensive income (loss), net of tax effects	798	(43,286)	(33,394)
Comprehensive income	$ 267,624	$ 182,648	$ 225,730

Consolidated Statements Of Com6

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Statement of Comprehensive Income [Abstract]
Deferred gain (loss), tax	$ 4,372	$ 7,107	$ (3,108)
Reclassification adjustment on deferred (gains) loss included in net income, tax	(6,253)	(6,212)	(125)
Changes in unrealized gains (losses) on available-for-sale securities, tax	$ 0	$ 0	$ 0

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Oct. 31, 2013		154,169
Beginning balance at Oct. 31, 2013	$ 2,788,277	$ 1,542	$ 1,597,244	$ 1,324,854	$ (106,668)	$ (28,695)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	259,124			259,124
Other comprehensive income (loss), net of tax effects	$ (33,394)					(33,394)
Purchases of treasury stock, shares	(3,092)	(3,092)
Purchases of treasury stock, value	$ (119,747)	$ (31)	31		(119,747)
Common stock issued, net of shares withheld for employee taxes (in shares)	4,888	4,888
Common stock issued, net of shares withheld for employee taxes	$ 82,470	$ 49	(62,112)	(32,386)	176,919
Stock compensation expense	79,440		79,440
Balance (in shares) at Oct. 31, 2014		155,965
Ending balance at Oct. 31, 2014	3,056,170	$ 1,560	1,614,603	1,551,592	(49,496)	(62,089)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	225,934			225,934
Other comprehensive income (loss), net of tax effects	$ (43,286)					(43,286)
Purchases of treasury stock, shares	(5,672)	(5,672)
Purchases of treasury stock, value	$ (260,000)	$ (57)	57		(260,000)
Common stock issued, net of shares withheld for employee taxes (in shares)	4,864	4,864
Common stock issued, net of shares withheld for employee taxes	$ 84,526	$ 49	(74,845)	(51,799)	211,121
Stock compensation expense	86,400		86,400
Equity forward contract	(20,000)		(20,000)
Other	4,245		4,245
Balance (in shares) at Oct. 31, 2015		155,157
Ending balance at Oct. 31, 2015	3,133,989	$ 1,552	1,610,460	1,725,727	(98,375)	(105,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	266,826			266,826
Other comprehensive income (loss), net of tax effects	$ 798					798
Purchases of treasury stock, shares	(8,506)	(8,506)
Purchases of treasury stock, value	$ (400,000)	$ (85)	20,085		(420,000)
Common stock issued, net of shares withheld for employee taxes (in shares)	4,803	4,803
Common stock issued, net of shares withheld for employee taxes	$ 98,668	$ 48	(80,735)	(44,968)	224,323
Stock compensation expense	97,583		97,583
Other	(2,718)		(2,718)
Balance (in shares) at Oct. 31, 2016		151,454
Ending balance at Oct. 31, 2016	$ 3,195,146	$ 1,515	$ 1,644,675	$ 1,947,585	$ (294,052)	$ (104,577)

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Cash flow from operating activities:
Net income	$ 266,826	$ 225,934	$ 259,124
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	207,032	211,821	192,826
Stock compensation	97,583	86,400	79,440
Allowance for doubtful accounts	950	1,300	(1,250)
(Gain) loss on sale of investments	(18)	(109)	(6,999)
Deferred income taxes	(14,037)	36,883	(17,100)
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(43,269)	(56,533)	(65,018)
Prepaid and other current assets	(37,641)	(23,106)	1,836
Other long-term assets	(3,770)	(16,259)	(23,270)
Accounts payable and accrued liabilities	18,977	27,568	40,645
Income taxes	7,098	(48,878)	(9,095)
Deferred revenue	86,904	50,139	99,814
Net cash provided by operating activities	586,635	495,160	550,953
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	156,350	109,173	0
Purchases of short-term investments	(168,712)	(238,902)	0
Proceeds from sales of long-term investments	1,785	0	7,774
Purchases of long-term investments	(1,002)	0	0
Purchases of property and equipment	(66,909)	(86,965)	(103,275)
Cash paid for acquisitions and intangible assets, net of cash acquired	(60,056)	(340,153)	(394,623)
Capitalization of software development costs	(4,131)	(3,682)	(3,638)
Other	0	900	(3,488)
Net cash used in investing activities	(142,675)	(559,629)	(497,250)
Cash flows from financing activities:
Proceeds from credit facility	185,000	460,000	200,000
Repayment of debt	(185,000)	(330,425)	(230,968)
Issuances of common stock	125,283	109,764	103,730
Payments for taxes related to net share settlement of equity awards	(26,562)	(24,860)	(21,647)
Purchase of equity forward contract	0	(20,000)	0
Purchases of treasury stock	(400,000)	(260,000)	(119,747)
Other	(5,658)	3,451	(5,057)
Net cash used in financing activities	(306,937)	(62,070)	(73,689)
Effect of exchange rate changes on cash and cash equivalents	3,409	(23,035)	(16,693)
Net change in cash and cash equivalents	140,432	(149,574)	(36,679)
Cash and cash equivalents, beginning of year	836,188	985,762	1,022,441
Cash and cash equivalents, end of year	976,620	836,188	985,762
Supplemental Disclosure of Cash Flow Information:
Income taxes paid	69,447	59,731	40,741
Interest Payments during the year:	$ 3,708	$ 2,710	$ 1,904

Description of Business

Description of Business	12 Months Ended
	Oct. 31, 2016
Accounting Policies [Abstract]
Description of Business	Description of Business Synopsys, Inc. (Synopsys or the Company) provides software, intellectual property and services used by designers across the entire silicon to software spectrum, from engineers creating advanced semiconductors to software developers ensuring the quality and security of their applications. The Company is a global leader in supplying the electronic design automation (EDA) software that engineers use to design and test integrated circuits (ICs), also known as chips. The Company also offers semiconductor intellectual property (IP) products, which are pre-designed circuits that engineers use as components of larger chip designs rather than design those circuits themselves. The Company provides software and hardware used to develop the electronic systems that incorporate chips and the software that runs on them. To complement these offerings, the Company provides technical services and support to help its customers develop advanced chips and electronic systems. The Company is also a leading provider of software tools that developers use to improve the quality and security of software code in a wide variety of industries, including electronics, financial services, energy, industrials, and automotive.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Oct. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Fiscal Year End. The Company’s fiscal year ends on the Saturday nearest to October 31 and consists of 52 weeks, with the exception that approximately every five years, the Company has a 53-week year. Fiscal 2016 , 2015 , and 2014 were 52-week years ending on October 29, 2016, October 31, 2015, and November 1, 2014, respectively. For presentation purposes, the consolidated financial statements and accompanying notes refer to the closest calendar month end. Principles of Consolidation. The consolidated financial statements include the accounts of the Company and all of its subsidiaries. All significant intercompany accounts and transactions have been eliminated. Use of Estimates. To prepare financial statements in conformity with U.S. generally accepted accounting principles (U.S. GAAP), management must make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates and may result in material effects on the Company’s operating results and financial position. Foreign Currency Translation. The functional currency of the majority of the Company’s active foreign subsidiaries is the foreign subsidiary’s local currency. Assets and liabilities that are not denominated in the functional currency are remeasured into the functional currency with any related gain or loss recorded in earnings. The Company translates assets and liabilities of its non-U.S. dollar functional currency foreign operations into the U.S. dollar reporting currency at exchange rates in effect at the balance sheet date. The Company translates income and expense items of such foreign operations into U.S. dollars reporting currency at average exchange rates for the period. Accumulated translation adjustments are reported in stockholders’ equity, as a component of accumulated other comprehensive income (loss). Foreign Currency Contracts. The Company operates internationally and is exposed to potentially adverse movements in currency exchange rates. The Company enters into hedges in the form of foreign currency forward contracts to reduce its exposure to foreign currency rate changes on non-functional currency denominated forecasted transactions and balance sheet positions. The assets or liabilities associated with the forward contracts are recorded at fair value in other current assets or accrued liabilities in the consolidated balance sheet. The accounting for gains and losses resulting from changes in fair value depends on the use of the foreign currency forward contract and whether it is designated and qualifies for hedge accounting. See Note 5. Financial Assets and Liabilities . Fair Values of Financial Instruments. The Company’s cash equivalents, short-term investments and foreign currency contracts are carried at fair value. The fair value of the Company’s accounts receivable and accounts payable approximates the carrying amount due to their short duration. Non-marketable equity securities are carried at cost, net of impairments. The Company performs periodic impairment analysis over these non-marketable equity securities. The carrying amount of the short-term debt approximates the estimated fair value. See Note 6. Fair Value Measures . Cash, Cash Equivalents and Short-term Investments . The Company classifies investments with original maturities of three months or less when acquired as cash equivalents. All of the Company’s short-term investments are classified as available-for-sale and are reported at fair value, with unrealized gains and losses included in stockholders’ equity as a component of accumulated other comprehensive income (loss), net of tax. Those unrealized gains or losses deemed other than temporary are reflected in other income (expense), net. The cost of securities sold is based on the specific identification method and realized gains and losses are included in other income (expense), net. See Note 5. Financial Assets and Liabilities. Concentration of Credit Risk . Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash equivalents, marketable securities, foreign currency contracts, and accounts receivable from trade customers. The Company maintains cash equivalents primarily in highly rated taxable and tax-exempt money market funds located in the U.S. and in various overseas locations. The Company sells its products worldwide primarily to customers in the global electronics market. The Company performs on-going credit evaluations of its customers’ financial condition and does not require collateral. The Company establishes reserves for potential credit losses and such losses have been within management’s expectations and have not been material in any year presented. Accounts Receivable, Net. The balances consist of accounts receivable billed and unbilled. Unbilled accounts receivable represent amounts recorded as revenue which will be invoiced within one year of the balance sheet date. The following table represents the components of accounts receivable, net: October 31, 2016 2015 (in thousands) Accounts receivable $ 394,314 $ 354,688 Unbilled accounts receivable 47,760 33,567 Total accounts receivable 442,074 388,255 Less allowance for doubtful accounts (3,201 ) (2,561 ) Total accounts receivable, net $ 438,873 $ 385,694 Allowance for Doubtful Accounts. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for doubtful accounts to reduce the Company’s receivables to their estimated net realizable value. The Company provides a general reserve on all accounts receivable based on a review of customer accounts. The following table presents the changes in the allowance for doubtful accounts: Fiscal Year Balance at Beginning of Period Provisions Write-offs(1) Balance at End of Period (in thousands) 2016 $ 2,561 $ 950 $ (310 ) $ 3,201 2015 $ 2,026 $ 1,300 $ (765 ) $ 2,561 2014 $ 4,253 $ (1,250 ) $ (977 ) $ 2,026 (1) Balances written off, net of recoveries. Income Taxes. The Company accounts for income taxes using the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company accounts for uncertainty in income taxes using a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining whether it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount which is more than 50% likely of being realized upon ultimate settlement. An uncertain tax position is considered effectively settled on completion of an examination by a taxing authority if certain other conditions are satisfied. Property and Equipment. Property and equipment is recorded at cost less accumulated depreciation. Assets, excluding land, are depreciated using the straight-line method over their estimated useful lives. Leasehold improvements are amortized using the straight-line method over the remaining term of the lease or the economic useful life of the asset, whichever is shorter. Depreciation expenses were $73.8 million , $71.1 million and $63.1 million in fiscal 2016 , 2015 and 2014 , respectively. Repair and maintenance costs are expensed as incurred and such costs were $38.8 million , $32.3 million and $28.7 million in fiscal 2016 , 2015 and 2014 , respectively. A summary of property and equipment, at cost less accumulated depreciation and amortization, as of October 31, 2016 and 2015 is as follows: October 31, 2016 2015 (in thousands) Computer and other equipment $ 486,109 $ 436,425 Buildings 68,194 67,943 Furniture and fixtures 51,589 50,075 Land 20,414 20,414 Leasehold improvements 136,773 142,275 763,079 717,132 Less accumulated depreciation and amortization(1) (506,044 ) (454,055 ) Total $ 257,035 $ 263,077 (1) Accumulated depreciation and amortization includes write-offs due to retirement of fully amortized fixed assets. The useful lives of depreciable assets are as follows: Useful Life in Years Computer and other equipment 3-5 Buildings 30 Furniture and fixtures 5 Leasehold improvements (average) 5 Goodwill. Goodwill represents the excess of the aggregate purchase price over the fair value of the net tangible and identifiable intangible assets acquired by the Company. The carrying amount of goodwill is tested for impairment annually as of October 31 or more frequently if facts and circumstances warrant a review. The Company determined that it is a single reporting unit for the purpose of goodwill impairment tests. For purposes of assessing the impairment of goodwill, the Company estimates the value of the reporting unit using its market capitalization as the best evidence of fair value. This fair value is then compared to the carrying value of the reporting unit. During fiscal 2016 , 2015 and 2014 , there were no indicators of impairment to goodwill. Intangible Assets. Intangible assets consist of acquired technology, certain contract rights, customer relationships, trademarks and trade names, covenants not to compete, capitalized software, and in-process research and development. These intangible assets are either acquired through business combinations, direct purchases, or internally developed capitalized software. Intangible assets are amortized on a straight-line basis over their estimated useful lives which range from one to ten years. The Company continually monitors events and changes in circumstances that could indicate carrying amounts of long-lived assets, including property and equipment and intangible assets, may not be recoverable. When such events or changes in circumstances occur, the Company assesses the recoverability of long-lived assets by determining whether the carrying value of such asset group will be recovered through the undiscounted future cash flow. If the undiscounted future cash flow is less than the carrying amount of the asset group, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the asset group. The Company had no impairments of any long-lived assets in fiscal 2016 , 2015 or 2014 . Restructuring Charges. During fiscal 2016, the Company recorded $9.6 million of restructuring charges for severance and benefits due to involuntary employee terminations, of which $3.9 million was paid in fiscal 2016. As of October 31, 2016, there was a $5.7 million outstanding balance remaining in accounts payable and accrued liabilities as payroll and related benefits in the consolidated balance sheets. The remaining balance will be paid in fiscal 2017. During fiscal 2015, the Company recorded $15.1 million of restructuring charges, pursuant to the fiscal 2015 restructuring program, which included a voluntary retirement program (VRP) and a minimal headcount reduction program. As of October 31, 2015, there was no outstanding balance in restructuring charges. Accounts Payable and Accrued Liabilities. The balance consists of: October 31, 2016 2015 (in thousands) Payroll and related benefits $ 321,430 $ 315,078 Other accrued liabilities 66,276 60,545 Accounts payable 13,745 9,919 Total $ 401,451 $ 385,542 Other Long-term Liabilities. The balance consists of: October 31, 2016 2015 (in thousands) Deferred compensation liability (See Note 10 ) $ 163,185 $ 158,462 Other long-term liabilities 47,670 43,559 Total $ 210,855 $ 202,021 Other Comprehensive Income (Loss). Other comprehensive income (loss) (OCI) includes all changes in equity during a period, such as accumulated net translation adjustments, unrealized gain (loss) on certain foreign currency forward contracts that qualify as cash flow hedges, reclassification adjustments related to cash flow hedges and unrealized gain (loss) on investments. See Note 8 . Accumulated Other Comprehensive Income (Loss) . Revenue Recognition. The Company generates revenue from the sale of products that include software licenses, maintenance and professional services and to a lesser extent, hardware products. Software license revenue consists of fees associated with the licensing of the Company's software. Maintenance and professional service revenue consists of maintenance fees associated with perpetual and term licenses and professional services fees. Hardware revenue consists of sales of Field Programmable Gate Array (FPGA)-based emulation and prototyping products. Most of the Company's customer arrangements are complex, involving hundreds of products and various license rights, bundled with post-contract customer support and additional meaningful rights that provide a complete end-to-end solution to the customer. Throughout the contract, the Company's customers are typically using a myriad of products to complete each phase of a chip design and are concurrently working on multiple chip designs, or projects, in different phases of the design. During this time, the customer looks to the Company to release state-of-the-art technology as the Company keeps up with the pace of change, to address requested enhancements to the Company's tools to meet customer specifications, to provide support at each stage of the customer’s design, including the final manufacturing of the chip (the tape out stage), and other important services. With respect to software licenses, the Company utilizes three license types: • Technology Subscription Licenses (TSLs). TSLs are time-based licenses for a finite term, and generally provide the customer limited rights to receive, or to exchange certain quantities of licensed software for, unspecified future technology. The majority of the Company's arrangements are TSLs due to the nature of the business and customer requirements. In addition to the licenses, the arrangements also include: post-contract customer support, which includes providing frequent updates and upgrades to maintain the utility of the software due to rapid changes in technology; other intertwined services such as multiple copies of the tools; assisting the Company's customers in applying the Company's technology in their development environment; and rights to remix licenses for other licenses. • Term licenses. The Company also infrequently enters into certain license arrangements wherein licenses are provided for a finite term without any other services or rights, including rights to receive, or to exchange licensed software for, unspecified future technology. Customers purchase maintenance separately for the first year and may renew annually for the balance of the term. The annual maintenance fee is typically calculated as a percentage of the net license fee. • Perpetual licenses. Perpetual licenses continue as long as the customer renews maintenance plus an additional 20 years. Perpetual licenses do not provide the customer any rights to receive, or to exchange licensed software for, unspecified future technology. Customers purchase maintenance separately for the first year and may renew annually. For the three software license types, the Company recognizes revenue as follows: • TSLs. The Company typically recognizes revenue from TSL fees ratably over the term of the license period, or as customer installments become due and payable, whichever is later. Revenue attributable to TSLs is reported as “time-based products revenue” in the consolidated statements of operations. • Term licenses. The Company recognizes revenue from term licenses in full upon shipment of the software if payment terms require the customer to pay at least 75% of the license fee and 100% of the maintenance fee within one year from shipment and all other revenue recognition criteria are met. Revenue attributable to these term licenses is reported as “upfront products revenue” in the consolidated statements of operations. For term licenses in which less than 75% of the license fee and 100% of the maintenance fee is payable within one year from shipment, the Company recognizes revenue as customer payments become due and payable. Such revenue is reported as “time-based products revenue” in the consolidated statements of operations. • Perpetual licenses. The Company recognizes revenue from perpetual licenses in full upon shipment of the software if payment terms require the customer to pay at least 75% of the license fee and 100% of the maintenance fee within one year from shipment and all other revenue recognition criteria are met. Revenue attributable to these perpetual licenses is reported as “upfront products revenue” in the consolidated statements of operations. For perpetual licenses in which less than 75% of the license fee and 100% of the maintenance fee is payable within one year from shipment, the Company recognizes revenue as customer installments become due and payable. Such revenue is reported as “time-based products revenue” in the consolidated statements of operations. The Company's maintenance and service revenue consists of maintenance fees associated with perpetual and term software licenses and professional services fees. The Company recognizes revenue from maintenance arrangements ratably over the maintenance period to the extent cash has been received or fees become due and payable, and recognize revenue from professional services and training fees as such services are performed and accepted by the customer. Revenue attributable to maintenance, professional services and training is reported as “maintenance and service revenue” in the consolidated statements of operations. Hardware revenue consists of sales of FPGA-based emulation and prototyping products. The Company recognizes revenue from sales of hardware products in full upon shipment if all other revenue recognition criteria are met. Revenue attributable to these sales is reported as “upfront products revenue” in the consolidated statements of operations and is not material to the Company's total revenue. The Company also enters into arrangements in which portions of revenue are contingent upon the occurrence of uncertain future events, for example, royalty arrangements. The Company refers to this revenue as “contingent revenue.” Contingent revenue is recognized if and when the event that removes the contingency occurs. Such revenue is reported as “time-based products revenue” in the consolidated statements of operations. These arrangements are not material to the Company’s total revenue. The Company infrequently enters into multiple-element arrangements that contain both software and non-software deliverables such as hardware. The Company has determined that the software and non-software deliverables in the Company’s contracts are separate units of accounting. The Company recognizes revenue for the separate units of accounting when all revenue recognition criteria are met. Revenue allocated to hardware units of accounting is recognized upon shipment when all other revenue recognition criteria are met. Revenue allocated to software units of accounting is recognized depending on the software license type (TSL, term license or perpetual license). Such arrangements have not had a material effect on the Company’s consolidated financial statements and are not expected to have a material effect in future periods. The Company also enters into arrangements to deliver software products, either alone or together with other products or services that require significant modification, or customization of the software. The Company accounts for such arrangements using the percentage of completion method as the Company has the ability to make reasonably dependable estimates that relate to the extent of progress toward completion, contract revenues and costs. The Company measures the progress towards completion using the labor hours incurred to complete the project. Revenue attributable to these arrangements is reported as “maintenance and service revenue” in the consolidated statements of operations. The Company determines the fair value of each element in multiple element software arrangements that only contain software and software-related deliverables based on vendor-specific objective evidence (VSOE). The Company limits assessment of VSOE of fair value for each element to the price charged when such element is sold separately. The Company has analyzed all of the elements included in multiple-element software arrangements and has determined that the Company has sufficient VSOE to allocate revenue to the maintenance components of the Company’s perpetual and term license products and to professional services. Accordingly, assuming all other revenue recognition criteria are met, the Company recognizes license revenue from perpetual and term licenses upon delivery using the residual method, recognizes revenue from maintenance ratably over the maintenance term, and recognizes revenue from professional services as services are performed and accepted by the customer. With respect to TSL arrangements, due to the complexity of the tools, the complexity of the arrangement terms and intertwined services, the license, maintenance and other services are not separable and are considered as a combined unit. Additionally, the Company does not have sufficient VSOE of fair value to allocate the fee between these services. Therefore, we recognize revenue from TSLs ratably over the term of the license, assuming all other revenue recognition criteria are met The Company makes judgments related to revenue recognition. Specifically, in connection with each transaction involving the Company’s products, the Company must evaluate whether: (1) persuasive evidence of an arrangement exists, (2) delivery of software or services has occurred, (3) the fee for such software or services is fixed or determinable, and (4) collectability is probable. All four of these criteria must be met in order for the Company to recognize revenue with respect to a particular arrangement. The Company applies these revenue recognition criteria as follows: • Persuasive Evidence of an Arrangement Exists. Prior to recognizing revenue on an arrangement, the Company’s customary policy is to have a written contract, signed by both the customer and by the Company or a purchase order from those customers that have previously negotiated a standard end-user license arrangement or purchase agreement. • Delivery Has Occurred. The Company delivers its products to its customers electronically or physically. For electronic deliveries, delivery occurs when the Company provides access to its customers to take immediate possession of the software through downloading it to the customer’s hardware. For physical deliveries, the standard transfer terms are typically Freight on Board (FOB) shipping point. The Company generally ships its products or license keys promptly after acceptance of customer orders. However, a number of factors can affect the timing of product shipments and, as a result, timing of revenue recognition, including the delivery dates requested by customers and the Company's operational capacity to fulfill product orders at the end of a fiscal quarter. • The Fee is Fixed or Determinable. The Company’s determination that an arrangement fee is fixed or determinable depends principally on the arrangement’s payment terms. The Company’s standard payment terms for perpetual and term licenses require 75% or more of the license fee and 100% of the maintenance fee to be paid within one year. If the arrangement includes these terms, the Company regards the fee as fixed or determinable, and recognizes all license revenue under the arrangement in full upon delivery (assuming all other revenue recognition criteria are met). If the arrangement does not include these terms, the Company does not consider the fee to be fixed or determinable and generally recognizes revenue when customer installments are due and payable. In the case of a TSL, because of the right to exchange products or receive unspecified future technology and because VSOE for maintenance services does not exist for a TSL, the Company recognizes revenue ratably over the term of the license, but not in advance of when customers’ installments become due and payable. • Collectability is Probable. The Company judges collectability of the arrangement fees on a customer-by-customer basis pursuant to its credit review policy. The Company typically sells to customers with whom it has a history of successful collection. For a new customer, or when an existing customer substantially expands its commitments, the Company evaluates the customer’s financial position and ability to pay and typically assigns a credit limit based on that review. The Company increases the credit limit only after it has established a successful collection history with the customer. If the Company determines at any time that collectability is not probable under a particular arrangement based upon its credit review process or the customer’s payment history, the Company recognizes revenue under that arrangement as customer payments are actually received. Warranties and Indemnities. The Company generally warrants its products to be free from defects in media and to substantially conform to material specifications for a period of 90 days for software products and for up to six months for hardware systems. In certain cases, the Company also provides its customers with limited indemnification with respect to claims that their use of the Company’s software products infringes on United States patents, copyrights, trademarks or trade secrets. The Company is unable to estimate the potential impact of these commitments on the future results of operations. To date, the Company has not been required to pay any material warranty claims. Net Income Per Share. The Company computes basic income per share by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted net income per share reflects the dilution from potential common shares outstanding such as stock options and unvested restricted stock units and awards during the period using the treasury stock method. The table below reconciles the weighted average common shares used to calculate basic net income per share with the weighted average common shares used to calculate diluted net income per share: Year Ended October 31, 2016 2015 2014 (in thousands) Numerator: Net income $ 266,826 $ 225,934 $ 259,124 Denominator: Weighted average common shares for basic net income per share 152,017 154,957 155,054 Dilutive effect of common share equivalents from equity—based compensation 2,704 3,108 2,656 Weighted average common shares for diluted net income per share 154,721 158,065 157,710 Net income per share: Basic $ 1.76 $ 1.46 $ 1.67 Diluted $ 1.73 $ 1.43 $ 1.64 Anti-dilutive employee stock-based awards excluded(1) 1,971 1,363 2,196 (1) These stock options and unvested restricted stock units were anti-dilutive for the respective periods and are excluded in calculating diluted net income per share. While such awards were anti-dilutive for the respective periods, they could be dilutive in the future.

Business Combinations

Business Combinations	12 Months Ended
	Oct. 31, 2016
Business Combinations [Abstract]
Business Combinations and Acquisition of Non-controlling Interest	Business Combinations Fiscal 2016 Acquisitions During fiscal 2016, the Company completed several acquisitions. The aggregated total purchase consideration was $56.6 million , net of cash acquired. The Company does not consider these acquisitions to be material, individually or in the aggregate, to the Company’s consolidated financial statements. The preliminary purchase price allocations resulted in $39.2 million of goodwill, of which $6.1 million is deductible for tax purposes, and $23.5 million of acquired identifiable intangible assets valued using the income method. The intangible assets are being amortized over their respective useful lives ranging from one to seven years. The acquisition-related costs for these acquisitions totaling $4.2 million were expensed as incurred in the consolidated statement of operations. The Company funded the acquisitions with existing cash. The preliminary fair value estimates for the assets acquired and liabilities assumed for all fiscal 2016 acquisitions are not yet finalized and may change as additional information becomes available during the respective measurement periods. The primary areas of those preliminary estimates relate to certain tangible assets and liabilities, identifiable intangible assets, and taxes. Additional information, which existed as of the acquisition date but is yet unknown to the Company, may become known to the Company during the remainder of the measurement period, a period not to exceed 12 months from the acquisition date. Changes to the provisional amounts recorded as assets or liabilities during the measurement period may result in an adjustment to goodwill.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Oct. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill: (in thousands) Balance at October 31, 2014 $ 2,255,708 Additions 233,989 Adjustments 684 Effect of foreign currency translation (19,140 ) Balance at October 31, 2015 $ 2,471,241 Additions 39,172 Adjustments 435 Effect of foreign currency translation 7,397 Balance at October 31, 2016(1) $ 2,518,245 (1) There is no accumulated impairment of goodwill for periods presented. Intangible assets as of October 31, 2016 consist of the following: Gross Assets Accumulated Amortization Net Assets (in thousands) Core/developed technology $ 610,812 $ 460,722 $ 150,090 Customer relationships 235,997 139,932 96,065 Contract rights intangible 171,248 162,183 9,065 Trademarks and trade names 20,729 13,821 6,908 Capitalized software development costs 29,642 25,109 4,533 Total $ 1,068,428 $ 801,767 $ 266,661 Intangible assets as of October 31, 2015 consist of the following: Gross Assets Accumulated Amortization Net Assets (in thousands) Core/developed technology $ 584,293 $ 375,395 $ 208,898 Customer relationships 231,908 115,170 116,738 Contract rights intangible 168,153 144,293 23,860 Trademarks and trade names 20,729 10,665 10,064 Capitalized software development costs 25,511 21,412 4,099 Total $ 1,030,594 $ 666,935 $ 363,659 Amortization expense related to intangible assets consisted of the following: Year Ended October 31, 2016 2015 2014 (in thousands) Core/developed technology $ 85,331 $ 76,674 $ 70,675 Customer relationships 24,594 23,104 22,470 Contract rights intangible 16,543 33,350 30,665 Trademarks and trade names 3,156 2,900 2,309 Capitalized software development costs(1) 3,697 3,653 3,581 Total $ 133,321 $ 139,681 $ 129,700 (1) Amortization of capitalized software development costs is included in cost of products revenue in the consolidated statements of operations. The following table presents the estimated future amortization of intangible assets: Fiscal Year (in thousands) 2017 $ 97,109 2018 71,091 2019 46,551 2020 31,683 2021 14,865 2022 and thereafter 5,362 Total $ 266,661

Financial Assets and Liabilitie

Financial Assets and Liabilities	12 Months Ended
	Oct. 31, 2016
Financial Assets And Liabilities [Abstract]
Financial Assets and Liabilities	Financial Assets and Liabilities Cash equivalents and short-term investments. The Company classifies time deposits and other investments with maturities less than three months as cash equivalents. Debt securities and other investments with maturities longer than three months are classified as short-term investments. The Company’s investments generally have a term of less than three years and are classified as available-for-sale carried at fair value, with unrealized gains and losses included in the consolidated balance sheets as a component of accumulated other comprehensive income (loss), net of tax. Those unrealized gains or losses deemed other than temporary are reflected in other income (expense), net. The cost of securities sold is based on the specific identification method and realized gains and losses are included in other income (expense), net. As of October 31, 2016 , the balances of our available-for-sale securities and non-marketable equity securities investments are: Cost Gross Gross Gross Estimated (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 Gross Gross Estimated (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. 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 Non-marketable equity securities. The Company’s strategic investment portfolio consists of non-marketable equity securities in privately held companies. The securities accounted for as cost method investments are reported at cost, net of impairment losses. Securities accounted for as equity method investments are recorded at cost plus the proportional share of the issuers’ income or loss, which is recorded in the Company’s other income (expense), net. The cost basis of securities sold is based on the specific identification method. Refer to Note 6. Fair Value Measures. Derivatives. The Company recognizes derivative instruments as either assets or liabilities in the consolidated financial statements at fair value and provides qualitative and quantitative disclosures about such derivatives. The Company operates internationally and is exposed to potentially adverse movements in foreign currency exchange rates. The Company enters into hedges in the form of foreign currency forward contracts to reduce its exposure to foreign currency rate changes on non-functional currency denominated forecasted transactions and balance sheet positions including: (1) certain assets and liabilities, (2) shipments forecasted to occur within approximately 1 month, (3) future billings and revenue on previously shipped orders, and (4) certain future intercompany invoices denominated in foreign currencies. The duration of forward contracts ranges from approximately one month to 22 months , the majority of which are short-term. The Company does not use foreign currency forward contracts for speculative or trading purposes. The Company enters into foreign exchange forward contracts with high credit quality financial institutions that are rated ‘A’ or above and to date has not experienced nonperformance by counterparties. Further, the Company anticipates continued performance by all counterparties to such agreements. The assets or liabilities associated with the forward contracts are recorded at fair value in other current assets or accrued liabilities in the consolidated balance sheets. The accounting for gains and losses resulting from changes in fair value depends on the use of the foreign currency forward contract and whether it is designated and qualifies for hedge accounting. Cash Flow Hedging Activities Certain foreign exchange forward contracts are designated and qualify as cash flow hedges. These contracts have durations of approximately 22 months or less. Certain forward contracts are rolled over periodically to capture the full length of exposure to the Company’s foreign currency risk, which can be up to three years . To receive hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge, and the hedges must be highly effective in offsetting changes to future cash flows on the hedged transactions. The effective portion of gains or losses resulting from changes in fair value of these hedges is initially reported, net of tax, as a component of other comprehensive income (loss) (OCI), in stockholders’ equity and reclassified into revenue or operating expenses, as appropriate, at the time the hedged transactions affect earnings. We expect a majority of the hedge balance in OCI to be reclassified to the statements of operations within the next twelve months. Hedging effectiveness is evaluated monthly using spot rates, with any gain or loss caused by hedging ineffectiveness recorded in other income (expense), net. The premium/discount component of the forward contracts is recorded to other income (expense), net, and is not included in evaluating hedging effectiveness. Non-designated Hedging Activities The Company’s foreign exchange forward contracts that are used to hedge non-functional currency denominated balance sheet assets and liabilities are not designated as hedging instruments. Accordingly, any gains or losses from changes in the fair value of the forward contracts are recorded in other income (expense), net. The gains and losses on these forward contracts generally offset the gains and losses associated with the underlying assets and liabilities, which are also recorded in other income (expense), net. The duration of the forward contracts for hedging the Company’s balance sheet exposure is approximately one month . The Company also has certain foreign exchange forward contracts for hedging certain international revenues and expenses that are not designated as hedging instruments. Accordingly, any gains or losses from changes in the fair value of the forward contracts are recorded in other income (expense), net. The gains and losses on these forward contracts generally offset the gains and losses associated with the foreign currency in operating income. The duration of these forward contracts is usually less than one year. The overall goal of the Company’s hedging program is to minimize the impact of currency fluctuations on its net income over its fiscal year. 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 ) 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 ) The notional amounts for derivative instruments do not represent the amount of the Company’s exposure to market gain or loss. The Company’s exposure to market gain or loss will vary over time as a function of currency exchange rates. The amounts ultimately realized upon settlement of these financial instruments, together with the gains and losses on the underlying exposures, will depend on actual market conditions during the remaining life of the instruments. 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 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 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. Other Commitments - Credit and Term Loan Facilities On February 17, 2012, the Company entered into an agreement with several lenders (the Credit Agreement) providing for (i) a $350.0 million senior unsecured revolving credit facility (the Revolver) and (ii) a $150.0 million senior unsecured term loan facility (the Term Loan). Principal payments on a portion of the Term Loan were due in equal quarterly installments of $7.5 million , with the remaining balance paid in October 2016. On May 19, 2015, the Credit Agreement was amended and restated in order to increase the size of the Revolver from $350.0 million to $500.0 million and to extend the termination date of the Revolver from October 14, 2016 to May 19, 2020. The amended and restated Credit Agreement also replaced a financial covenant requiring the Company to maintain a minimum specified level of cash with a covenant requiring a minimum interest coverage ratio. Subject to obtaining additional commitments from lenders, the principal amount of the loans provided under the amended and restated Credit Agreement may be increased by the Company by up to an additional $150.0 million through May 2019. The amended and restated Credit Agreement contains financial covenants requiring the Company to operate within a maximum leverage ratio and maintain a minimum interest coverage ratio, as well as other non-financial covenants. As of October 31, 2016 , the Company was in compliance with all financial covenants. As of October 31, 2016 , the Company had no outstanding balance under the Term Loan and a $205.0 million outstanding balance under the Revolver, which are considered short-term liabilities. As of October 31, 2015 , the Company had a $45.0 million outstanding balance under the Term Loan and a 160.0 million outstanding balance under the Revolver, all of which are considered short-term liabilities. Borrowings bear interest at a floating rate based on a margin over the Company’s choice of market observable base rates as defined in the amended and restated Credit Agreement. As of October 31, 2016 , the applicable interest rate for the Revolver was LIBOR +1.000% . In addition, commitment fees are payable on the Revolver at rates between 0.125% and 0.200% per year based on the Company’s leverage ratio on the daily amount of the revolving commitment. On November 28, 2016, the Company entered into an amended and restated credit agreement with several lenders (the November 2016 Agreement) providing for a $650.0 million senior unsecured revolving credit facility (the Revolver) and a new $150.0 million senior unsecured term loan facility (the 2016 Term Loan). The November 2016 Agreement amends and restates the Company’s previous Credit Agreement referred to above, in order to increase the size of the revolving credit facility from $500.0 million to $650.0 million , provide a new $150.0 million senior unsecured term loan facility and to extend the termination date of the revolving credit facility from May 19, 2020 to November 28, 2021. The terms and conditions of the 2016 Restated Credit Agreement are similar to the May 2015 amended and restated agreement. Subject to obtaining additional commitments from lenders, the principal amount of the loans provided under the November 2016 Agreement may be increased by the Company by up to an additional $150.0 million . During the first quarter of fiscal 2017, the Company received funding of $150.0 million under the 2016 Term Loan. The total outstanding balance of the Revolver and the 2016 Term Loan as of December 9, 2016 is $205.0 million and $150.0 million , respectively. The Company expects its borrowings under the Credit Agreement will fluctuate from quarter to quarter. The carrying amount of the short-term and long-term debt approximates the estimated fair value. These borrowings under the amended and restated credit agreement have a variable interest rate structure and are classified within Level 2 of the fair value hierarchy.

Fair Value Measures

Fair Value Measures	12 Months Ended
	Oct. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measures	Fair Value Measures Accounting Standards Codification (ASC) 820-10, Fair Value Measurements and Disclosures , defines fair value, establishes guidelines and enhances disclosure requirements for fair value measurements. The accounting guidance requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The accounting guidance also establishes a fair value hierarchy based on the independence of the source and objective evidence of the inputs used. There are three fair value hierarchies based upon the level of inputs that are significant to fair value measurement: Level 1 —Observable inputs that reflect quoted prices (unadjusted) for identical instruments in active markets; Level 2 —Observable inputs other than quoted prices included in Level 1 for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-driven valuations in which all significant inputs and significant value drivers are observable in active markets; and Level 3 —Unobservable inputs to the valuation derived from fair valuation techniques in which one or more significant inputs or significant value drivers are unobservable. On a recurring basis, the Company measures the fair value of certain of its assets and liabilities, which include cash equivalents, short-term investments, non-qualified deferred compensation plan assets, and foreign currency derivative contracts. The Company’s cash equivalents and short-term investments are classified within Level 1 or Level 2 because they are valued using quoted market prices in an active market or alternative independent pricing sources and models utilizing market observable inputs. The Company’s non-qualified deferred compensation plan assets consist of money market and mutual funds invested in domestic and international marketable securities that are directly observable in active markets and are therefore classified within Level 1. The Company’s foreign currency derivative contracts are classified within Level 2 because these contracts are not actively traded and the valuation inputs are based on quoted prices and market observable data of similar instruments. The Company’s borrowings under its credit and term loan facilities are classified within Level 2 because these borrowings are not actively traded and have a variable interest rate structure based upon market rates currently available to the Company for debt with similar terms and maturities. Refer to Note 5. Financial Assets and Liabilities. Assets/Liabilities Measured at Fair Value on a Recurring Basis Assets and liabilities measured at fair value on a recurring basis are summarized below as of October 31, 2016 : Fair Value Measurement Using Description Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Assets Cash equivalents: Money market funds $ 499,274 $ 499,274 $ — $ — Commercial paper 1,498 — 1,498 — Certificates of deposit 4,200 — 4,200 — Short-term investments: U.S. government agency securities 13,603 — 13,603 — Certificates of deposit 12,849 — 12,849 — Commercial paper 25,431 — 25,431 — Corporate debt securities 58,778 — 58,778 — Asset-backed securities 22,146 — 22,146 — Non-U.S. government agency securities 3,400 — 3,400 — Other 4,488 4,488 — — Prepaid and other current assets: Foreign currency derivative contracts 4,652 — 4,652 — Other long-term assets: Deferred compensation plan assets 163,185 163,185 — — Total assets $ 813,504 $ 666,947 $ 146,557 $ — Liabilities Accounts payable and accrued liabilities: Foreign currency derivative contracts $ 20,010 $ — $ 20,010 $ — Other long-term liabilities: Deferred compensation plan liabilities 163,185 163,185 — — Total liabilities $ 183,195 $ 163,185 $ 20,010 $ — Assets and liabilities measured at fair value on a recurring basis are summarized below as of October 31, 2015 : Description Total Fair Value Measurement Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Assets 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 299 — 299 — Short-term investments: U.S. government agency securities 12,614 — 12,614 — Municipal bonds 1,403 — 1,403 — Certificates of deposit 9,800 — 9,800 — Commercial paper 12,129 — 12,129 — Corporate debt securities 67,188 — 67,188 — Asset-backed securities 24,608 — 24,608 — Non-U.S. government agency securities 1,005 — 1,005 — Prepaid and other current assets: Foreign currency derivative contracts 6,462 — 6,462 — Other long-term assets: Deferred compensation plan assets 158,462 158,462 — — Total assets $ 533,143 $ 392,301 $ 140,842 $ — Liabilities Accounts payable and accrued liabilities: Foreign currency derivative contracts $ 10,281 $ — $ 10,281 $ — Other long-term liabilities: Deferred compensation plan liabilities 158,462 158,462 — — Total liabilities $ 168,743 $ 158,462 $ 10,281 $ — Assets/Liabilities Measured at Fair Value on a Non-Recurring Basis Non-Marketable Equity Securities Equity investments in privately-held companies, also called non-marketable equity securities, are accounted for using either the cost or equity method of accounting. The non-marketable equity securities are measured and recorded at fair value when an event or circumstance which impacts the fair value of these securities indicates an other-than-temporary decline in value has occurred. In such events, these equity investments would be classified within Level 3 as they are valued using significant unobservable inputs or data in an inactive market, and the valuation requires management judgment due to the absence of market price and inherent lack of liquidity. The Company monitors these investments and generally uses the income approach to assess impairments based primarily on the financial conditions of these companies. The Company did not recognize any impairment during fiscal 2016 , 2015 and 2014 .

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Oct. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Lease Commitments The Company leases certain of its domestic and foreign facilities and certain office equipment under non-cancelable lease agreements. The lease agreements generally require the Company to pay property taxes, insurance, maintenance and repair costs. Rent expenses were $63.9 million , $ 67.6 million and $65.6 million in fiscal 2016 , 2015 and 2014 , respectively. The Company charges operating lease payments to expense using the straight-line method. The Company subleases portions of its facilities and records sublease payments as a reduction of rent expense. The Company's principal offices are located in two office buildings in Mountain View, California. The buildings together provide approximately 341,000 square feet. This space is leased through August 2030, and the Company has two options to extend the lease term, the first to extend the term by ten years, followed by a second option to extend by approximately nine additional years. As of October 31, 2016 , anticipated future minimum lease payments on all non-cancellable operating leases with a term in excess of one year, net of sublease income are as follows: Minimum Lease Payments Sublease Income Net (in thousands) Fiscal Year 2017 $ 52,373 $ 2,141 $ 50,232 2018 50,938 2,173 48,765 2019 46,506 2,179 44,327 2020 35,835 2,239 33,596 2021 28,801 2,184 26,617 Thereafter 171,040 2,247 168,793 Total $ 385,493 $ 13,163 $ 372,330 Legal Proceedings The Company is subject to routine legal proceedings, as well as demands, claims and threatened litigation that arise in the normal course of its business. The ultimate outcome of any litigation is uncertain and unfavorable outcomes could have a negative impact on the Company’s results of operations and financial condition. The Company reviews the status of each significant matter and assesses its potential financial exposure. If the potential loss from any claim or legal proceeding is considered probable and the amount is estimable, the Company accrues a liability for the estimated loss. The Company has determined that no disclosure of estimated loss is required for a claim against the Company because: (a) there is not a reasonable possibility that a loss exceeding amounts already recognized (if any) may be incurred with respect to such claim; (b) a reasonably possible loss or range of loss cannot be estimated; or (c) such estimate is immaterial. Mentor Patent Litigation The Company is engaged in complex patent litigation with Mentor Graphics Corporation (Mentor) involving several actions in different forums. The Company acquired Emulation & Verification Engineering S.A. (EVE) on October 4, 2012. At the time of the acquisition, EVE and EVE-USA, Inc. (collectively, the EVE Parties) were defendants in three patent infringement lawsuits filed by Mentor. Mentor filed suit against the EVE Parties in federal district court in the District of Oregon on August 16, 2010 alleging that EVE’s ZeBu products infringed Mentor’s United States Patent No. 6,876,962. Mentor filed an additional suit in federal district court in the District of Oregon on August 17, 2012 alleging that EVE’s ZeBu products infringed Mentor’s United States Patent No. 6,947,882. Both cases sought compensatory damages, including lost profits and royalties, and a permanent injunction. Mentor also filed a patent infringement lawsuit against Nihon EVE K.K. in Tokyo District Court in 2010 alleging that certain ZeBu products infringe Mentor’s Japanese Patent No. P3,588,324. This case sought compensatory damages, a permanent injunction and destruction of inventory. On May 15, 2015, the Tokyo District Court ruled that such products did not infringe Mentor's patent. Mentor appealed the decision. On March 30, 2016, the Japan IP High Court affirmed the District Court's ruling in our favor. On September 27, 2012, the Company and the EVE Parties filed an action for declaratory relief against Mentor in federal district court in the Northern District of California, seeking a determination that Mentor’s United States Patents Nos. 6,009,531; 5,649,176 and 6,240,376, which were the subject of a patent infringement lawsuit filed by Mentor against EVE in 2006 and settled in the same year, are invalid and not infringed by EVE’s products. Mentor asserted patent infringement counterclaims in this action based on the same three patents and sought compensatory damages, including lost profits and royalties, and a permanent injunction. In April 2013, this action was transferred to the federal district court in Oregon and consolidated with the two Mentor lawsuits in that district (the Oregon Action). The Oregon Action. In the Oregon Action, the Company and the EVE Parties further asserted patent infringement counterclaims against Mentor based on the Company’s United States Patents Nos. 6,132,109 and 7,069,526, seeking compensatory damages and a permanent injunction. After pre-trial summary judgment rulings, the only patent remaining at issue in the Oregon Action was Mentor's ‘376 patent. The Oregon Action went to trial on the remaining Mentor patent, and a jury reached a verdict on October 10, 2014 finding that certain features of the ZeBu products infringed the ‘376 patent and assessing damages of approximately $36 million . On March 12, 2015, the court entered an injunction prohibiting certain sales activities relating to the features found by the jury to infringe. The Company has released a new version of ZeBu software that does not include such features. Both parties have appealed the court's rulings. The hearing on such appeal was held on June 9, 2016, and the court has yet to issue a decision. The Company has accrued an immaterial amount as a loss contingency. The Company cannot estimate a range of losses, if any, exceeding the amount already accrued. The California Action. On December 21, 2012, the Company filed an action for patent infringement against Mentor in federal district court in the Northern District of California, alleging that Mentor’s Veloce products infringe the Company’s United States Patents Nos. 5,748,488, 5,530,841, 5,680,318 and 6,836,420 (the California Action). This case seeks compensatory damages and a permanent injunction. The court stayed the action as to the ‘420 patent pending the U.S. Patent and Trademark Office's inter partes review of that patent and appeals from that proceeding. On January 20, 2015, the court granted Mentor's motion for summary judgment on the ‘488, ‘841, and ‘318 patents, finding that such patents were invalid. The Company has appealed the court's ruling. The hearing on such appeal was held on June 9, 2016. On October 17, 2016, the Federal Circuit affirmed the court’s decision. PTO Proceedings. On September 26, 2012, the Company filed two inter partes review requests with the U.S. Patent and Trademark Office (the PTO) challenging the validity of Mentor’s ‘376 and ‘882 patents. The PTO granted review of the ‘376 patent and denied review of the ‘882 patent. On February 19, 2014, the PTO issued its final decision in the review of the ‘376 patent, finding some of the challenged claims invalid and some of the challenged claims valid. On April 22, 2014, the Company appealed to the Federal Circuit from the PTO’s decision finding certain claims valid. Mentor filed a cross-appeal on May 2, 2014 from the PTO's decision finding certain claims invalid. On February 10, 2016, the Federal Circuit affirmed the PTO's decision in all respects. On December 21, 2013, Mentor filed an inter partes review request with the PTO challenging the validity of the Company’s ‘420 patent. On June 11, 2015, the PTO issued its final decision in the review, finding all of the challenged claims invalid. On August 12, 2015, the Company appealed to the Federal Circuit from the PTO's decision. On October 11, 2016, the Federal Circuit affirmed the PTO’s decision. On September 30, 2016, Synopsys filed a petition requesting ex parte reexamination of the ‘376 patent. On November 10, 2016, the PTO instituted reexamination of the ‘376 patent.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Oct. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Components of accumulated other comprehensive income (loss), on an after-tax basis where applicable, were as follows: Year Ended October 31, 2016 2015 (in thousands) Cumulative currency translation adjustments $ (84,700 ) $ (90,508 ) Unrealized gain (loss) on derivative instruments, net of taxes (19,896 ) (14,839 ) Unrealized gain (loss) on available-for-sale securities, net of taxes 19 (28 ) Total accumulated other comprehensive income (loss) $ (104,577 ) $ (105,375 ) The effect of amounts reclassified out of each component of accumulated other comprehensive income (loss) into net income was as follows: Year Ended October 31, 2016 2015 2014 (in thousands) Reclassifications from accumulated other comprehensive income (loss) into consolidated statement of operations: Gain (loss) on cash flow hedges, net of taxes Revenues $ (8,585 ) $ 9,270 $ 2,339 Operating expenses (12,125 ) (24,193 ) 1,543 Gain (loss) on available-for-sale securities Other income (expense) 18 41 — Total reclassifications into net income $ (20,692 ) $ (14,882 ) $ 3,882 Amounts reclassified in fiscal 2016 , 2015 and 2014 primarily consisted of gains (losses) from the Company’s cash flow hedging activities. See Note 5. Financial Assets and Liabilities.

Stock Repurchase Program

Stock Repurchase Program	12 Months Ended
	Oct. 31, 2016
Stock Repurchase Program [Abstract]
Stock Repurchase Program	Stock Repurchase Program The Company’s Board of Directors (Board) approved a stock repurchase program in 2002 pursuant to which the Company was authorized to purchase up to $500.0 million of its common stock, and has periodically replenished the stock repurchase program to such amount. The Board last replenished the stock repurchase program up to $500.0 million on August 31, 2016. The program does not obligate Synopsys to acquire any particular amount of common stock, and the program may be suspended or terminated at any time by Synopsys’ Chief Financial Officer or the Board. The Company repurchases shares to offset dilution caused by ongoing stock issuances from existing equity plans for equity compensation awards and issuances related to acquisitions, and when management believes it is a good use of cash. Repurchases are transacted in accordance with Rule 10b-18 of the Securities Exchange Act of 1934 (Exchange Act) and may be made through any means including, but not limited to, open market purchases, plans executed under Rule 10b5-1(c) of the Exchange Act and structured transactions. As of October 31, 2016 , $435.5 million remained available for further repurchases under the program . In August 2015, the Company entered into an accelerated share repurchase agreement (the August 2015 ASR) to repurchase an aggregate of $100.0 million of the Company’s common stock. Pursuant to the August 2015 ASR, the Company made a prepayment of $100.0 million and received an initial share delivery of shares valued at $80.0 million . The remaining balance of $20.0 million was settled in the first quarter of fiscal 2016. Total shares purchased under the August 2015 ASR were approximately 2.1 million shares, at an average purchase price of $48.06 per share. In December 2015, the Company entered into two simultaneous accelerated share repurchase agreements (December 2015 ASRs) to repurchase an aggregate of $200.0 million of the Company’s common stock. Pursuant to the December 2015 ASRs, the Company made a prepayment of $200.0 million and received initial share deliveries of shares valued at $160.0 million . The December 2015 ASRs expired on April 29, 2016 with $20.0 million settled in April 2016 and the final $20.0 million settled in May 2016. Total shares purchased under the December 2015 ASRs were approximately 4.5 million shares, at an average purchase price of $44.40 per share. In May 2016, the Company entered into an accelerated share repurchase agreement (the May 2016 ASR) to repurchase an aggregate of $125.0 million of the Company’s common stock. Pursuant to the May 2016 ASR, the Company made a prepayment of $125.0 million and received initial share deliveries of shares valued at $100.0 million . The remaining balance of $25.0 million was settled in August 2016. Total shares purchased under the May 2016 ASR were approximately 2.4 million shares, at an average purchase price of $52.98 per share. In December 2016, the Company entered into an accelerated share repurchase agreement (the December 2016 ASR) to repurchase an aggregate of $100.0 million of the Company’s common stock. Pursuant to the December 2016 ASR, the Company made a prepayment of $100.0 million and received initial share deliveries of shares valued at $80.0 million . The remaining balance of $20.0 million is anticipated to be settled on or before February 16, 2017, upon completion of the repurchase. Under the terms of the December 2016 ASR, the specific number of shares that the Company ultimately repurchases will be based on the volume-weighted average share price of the Company’s common stock during the repurchase period, less a discount. The following table summarizes stock repurchase activities as well as the reissuance of treasury stock for employee stock compensation purposes: Year Ended October 31, 2016 2015 2014 (in thousands, except per share price) Shares repurchased 8,506 5,672 3,092 Average purchase price per share $ 49.37 $ 45.84 $ 38.72 Aggregate purchase price $ 420,000 $ 260,000 $ 119,747 Reissuance of treasury stock 4,803 4,864 4,888

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Oct. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Benefit Plans	Employee Benefit Plans Employee Stock Purchase Plan Under the Company’s Employee Stock Purchase Plan (ESPP), employees are granted the right to purchase shares of common stock at a price per share that is 85% of the lesser of the fair market value of the shares at (1) the beginning of a rolling two year offering period or (2) the end of each semi-annual purchase period, subject to a plan limit on the number of shares that may be purchased in a purchase period. On March 29, 2016, the Company’s stockholders approved an amendment to the ESPP to increase the number of shares of common stock authorized for issuance under the plan by 5.0 million shares. During fiscal 2016 , 2015 and 2014 , the Company issued 1.6 million , 1.7 million , and 1.8 million shares, respectively, under the ESPP at average per share prices of $37.77 , $31.55 and $30.00 , respectively. As of October 31, 2016 , 8.7 million shares of common stock were reserved for future issuance under the ESPP. Equity Compensation Plans 2006 Employee Equity Incentive Plan. On April 25, 2006, the Company’s stockholders approved the 2006 Employee Equity Incentive Plan (2006 Employee Plan), which provides for the grant of incentive stock options, non-statutory stock options, restricted stock awards, restricted stock unit awards, stock appreciation rights and other forms of equity compensation, including performance stock awards and performance cash awards, as determined by the plan administrator. The terms and conditions of each type of award are set forth in the 2006 Employee Plan. Options granted under this plan have a contractual term of seven years and generally vest over four years. On March 29, 2016, the Company's stockholders approved an amendment to increase the number of shares of common stock reserved for future issuance under the 2006 Employee Plan by 3.8 million shares. As of October 31, 2016 , an aggregate of 6.3 million stock options and 4.0 million restricted stock units were outstanding, and 11.2 million shares were available for future issuance under the 2006 Employee Plan. 2005 Non-Employee Directors Equity Incentive Plan. On May 23, 2005, the Company’s stockholders approved the 2005 Non-Employee Directors Equity Incentive Plan (the 2005 Directors Plan). The 2005 Directors Plan provides for annual equity awards to non-employee directors in the form of stock options, restricted stock or a combination thereof. The Company’s stockholders have approved an aggregate of 0.8 million shares of common stock reserved under the 2005 Directors Plan. As of October 31, 2016 , the Company has issued an aggregate of 363,782 shares of restricted stock awards with an aggregate grant date fair value of approximately $11.5 million under the 2005 Directors Plan. Restricted stock awards vest over a period of three years. In addition, the Company granted options to purchase 157,871 shares of common stock, which vest over a period of three to four years, with an aggregate grant date fair value of $4.7 million , to non-employee directors during fiscal 2007, fiscal 2011, and fiscal 2015. As of October 31, 2016 , 42,588 shares of restricted stock were unvested and 76,369 stock options were outstanding, and a total of 241,690 shares of common stock were reserved for future grant under the 2005 Directors Plan. Other Assumed Stock Plans through Acquisitions. In connection with the Company’s acquisitions in fiscal 2008, fiscal 2010, fiscal 2012, fiscal 2014, and fiscal 2015, the Company assumed certain outstanding stock awards of acquired companies. If these assumed equity awards are canceled, forfeited or expire unexercised, the underlying shares do not become available for future grant. As of October 31, 2016 , 0.4 million shares of the Company’s common stock remained subject to such outstanding assumed equity awards. Restricted Stock Units. Since fiscal 2007, restricted stock units are granted under the 2006 Employee Plan as part of the Company’s new hire and annual incentive compensation program. Restricted stock units are valued based on the closing price of the Company’s common stock on the grant date. In general, restricted stock units vest over three to four years and are subject to the employee's continuing service with the Company. For each restricted stock unit granted under the 2006 Employee Plan, a share reserve ratio is applied for the purpose of determining the remaining number of shares reserved for future grants under the plan. On April 3, 2012, the Company's stockholders approved an amendment of the 2006 Employee Plan to prospectively change the share reserve ratio from 1.25 to 1.50 . On April 2, 2015, the stockholders approved amending the share reserve ratio from 1.50 to 1.60 . On March 29, 2016, the stockholders approved amending the share reserve ratio from 1.60 to 1.70 . The following table contains information concerning activities related to restricted stock units: Restricted Stock Units Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Life (In Years) Aggregate Fair Value (in thousands, except per share and life amounts) Balance at October 31, 2013 3,983 $ 31.23 1.51 Granted 1,645 $ 39.03 Vested(1) (1,564 ) $ 29.07 $ 60,815 Forfeited (117 ) $ 32.95 Balance at October 31, 2014 3,947 $ 35.29 1.53 Granted 1,707 $ 48.13 Vested(1) (1,522 ) $ 33.05 $ 73,677 Forfeited (204 ) $ 37.68 Balance at October 31, 2015 3,928 $ 41.61 1.54 Granted 1,765 $ 49.59 Vested(1) (1,547 ) $ 38.33 $ 79,558 Forfeited (111 ) $ 43.12 Balance at October 31, 2016 4,035 $ 46.37 1.56 (1) The number of vested restricted stock units includes shares that were withheld on behalf of employees to satisfy the minimum statutory tax withholding requirements. The following table contains additional information concerning activities related to stock options and restricted stock units under all equity plans, other than shares available for grant under the 2005 Directors Plan: Available for Grant(3) Options(2) Options Outstanding Weighted- Average Exercise Price per Share Weighted- Average Remaining Contractual Life (In Years) Aggregate Intrinsic Value (in thousands, except per share and life amounts) Balance at October 31, 2013 8,472 7,726 $ 26.87 4.30 $ 71,700 Options Granted (1,686 ) 1,686 $ 38.65 Options Assumed(2) 843 $ 24.63 Options Exercised (2,103 ) $ 24.47 Options Canceled/forfeited/expired 163 (402 ) $ 27.44 Restricted stock units granted(1) (2,468 ) Restricted stock units forfeited(1) 174 Additional shares reserved 7,500 Balance at October 31, 2014 12,155 7,750 $ 29.81 4.66 $ 86,537 Options Granted (1,908 ) 1,942 $ 45.14 Options Assumed(2) 133 $ 38.97 Options Exercised (2,125 ) $ 26.06 Options Canceled/forfeited/expired 230 (411 ) $ 33.51 Restricted stock units granted(1) (2,707 ) Restricted stock units forfeited(1) 313 Additional shares reserved 3,800 Balance at October 31, 2015 11,883 7,289 $ 34.94 4.67 $ 109,627 Options Granted (1,685 ) 1,685 $ 47.39 Options Exercised (2,154 ) $ 30.06 Options Canceled/forfeited/expired 33 (65 ) $ 35.31 Restricted stock units granted(1) (2,967 ) Restricted stock units forfeited(1) 180 Additional shares reserved 3,800 Balance at October 31, 2016 11,244 6,755 $ 39.59 4.65 $ 126,850 Vested and expected to vest as of October 31, 2016 6,641 $ 39.48 4.63 $ 125,429 Exercisable at October 31, 2016 3,282 $ 34.46 3.67 $ 78,478 (1) These amounts do not reflect the actual number of restricted stock units granted or forfeited but rather the effect on the total remaining shares available for future grants after the application of the share reserve ratio. For more information about the share reserve ratio, please see Restricted Stock Units above. (2) The Company assumed options outstanding under various plans through acquisitions. (3) Excluding shares reserved for future issuance under the 2005 Directors Plan. The aggregate intrinsic value in the preceding table represents the pretax intrinsic value based on stock options with an exercise price less than the Company’s closing stock price of $58.37 as of October 31, 2016 . The pretax intrinsic value of options exercised and their average exercise prices were: Year Ended October 31, 2016 2015 2014 (in thousands, except per share price) Intrinsic value $ 51,408 $ 44,104 $ 32,094 Average exercise price per share $ 30.06 $ 26.06 $ 24.47 Restricted stock award activities during fiscal 2016 under the 2005 Directors Plan are summarized as follows: Restricted Shares Weighted-Average Grant Date Fair Value (in thousands, except per share) Unvested at October 31, 2015 45 $ 41.82 Granted 21 $ 48.27 Vested (23 ) $ 39.94 Forfeited — $ — Unvested at October 31, 2016 43 $ 45.97 Valuation and Expense of Stock Compensation. The Company estimates the fair value of stock-based awards in the form of stock options and employee stock purchase rights under employee stock purchase plans on the grant date. The value of awards expected to vest is recognized as expense over the applicable service periods. The Company uses the straight-line attribution method to recognize stock compensation costs over the service period of the award. The Company uses the Black-Scholes option-pricing model to determine the fair value of stock options, stock appreciation rights and employee stock purchase plan awards . The Black-Scholes option-pricing model incorporates various subjective assumptions including expected volatility, expected term and interest rates. The expected volatility for both stock options and stock purchase rights under the ESPP is estimated by a combination of implied volatility for publicly traded options of the Company’s common stock with a term of six months or longer and the historical stock price volatility over the estimated expected term of the Company’s stock-based awards. The expected term of the Company’s stock-based awards is based on historical experience. The assumptions presented in the following table were used to estimate the fair value of stock options and employee stock purchase rights granted under the Company’s stock plans or stock plans assumed from acquisitions: Year Ended October 31, 2016 2015 2014 Stock Options Expected life (in years) 4.1 4.3 4.5 Risk-free interest rate 1.06% - 1.63% 1.24% - 1.58% 1.38% - 1.74% Volatility 19.21%-21.62% 16.92%-21.76% 18.38%-20.00% Weighted average estimated fair value $8.97 $8.77 $10.95 ESPP Expected life (in years) 0.5 - 2.0 0.5 - 2.0 0.5 - 2.0 Risk-free interest rate 0.53% - 0.86% 0.12% - 0.75% 0.05% - 0.58% Volatility 17.03% - 25.46% 18.01% - 21.60% 16.84% - 18.78% Weighted average estimated fair value $12.75 $11.11 $9.17 The following table presents stock compensation expense for fiscal 2016 , 2015 and 2014 , respectively: Year Ended October 31, 2016 2015 2014 (in thousands) Cost of products $ 11,006 $ 9,162 $ 8,122 Cost of maintenance and service 2,418 2,164 2,336 Research and development expense 49,511 43,431 38,241 Sales and marketing expense 19,690 17,744 16,754 General and administrative expense 14,958 13,899 13,987 Stock compensation expense before taxes 97,583 86,400 79,440 Income tax benefit (25,967 ) (20,071 ) (18,224 ) Stock compensation expense after taxes $ 71,616 $ 66,329 $ 61,216 As of October 31, 2016 , the Company had $173.8 million of total unrecognized stock compensation expense relating to options and restricted stock units and awards, which is expected to be recognized over a weighted average period of 2.5 years. Deferred Compensation Plan. The Company maintains the Synopsys Deferred Compensation Plan (the Deferred Plan), which permits eligible employees to defer up to 50% of their annual cash base compensation and up to 100% of their eligible cash variable compensation. Amounts may be withdrawn from the Deferred Plan pursuant to elections made by the employees in accordance with the terms of the plan. Since the inception of the Deferred Plan, the Company has not made any matching or discretionary contributions to the Deferred Plan. There are no Deferred Plan provisions that provide for any guarantees or minimum return on investments. Undistributed amounts under the Deferred Plan are subject to the claims of the Company’s creditors. The securities held by the Deferred Plan are classified as trading securities. Deferred Plan Assets and Liabilities are as follows: As of October 31, 2016 As of October 31, 2015 (In thousands) Plan assets recorded in other long-term assets $ 163,185 $ 158,462 Plan liabilities recorded in other long-term liabilities(1) $ 163,185 $ 158,462 (1) Undistributed deferred compensation balances due to participants. Income or loss from the change in fair value of the Deferred Plan assets is recorded in other income (expense), net. The increase or decrease in the fair value of the undistributed Deferred Plan obligation is recorded in total cost of revenue and operating expense. The following table summarizes the impact of the Deferred Plan: Year Ended October 31, 2016 2015 2014 (in thousands) Increase (reduction) to cost of revenue and operating expense $ 4,400 $ 3,701 $ 10,856 Other income (expense), net 4,400 3,701 10,856 Net increase (decrease) to net income $ — $ — $ — Other Retirement Plans. The Company sponsors various retirement plans for its eligible U.S. and non-U.S. employees. Total contributions to these plans were $53.4 million , $40.0 million and $23.8 million in fiscal 2016 , 2015 and 2014 , respectively. For employees in the United States and Canada, the Company matches pretax employee contributions up to a maximum of U.S. $3,000 and Canadian $4,000 , respectively, per participant per year.

Income Taxes

Income Taxes	12 Months Ended
	Oct. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The domestic and foreign components of the Company’s total income (loss) before provision for income taxes are as follows: Year Ended October 31, 2016 2015 2014 (in thousands) United States $ 22,134 $ 42,571 $ (7,638 ) Foreign 307,414 239,039 279,780 Total income (loss) before provision for income taxes $ 329,548 $ 281,610 $ 272,142 The components of the (benefit) provision for income taxes were as follows: Year Ended October 31, 2016 2015 2014 (in thousands) Current: Federal $ (6,106 ) $ (21,911 ) $ (14,951 ) State 2,670 1,385 279 Foreign 80,195 39,319 42,085 76,759 18,793 27,413 Deferred: Federal (23,510 ) 44,462 (4,612 ) State 11,950 (2,282 ) (4,141 ) Foreign (2,477 ) (5,297 ) (5,642 ) (14,037 ) 36,883 (14,395 ) Provision (benefit) for income taxes $ 62,722 $ 55,676 $ 13,018 The provision (benefit) for income taxes differs from the taxes computed with the statutory federal income tax rate as follows: Year Ended October 31, 2016 2015 2014 (in thousands) Statutory federal tax $ 115,343 $ 98,564 $ 95,251 State tax (benefit), net of federal effect (1) 11,015 (4,764 ) (4,306 ) Tax credits (2) (36,979 ) (13,301 ) (5,153 ) Tax on foreign earnings less than U.S. statutory tax (68,246 ) (56,536 ) (61,376 ) Tax settlements (16,479 ) (6,251 ) (19,645 ) Stock based compensation 5,709 5,406 5,675 Changes in valuation allowance 428 (216 ) (235 ) Federal statute lapses — (2,265 ) (6,746 ) Integration of acquired technologies 37,525 33,015 4,715 Undistributed earnings of foreign subsidiaries 9,595 — — Other 4,811 2,024 4,838 Provision (benefit) for income taxes $ 62,722 $ 55,676 $ 13,018 (1) State tax (benefit), net of federal effect, includes changes in valuation allowance of $25.1 million , $2.4 million and $1.9 million for fiscal years 2016, 2015 and 2014, respectively. (2) Tax credits include benefits from the retroactive reinstatement of the U.S. federal research tax credit. The U.S. federal research tax credit expired on December 31, 2013, resulting in only two months of credit for fiscal 2014. The credit was reinstated in fiscal 2015, resulting in a tax benefit of approximately $12.4 million in the above amount for the period January 1 through December 31, 2014. The credit was permanently reinstated in fiscal 2016, resulting in a tax benefit of approximately $37.1 million in the above amount for the period January 1, 2015 through October 31, 2016. The integration of acquired technologies represents the income tax effect resulting from the transfer of certain intangible assets among company-controlled entities. The income tax effect is generally recognized over five years. These intangible assets generally result from the acquisition of technology by a company-controlled entity as part of a business or asset acquisition. The tax impact of the integration of acquired technologies in fiscal 2016 was $37.5 million compared to $33.0 million in fiscal 2015 and $4.7 million in fiscal 2014. The tax impact in fiscal 2016 and fiscal 2015 was higher compared to fiscal 2014 due to the higher value of the intangible assets that were transferred to certain wholly owned foreign subsidiaries in November 2014. The significant components of deferred tax assets and liabilities were as follows: October 31, 2016 2015 (in thousands) Net deferred tax assets: Deferred tax assets: Accruals and reserves $ 34,324 $ 40,373 Deferred revenue 42,497 36,460 Deferred compensation 64,321 69,716 Capitalized costs 54,123 60,998 Capitalized research and development costs 18,896 24,748 Stock compensation 22,298 18,001 Tax loss carryovers 31,748 50,987 Foreign tax credit carryovers 10,369 1,064 Research and other tax credit carryovers 136,690 80,327 Other 5,161 5,340 Gross deferred tax assets 420,427 388,014 Valuation allowance (73,909 ) (48,700 ) Total deferred tax assets 346,518 339,314 Deferred tax liabilities: Intangible assets 54,604 66,345 Undistributed earnings of foreign subsidiaries 10,888 933 Total deferred tax liabilities 65,492 67,278 Net deferred tax assets $ 281,026 $ 272,036 It is more likely than not that the results of future operations will be able to generate sufficient taxable income to realize the net deferred tax assets. The valuation allowance provided against our deferred tax assets as of October 31, 2016 is mainly attributable to California research credit and international foreign tax credit carryforwards. The valuation allowance increased by a net of $25.2 million in fiscal 2016 primarily due to a change in the expected realizability of deferred tax assets related to California research credit carryforwards resulting in part from the impact of audit adjustments agreed to during fiscal 2016. The Company has the following tax loss and credit carryforwards available to offset future income tax liabilities: Carryforward Amount Expiration Date (in thousands) Federal net operating loss carryforward $ 73,226 2018-2034 Federal research credit carryforward 172,959 2019-2036 Federal foreign tax credit carryforward 2,946 2019-2022 International foreign tax credit carryforward 9,445 Indefinite California research credit carryforward 160,442 Indefinite Other state research credit carryforward 7,145 2017-2031 State net operating loss carryforward 36,735 2017-2036 The federal and state net operating loss carryforward is from acquired companies and the annual use of such loss is subject to significant limitations under Internal Revenue Code Section 382. Foreign tax credits may only be used to offset tax attributable to foreign source income. The federal research tax credit was permanently reinstated in fiscal 2016 . The Company has unrecognized deferred tax assets of approximately $106.5 million as of October 31, 2016 attributable to excess tax deductions related to stock options, the benefit of which will be credited to stockholders' equity upon adoption of Accounting Standards Update (ASU) 2016-09, "Compensation-Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting", in the first quarter of fiscal 2017. See Note 14. Effect of New Accounting Pronouncements for further discussion. The Company has provided for the U.S. income tax liability on foreign earnings, except for foreign earnings that are considered indefinitely reinvested outside of the U.S. If the cumulative foreign earnings exceed the amount the Company intends to reinvest in foreign country operations in the future, the Company would provide for taxes on such excess amount. As of October 31, 2016 , there were approximately $1,143.2 million of earnings upon which U.S. income taxes of approximately $248.0 million have not been provided for. The gross unrecognized tax benefits decreased by approximately $25.5 million during fiscal 2016 resulting in gross unrecognized tax benefits of $106.5 million as of October 31, 2016 . A reconciliation of the beginning and ending balance of gross unrecognized tax benefits is summarized as follows: As of October 31, 2016 As of October 31, 2015 (in thousands) Beginning balance $ 132,054 $ 124,102 Increases in unrecognized tax benefits related to prior year tax positions 7,205 10,922 Decreases in unrecognized tax benefits related to prior year tax positions (43,944 ) (7,526 ) Increases in unrecognized tax benefits related to current year tax positions 13,880 13,232 Decreases in unrecognized tax benefits related to settlements with taxing authorities (333 ) — Reductions in unrecognized tax benefits due to lapse of applicable statute of limitations (2,659 ) (5,996 ) Increases in unrecognized tax benefits acquired 49 976 Changes in unrecognized tax benefits due to foreign currency translation 290 (3,656 ) Ending balance $ 106,542 $ 132,054 As of October 31, 2016 and 2015 , approximately $106.5 million and $129.4 million , respectively, of the unrecognized tax benefits would affect our effective tax rate if recognized upon resolution of the uncertain tax positions. Interest and penalties related to estimated obligations for tax positions taken in the Company’s tax returns are recognized as a component of income tax expense (benefit) in the consolidated statements of operations and totaled approximately $0.8 million , $0.6 million and $0.5 million for fiscal years 2016 , 2015 and 2014 , respectively. As of October 31, 2016 and 2015 , the combined amount of accrued interest and penalties related to tax positions taken on the Company’s tax returns was approximately $3.1 million and $2.2 million , respectively. The timing of the resolution of income tax examinations is highly uncertain as well as the amounts and timing of various tax payments that are part of the settlement process. This could cause large fluctuations in the balance sheet classification of current and non-current assets and liabilities. The Company believes that in the coming 12 months , it is reasonably possible that either certain audits will conclude or the statute of limitations on certain state and foreign income and withholding taxes will expire, or both. Given the uncertainty as to ultimate settlement terms, the timing of payment and the impact of such settlements on other uncertain tax positions, the range of the estimated potential decrease in underlying unrecognized tax benefits is between $0 and $6 million . The Company and/or its subsidiaries remain subject to tax examination in the following jurisdictions: Jurisdiction Year(s) Subject to Examination United States Fiscal 2016 California Fiscal years after 2011 Hungary and Ireland Fiscal years after 2009 Japan and Taiwan Fiscal years after 2010 In addition, the Company has made acquisitions with operations in several of its significant jurisdictions which may have years subject to examination different from the years indicated in the above table. On July 27, 2015, the Tax Court issued an opinion ( Altera Corp. et al. v. Commissioner ) regarding the treatment of stock-based compensation expense in intercompany cost-sharing arrangements. The U.S. Treasury has not withdrawn the requirement to include stock-based compensation from its regulations and the IRS has initiated an appeal of the Tax Court's opinion. As the final resolution with respect to historical cost-sharing of stock-based compensation, and the potential favorable benefits to the Company, is unclear, the Company is recording no impact at this time and will continue to monitor developments related to this opinion and the potential impact of those developments on the Company's prior fiscal years. Effective February 1, 2016, the Company amended its cost- sharing arrangement to exclude stock-based compensation expense on a prospective basis and has reflected the corresponding benefits in its effective annual tax rate. In fiscal 2016, the Company early adopted ASU 2015-17, "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes", on a retrospective basis. As required by ASU 2015-17, all deferred tax assets and liabilities are classified as non-current in the Company's consolidated balance sheet, which is a change from the Company's prior period presentations whereby certain of its deferred tax assets were classified as current and the remainder were classified as non-current. Upon adoption of ASU 2015-17, current deferred tax assets of $95.0 million in the Company's October 31, 2015 consolidated balance sheet were reclassified as non-current. IRS Examinations In fiscal 2016, the Company reached final settlement with the Examination Division of the IRS for fiscal 2015 and recognized approximately $20.7 million in unrecognized tax benefits. In fiscal 2015, the Company reached final settlement with the IRS on the integration of acquired technologies for fiscal 2015 and research tax credit for fiscal 2014 that resulted in $7.0 million and $3.2 million in tax benefits, respectively. In fiscal 2014, the Company reached final settlement with the IRS on the remaining fiscal 2012 issues and recognized approximately $10.0 million in unrecognized tax benefits. The Company also reached final settlement with the IRS for its audit of fiscal 2013 and recognized approximately $5.5 million in unrecognized tax benefits. State Examinations In fiscal 2016, the Company reached final settlement with the California Franchise Tax Board for fiscal 2011, 2010, and 2009. As a result of the settlement, the Company reduced its deferred tax assets by $4.9 million , recognized $10.3 million in unrecognized tax benefits, and increased its valuation allowance by $5.4 million . Non-U.S. Examination Hungary In October 2016, the Hungarian Tax Authority (HTA) completed an audit of the Company's Hungary subsidiary (Synopsys Hungary) for fiscal years 2011 through 2013. The HTA has challenged certain of Synopsys Hungary's tax positions taken during these years, including the deduction of certain research expenses and for withholding taxes on payments made to affiliates, resulting in a proposed aggregate tax assessment of $47 million . If the assessment is ultimately upheld, Synopsys Hungary could also be liable for penalties of up to 50 percent of the tax, as well as interest. While the ultimate outcome is not certain, the Company believes there is no merit to these assessments and intends to contest them. While the appeal could take several years, we believe that we will ultimately prevail against the positions taken by the HTA. Taiwan In fiscal 2016, the Company reached final settlement with the Taiwan tax authorities for fiscal 2011, with regard to certain transfer pricing issues. As a result of the settlement, the Company paid $0.3 million of tax and recognized $0.7 million in unrecognized tax benefits. In fiscal 2015, the Company reached final settlement with the Taiwan tax authorities for fiscal 2012 with regard to certain transfer pricing issues. As a result of the settlement, the Company recognized approximately $1.1 million in unrecognized tax benefits. The Company also reached final settlement with the Taiwan tax authorities for fiscal 2013 with regard to certain transfer pricing issues. As a result of the settlement and the application of the settlement to fiscal 2014, the Company's unrecognized tax benefits decreased by $1.2 million and $1.2 million for fiscal years 2013 and 2014, respectively. In fiscal 2014, the Company reached settlements with the Taiwan tax authorities for fiscal years 2010 and 2009, with regard to certain transfer pricing issues. As a result of the settlements and the application of the settlement to other open fiscal years, the Company’s unrecognized tax benefits decreased by $5.1 million . The net tax benefit resulting from the settlements and the application to other open fiscal years was $3.9 million . India In fiscal 2016, the Company agreed to settle certain transfer pricing issues with the Indian tax authorities for various fiscal years. As a result of the settlement, the Company recognized income tax expense, net of foreign tax credits, of $4.6 million .

Other Income (Expense), Net

Other Income (Expense), Net	12 Months Ended
	Oct. 31, 2016
Other Income and Expenses [Abstract]
Other Income (Expense), Net	Other Income (Expense), Net The following table presents the components of other income (expense), net: Year Ended October 31, 2016 2015 2014 (in thousands) Interest income $ 3,715 $ 2,785 $ 1,302 Interest expense (3,771 ) (2,814 ) (1,895 ) Gain (loss) on assets related to deferred compensation plan 4,400 3,701 10,856 Foreign currency exchange gain (loss) 156 6,363 1,195 Other, net 7,653 5,109 11,967 Total $ 12,153 $ 15,144 $ 23,425

Segment Disclosure

Segment Disclosure	12 Months Ended
	Oct. 31, 2016
Segment Reporting [Abstract]
Segment Disclosure	Segment Disclosure ASC 280, Segment Reporting, requires disclosures of certain information regarding operating segments, products and services, geographic areas of operation and major customers. Segment reporting is based upon the “management approach,” i.e., how management organizes the Company’s operating segments for which separate financial information is (1) available and (2) evaluated regularly by the Chief Operating Decision Makers (CODMs) in deciding how to allocate resources and in assessing performance. Synopsys’ CODMs are the Company’s two Co-Chief Executive Officers. The Company operates in a single segment to provide software products and consulting services primarily in the EDA software industry. In making operating decisions, the CODMs primarily consider consolidated financial information, accompanied by disaggregated information about revenues by geographic region. Specifically, the CODMs consider where individual “seats” or licenses to the Company’s products are located in allocating revenue to particular geographic areas. Revenue is defined as revenues from external customers. Goodwill is not allocated since the Company operates in one reportable operating segment. Revenues and property and equipment, net, related to operations in the United States and other by geographic areas were: Year Ended October 31, 2016 2015 2014 (in thousands) Revenue: United States $ 1,205,880 $ 1,143,816 $ 1,020,654 Europe 287,381 300,352 272,911 Japan 239,964 218,794 238,588 Asia Pacific and Other 689,307 579,249 525,319 Consolidated $ 2,422,532 $ 2,242,211 $ 2,057,472 As of October 31, 2016 2015 (in thousands) Property and Equipment, net: United States $ 186,854 $ 192,075 Other countries 70,181 71,002 Total $ 257,035 $ 263,077 Geographic revenue data for multi-regional, multi-product transactions reflect internal allocations and are therefore subject to certain assumptions and to the Company’s methodology. One customer, including its subsidiaries, through multiple agreements accounted for 15.9% , 12.8% , and 10.5% of the Company’s consolidated revenue in fiscal 2016 , 2015 , and 2014 , respectively.

Effect of New Accounting Pronou

Effect of New Accounting Pronouncements	12 Months Ended
	Oct. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Effect of New Accounting Pronouncements	Effect of New Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, "Revenue from Contracts with Customers (Topic 606)," which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605).” This ASU requires an entity to recognize revenue when goods are transferred or services are provided to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. This ASU also requires disclosures enabling users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606), Deferral of the Effective Date.” With the issuance of ASU 2015-14, the new revenue guidance ASU 2014-09 will be effective for fiscal 2019, including interim periods within that reporting period, using one of two prescribed retrospective methods. In April 2016, the FASB issued ASU 2016-10, "Revenue from Contracts with Customer (Topic 606), Identifying Performance Obligations and Licensing." This ASU finalizes the amendments to the guidance on the new revenue standard on the identification of performance obligations and accounting for licenses of intellectual property. The Company is currently in the process of evaluating the impact of adoption on its consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-2, "Leases (Topic 842)," which supersedes the lease requirements in "Leases (Topic 840)." This ASU requires a lessee to recognize a right-of-use asset and a lease payment liability for most leases in the Consolidated Statement of Financial Position. This ASU also makes some changes to lessor accounting and aligns with the new revenue recognition guidance. This ASU will be effective for fiscal 2020, including interim periods within that reporting period, and earlier adoption is permitted. The Company is currently in the process of evaluating the impact of adoption on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, "Compensation-Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting." This ASU simplifies certain aspects of accounting for stock-based payment transactions, including the accounting for income taxes, provides an option to recognize gross stock-based compensation expense with actual forfeitures recognized as they occur and modifies the treatment of statutory tax withholding requirements, as well as certain classifications in the statement of cash flows. This ASU will be effective for fiscal 2018, including interim periods within that reporting period, and earlier adoption is permitted if all provisions are adopted in the same period. The Company will early adopt ASU 2016-09 in the first quarter of fiscal 2017, and the Company does not currently expect adoption to have a material impact on its consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, "Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory.” This ASU requires the immediate recognition of current and deferred income tax effects of intra-entity transfers of assets other than inventory. This ASU will be effective for fiscal 2019, including interim periods within that reporting period, and earlier adoption is permitted. The Company is currently in the process of evaluating the impact of adoption on its consolidated financial statements.

Supplementary Data - Selected U

Supplementary Data - Selected Unaudited Quarterly Financial Data	12 Months Ended
	Oct. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Supplementary Data - Selected Unaudited Quarterly Financial Data	Supplementary Data - Selected Unaudited Quarterly Financial Data The table below includes certain unaudited financial information for the last eight fiscal quarters. Refer to Note 2 of Notes to Consolidated Financial Statements for information on our fiscal year end. Quarter Ended January 31, April 30, July 31, October 31, (in thousands, except per share data) 2016 Revenue $ 568,604 $ 605,005 $ 615,204 $ 633,719 Gross margin 439,160 473,375 475,527 491,508 Income before provision for income taxes 64,342 97,223 85,231 82,752 Net income 60,035 69,376 64,718 72,697 Net income per share Basic $ 0.39 $ 0.46 $ 0.43 $ 0.48 Diluted 0.39 0.45 0.42 0.47 2015 Revenue $ 542,043 $ 557,204 $ 555,805 $ 587,159 Gross margin 417,410 432,232 426,334 447,315 Income before provision for income taxes 76,615 83,884 65,193 55,918 Net income 65,189 55,596 55,387 49,762 Net income per share Basic $ 0.42 $ 0.36 $ 0.36 $ 0.32 Diluted 0.41 0.35 0.35 0.31

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Oct. 31, 2016
Accounting Policies [Abstract]
Effect of New Accounting Pronouncements, Policy	Effect of New Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, "Revenue from Contracts with Customers (Topic 606)," which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605).” This ASU requires an entity to recognize revenue when goods are transferred or services are provided to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. This ASU also requires disclosures enabling users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606), Deferral of the Effective Date.” With the issuance of ASU 2015-14, the new revenue guidance ASU 2014-09 will be effective for fiscal 2019, including interim periods within that reporting period, using one of two prescribed retrospective methods. In April 2016, the FASB issued ASU 2016-10, "Revenue from Contracts with Customer (Topic 606), Identifying Performance Obligations and Licensing." This ASU finalizes the amendments to the guidance on the new revenue standard on the identification of performance obligations and accounting for licenses of intellectual property. The Company is currently in the process of evaluating the impact of adoption on its consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-2, "Leases (Topic 842)," which supersedes the lease requirements in "Leases (Topic 840)." This ASU requires a lessee to recognize a right-of-use asset and a lease payment liability for most leases in the Consolidated Statement of Financial Position. This ASU also makes some changes to lessor accounting and aligns with the new revenue recognition guidance. This ASU will be effective for fiscal 2020, including interim periods within that reporting period, and earlier adoption is permitted. The Company is currently in the process of evaluating the impact of adoption on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, "Compensation-Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting." This ASU simplifies certain aspects of accounting for stock-based payment transactions, including the accounting for income taxes, provides an option to recognize gross stock-based compensation expense with actual forfeitures recognized as they occur and modifies the treatment of statutory tax withholding requirements, as well as certain classifications in the statement of cash flows. This ASU will be effective for fiscal 2018, including interim periods within that reporting period, and earlier adoption is permitted if all provisions are adopted in the same period. The Company will early adopt ASU 2016-09 in the first quarter of fiscal 2017, and the Company does not currently expect adoption to have a material impact on its consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, "Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory.” This ASU requires the immediate recognition of current and deferred income tax effects of intra-entity transfers of assets other than inventory. This ASU will be effective for fiscal 2019, including interim periods within that reporting period, and earlier adoption is permitted. The Company is currently in the process of evaluating the impact of adoption on its consolidated financial statements.
Fiscal Year End	Fiscal Year End. The Company’s fiscal year ends on the Saturday nearest to October 31 and consists of 52 weeks, with the exception that approximately every five years, the Company has a 53-week year. Fiscal 2016 , 2015 , and 2014 were 52-week years ending on October 29, 2016, October 31, 2015, and November 1, 2014, respectively. For presentation purposes, the consolidated financial statements and accompanying notes refer to the closest calendar month end.
Principles of Consolidation	Principles of Consolidation. The consolidated financial statements include the accounts of the Company and all of its subsidiaries. All significant intercompany accounts and transactions have been eliminated.
Use of Estimates	Use of Estimates. To prepare financial statements in conformity with U.S. generally accepted accounting principles (U.S. GAAP), management must make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates and may result in material effects on the Company’s operating results and financial position.
Foreign Currency Translation	Foreign Currency Translation. The functional currency of the majority of the Company’s active foreign subsidiaries is the foreign subsidiary’s local currency. Assets and liabilities that are not denominated in the functional currency are remeasured into the functional currency with any related gain or loss recorded in earnings. The Company translates assets and liabilities of its non-U.S. dollar functional currency foreign operations into the U.S. dollar reporting currency at exchange rates in effect at the balance sheet date. The Company translates income and expense items of such foreign operations into U.S. dollars reporting currency at average exchange rates for the period. Accumulated translation adjustments are reported in stockholders’ equity, as a component of accumulated other comprehensive income (loss).
Foreign Currency Contracts	Foreign Currency Contracts. The Company operates internationally and is exposed to potentially adverse movements in currency exchange rates. The Company enters into hedges in the form of foreign currency forward contracts to reduce its exposure to foreign currency rate changes on non-functional currency denominated forecasted transactions and balance sheet positions. The assets or liabilities associated with the forward contracts are recorded at fair value in other current assets or accrued liabilities in the consolidated balance sheet. The accounting for gains and losses resulting from changes in fair value depends on the use of the foreign currency forward contract and whether it is designated and qualifies for hedge accounting. See Note 5. Financial Assets and Liabilities .
Fair Values of Financial Instruments	Fair Values of Financial Instruments. The Company’s cash equivalents, short-term investments and foreign currency contracts are carried at fair value. The fair value of the Company’s accounts receivable and accounts payable approximates the carrying amount due to their short duration. Non-marketable equity securities are carried at cost, net of impairments. The Company performs periodic impairment analysis over these non-marketable equity securities. The carrying amount of the short-term debt approximates the estimated fair value. See Note 6. Fair Value Measures .
Cash, Cash Equivalents and Short-term Investments	Cash, Cash Equivalents and Short-term Investments . The Company classifies investments with original maturities of three months or less when acquired as cash equivalents. All of the Company’s short-term investments are classified as available-for-sale and are reported at fair value, with unrealized gains and losses included in stockholders’ equity as a component of accumulated other comprehensive income (loss), net of tax. Those unrealized gains or losses deemed other than temporary are reflected in other income (expense), net. The cost of securities sold is based on the specific identification method and realized gains and losses are included in other income (expense), net. See Note 5. Financial Assets and Liabilities.
Concentration of Credit Risk	Concentration of Credit Risk . Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash equivalents, marketable securities, foreign currency contracts, and accounts receivable from trade customers. The Company maintains cash equivalents primarily in highly rated taxable and tax-exempt money market funds located in the U.S. and in various overseas locations. The Company sells its products worldwide primarily to customers in the global electronics market. The Company performs on-going credit evaluations of its customers’ financial condition and does not require collateral. The Company establishes reserves for potential credit losses and such losses have been within management’s expectations and have not been material in any year presented.
Accounts Receivable, net and Allowance for Doubtful Accounts	Accounts Receivable, Net. The balances consist of accounts receivable billed and unbilled. Unbilled accounts receivable represent amounts recorded as revenue which will be invoiced within one year of the balance sheet date. The following table represents the components of accounts receivable, net: October 31, 2016 2015 (in thousands) Accounts receivable $ 394,314 $ 354,688 Unbilled accounts receivable 47,760 33,567 Total accounts receivable 442,074 388,255 Less allowance for doubtful accounts (3,201 ) (2,561 ) Total accounts receivable, net $ 438,873 $ 385,694 Allowance for Doubtful Accounts. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for doubtful accounts to reduce the Company’s receivables to their estimated net realizable value. The Company provides a general reserve on all accounts receivable based on a review of customer accounts. The following table presents the changes in the allowance for doubtful accounts: Fiscal Year Balance at Beginning of Period Provisions Write-offs(1) Balance at End of Period (in thousands) 2016 $ 2,561 $ 950 $ (310 ) $ 3,201 2015 $ 2,026 $ 1,300 $ (765 ) $ 2,561 2014 $ 4,253 $ (1,250 ) $ (977 ) $ 2,026 (1) Balances written off, net of recoveries.
Income Taxes	Income Taxes. The Company accounts for income taxes using the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company accounts for uncertainty in income taxes using a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining whether it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount which is more than 50% likely of being realized upon ultimate settlement. An uncertain tax position is considered effectively settled on completion of an examination by a taxing authority if certain other conditions are satisfied.
Property and Equipment	Property and Equipment. Property and equipment is recorded at cost less accumulated depreciation. Assets, excluding land, are depreciated using the straight-line method over their estimated useful lives. Leasehold improvements are amortized using the straight-line method over the remaining term of the lease or the economic useful life of the asset, whichever is shorter. Depreciation expenses were $73.8 million , $71.1 million and $63.1 million in fiscal 2016 , 2015 and 2014 , respectively. Repair and maintenance costs are expensed as incurred and such costs were $38.8 million , $32.3 million and $28.7 million in fiscal 2016 , 2015 and 2014 , respectively. A summary of property and equipment, at cost less accumulated depreciation and amortization, as of October 31, 2016 and 2015 is as follows: October 31, 2016 2015 (in thousands) Computer and other equipment $ 486,109 $ 436,425 Buildings 68,194 67,943 Furniture and fixtures 51,589 50,075 Land 20,414 20,414 Leasehold improvements 136,773 142,275 763,079 717,132 Less accumulated depreciation and amortization(1) (506,044 ) (454,055 ) Total $ 257,035 $ 263,077 (1) Accumulated depreciation and amortization includes write-offs due to retirement of fully amortized fixed assets. The useful lives of depreciable assets are as follows: Useful Life in Years Computer and other equipment 3-5 Buildings 30 Furniture and fixtures 5 Leasehold improvements (average) 5
Goodwill	Goodwill. Goodwill represents the excess of the aggregate purchase price over the fair value of the net tangible and identifiable intangible assets acquired by the Company. The carrying amount of goodwill is tested for impairment annually as of October 31 or more frequently if facts and circumstances warrant a review. The Company determined that it is a single reporting unit for the purpose of goodwill impairment tests. For purposes of assessing the impairment of goodwill, the Company estimates the value of the reporting unit using its market capitalization as the best evidence of fair value. This fair value is then compared to the carrying value of the reporting unit. During fiscal 2016 , 2015 and 2014 , there were no indicators of impairment to goodwill.
Intangible Assets	Intangible Assets. Intangible assets consist of acquired technology, certain contract rights, customer relationships, trademarks and trade names, covenants not to compete, capitalized software, and in-process research and development. These intangible assets are either acquired through business combinations, direct purchases, or internally developed capitalized software. Intangible assets are amortized on a straight-line basis over their estimated useful lives which range from one to ten years. The Company continually monitors events and changes in circumstances that could indicate carrying amounts of long-lived assets, including property and equipment and intangible assets, may not be recoverable. When such events or changes in circumstances occur, the Company assesses the recoverability of long-lived assets by determining whether the carrying value of such asset group will be recovered through the undiscounted future cash flow. If the undiscounted future cash flow is less than the carrying amount of the asset group, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the asset group. The Company had no impairments of any long-lived assets in fiscal 2016 , 2015 or 2014 .
Restructuring Charges	Restructuring Charges. During fiscal 2016, the Company recorded $9.6 million of restructuring charges for severance and benefits due to involuntary employee terminations, of which $3.9 million was paid in fiscal 2016. As of October 31, 2016, there was a $5.7 million outstanding balance remaining in accounts payable and accrued liabilities as payroll and related benefits in the consolidated balance sheets. The remaining balance will be paid in fiscal 2017. During fiscal 2015, the Company recorded $15.1 million of restructuring charges, pursuant to the fiscal 2015 restructuring program, which included a voluntary retirement program (VRP) and a minimal headcount reduction program. As of October 31, 2015, there was no outstanding balance in restructuring charges.
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss). Other comprehensive income (loss) (OCI) includes all changes in equity during a period, such as accumulated net translation adjustments, unrealized gain (loss) on certain foreign currency forward contracts that qualify as cash flow hedges, reclassification adjustments related to cash flow hedges and unrealized gain (loss) on investments. See Note 8 . Accumulated Other Comprehensive Income (Loss) .
Revenue Recognition	Revenue Recognition. The Company generates revenue from the sale of products that include software licenses, maintenance and professional services and to a lesser extent, hardware products. Software license revenue consists of fees associated with the licensing of the Company's software. Maintenance and professional service revenue consists of maintenance fees associated with perpetual and term licenses and professional services fees. Hardware revenue consists of sales of Field Programmable Gate Array (FPGA)-based emulation and prototyping products. Most of the Company's customer arrangements are complex, involving hundreds of products and various license rights, bundled with post-contract customer support and additional meaningful rights that provide a complete end-to-end solution to the customer. Throughout the contract, the Company's customers are typically using a myriad of products to complete each phase of a chip design and are concurrently working on multiple chip designs, or projects, in different phases of the design. During this time, the customer looks to the Company to release state-of-the-art technology as the Company keeps up with the pace of change, to address requested enhancements to the Company's tools to meet customer specifications, to provide support at each stage of the customer’s design, including the final manufacturing of the chip (the tape out stage), and other important services. With respect to software licenses, the Company utilizes three license types: • Technology Subscription Licenses (TSLs). TSLs are time-based licenses for a finite term, and generally provide the customer limited rights to receive, or to exchange certain quantities of licensed software for, unspecified future technology. The majority of the Company's arrangements are TSLs due to the nature of the business and customer requirements. In addition to the licenses, the arrangements also include: post-contract customer support, which includes providing frequent updates and upgrades to maintain the utility of the software due to rapid changes in technology; other intertwined services such as multiple copies of the tools; assisting the Company's customers in applying the Company's technology in their development environment; and rights to remix licenses for other licenses. • Term licenses. The Company also infrequently enters into certain license arrangements wherein licenses are provided for a finite term without any other services or rights, including rights to receive, or to exchange licensed software for, unspecified future technology. Customers purchase maintenance separately for the first year and may renew annually for the balance of the term. The annual maintenance fee is typically calculated as a percentage of the net license fee. • Perpetual licenses. Perpetual licenses continue as long as the customer renews maintenance plus an additional 20 years. Perpetual licenses do not provide the customer any rights to receive, or to exchange licensed software for, unspecified future technology. Customers purchase maintenance separately for the first year and may renew annually. For the three software license types, the Company recognizes revenue as follows: • TSLs. The Company typically recognizes revenue from TSL fees ratably over the term of the license period, or as customer installments become due and payable, whichever is later. Revenue attributable to TSLs is reported as “time-based products revenue” in the consolidated statements of operations. • Term licenses. The Company recognizes revenue from term licenses in full upon shipment of the software if payment terms require the customer to pay at least 75% of the license fee and 100% of the maintenance fee within one year from shipment and all other revenue recognition criteria are met. Revenue attributable to these term licenses is reported as “upfront products revenue” in the consolidated statements of operations. For term licenses in which less than 75% of the license fee and 100% of the maintenance fee is payable within one year from shipment, the Company recognizes revenue as customer payments become due and payable. Such revenue is reported as “time-based products revenue” in the consolidated statements of operations. • Perpetual licenses. The Company recognizes revenue from perpetual licenses in full upon shipment of the software if payment terms require the customer to pay at least 75% of the license fee and 100% of the maintenance fee within one year from shipment and all other revenue recognition criteria are met. Revenue attributable to these perpetual licenses is reported as “upfront products revenue” in the consolidated statements of operations. For perpetual licenses in which less than 75% of the license fee and 100% of the maintenance fee is payable within one year from shipment, the Company recognizes revenue as customer installments become due and payable. Such revenue is reported as “time-based products revenue” in the consolidated statements of operations. The Company's maintenance and service revenue consists of maintenance fees associated with perpetual and term software licenses and professional services fees. The Company recognizes revenue from maintenance arrangements ratably over the maintenance period to the extent cash has been received or fees become due and payable, and recognize revenue from professional services and training fees as such services are performed and accepted by the customer. Revenue attributable to maintenance, professional services and training is reported as “maintenance and service revenue” in the consolidated statements of operations. Hardware revenue consists of sales of FPGA-based emulation and prototyping products. The Company recognizes revenue from sales of hardware products in full upon shipment if all other revenue recognition criteria are met. Revenue attributable to these sales is reported as “upfront products revenue” in the consolidated statements of operations and is not material to the Company's total revenue. The Company also enters into arrangements in which portions of revenue are contingent upon the occurrence of uncertain future events, for example, royalty arrangements. The Company refers to this revenue as “contingent revenue.” Contingent revenue is recognized if and when the event that removes the contingency occurs. Such revenue is reported as “time-based products revenue” in the consolidated statements of operations. These arrangements are not material to the Company’s total revenue. The Company infrequently enters into multiple-element arrangements that contain both software and non-software deliverables such as hardware. The Company has determined that the software and non-software deliverables in the Company’s contracts are separate units of accounting. The Company recognizes revenue for the separate units of accounting when all revenue recognition criteria are met. Revenue allocated to hardware units of accounting is recognized upon shipment when all other revenue recognition criteria are met. Revenue allocated to software units of accounting is recognized depending on the software license type (TSL, term license or perpetual license). Such arrangements have not had a material effect on the Company’s consolidated financial statements and are not expected to have a material effect in future periods. The Company also enters into arrangements to deliver software products, either alone or together with other products or services that require significant modification, or customization of the software. The Company accounts for such arrangements using the percentage of completion method as the Company has the ability to make reasonably dependable estimates that relate to the extent of progress toward completion, contract revenues and costs. The Company measures the progress towards completion using the labor hours incurred to complete the project. Revenue attributable to these arrangements is reported as “maintenance and service revenue” in the consolidated statements of operations. The Company determines the fair value of each element in multiple element software arrangements that only contain software and software-related deliverables based on vendor-specific objective evidence (VSOE). The Company limits assessment of VSOE of fair value for each element to the price charged when such element is sold separately. The Company has analyzed all of the elements included in multiple-element software arrangements and has determined that the Company has sufficient VSOE to allocate revenue to the maintenance components of the Company’s perpetual and term license products and to professional services. Accordingly, assuming all other revenue recognition criteria are met, the Company recognizes license revenue from perpetual and term licenses upon delivery using the residual method, recognizes revenue from maintenance ratably over the maintenance term, and recognizes revenue from professional services as services are performed and accepted by the customer. With respect to TSL arrangements, due to the complexity of the tools, the complexity of the arrangement terms and intertwined services, the license, maintenance and other services are not separable and are considered as a combined unit. Additionally, the Company does not have sufficient VSOE of fair value to allocate the fee between these services. Therefore, we recognize revenue from TSLs ratably over the term of the license, assuming all other revenue recognition criteria are met The Company makes judgments related to revenue recognition. Specifically, in connection with each transaction involving the Company’s products, the Company must evaluate whether: (1) persuasive evidence of an arrangement exists, (2) delivery of software or services has occurred, (3) the fee for such software or services is fixed or determinable, and (4) collectability is probable. All four of these criteria must be met in order for the Company to recognize revenue with respect to a particular arrangement. The Company applies these revenue recognition criteria as follows: • Persuasive Evidence of an Arrangement Exists. Prior to recognizing revenue on an arrangement, the Company’s customary policy is to have a written contract, signed by both the customer and by the Company or a purchase order from those customers that have previously negotiated a standard end-user license arrangement or purchase agreement. • Delivery Has Occurred. The Company delivers its products to its customers electronically or physically. For electronic deliveries, delivery occurs when the Company provides access to its customers to take immediate possession of the software through downloading it to the customer’s hardware. For physical deliveries, the standard transfer terms are typically Freight on Board (FOB) shipping point. The Company generally ships its products or license keys promptly after acceptance of customer orders. However, a number of factors can affect the timing of product shipments and, as a result, timing of revenue recognition, including the delivery dates requested by customers and the Company's operational capacity to fulfill product orders at the end of a fiscal quarter. • The Fee is Fixed or Determinable. The Company’s determination that an arrangement fee is fixed or determinable depends principally on the arrangement’s payment terms. The Company’s standard payment terms for perpetual and term licenses require 75% or more of the license fee and 100% of the maintenance fee to be paid within one year. If the arrangement includes these terms, the Company regards the fee as fixed or determinable, and recognizes all license revenue under the arrangement in full upon delivery (assuming all other revenue recognition criteria are met). If the arrangement does not include these terms, the Company does not consider the fee to be fixed or determinable and generally recognizes revenue when customer installments are due and payable. In the case of a TSL, because of the right to exchange products or receive unspecified future technology and because VSOE for maintenance services does not exist for a TSL, the Company recognizes revenue ratably over the term of the license, but not in advance of when customers’ installments become due and payable. • Collectability is Probable. The Company judges collectability of the arrangement fees on a customer-by-customer basis pursuant to its credit review policy. The Company typically sells to customers with whom it has a history of successful collection. For a new customer, or when an existing customer substantially expands its commitments, the Company evaluates the customer’s financial position and ability to pay and typically assigns a credit limit based on that review. The Company increases the credit limit only after it has established a successful collection history with the customer. If the Company determines at any time that collectability is not probable under a particular arrangement based upon its credit review process or the customer’s payment history, the Company recognizes revenue under that arrangement as customer payments are actually receive
Warranties and Indemnities	. Warranties and Indemnities. The Company generally warrants its products to be free from defects in media and to substantially conform to material specifications for a period of 90 days for software products and for up to six months for hardware systems. In certain cases, the Company also provides its customers with limited indemnification with respect to claims that their use of the Company’s software products infringes on United States patents, copyrights, trademarks or trade secrets. The Company is unable to estimate the potential impact of these commitments on the future results of operations. To date, the Company has not been required to pay any material warranty claim
Net Income Per Share	. Net Income Per Share. The Company computes basic income per share by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted net income per share reflects the dilution from potential common shares outstanding such as stock options and unvested restricted stock units and awards during the period using the treasury stock method. The table below reconciles the weighted average common shares used to calculate basic net income per share with the weighted average common shares used to calculate diluted net income per share: Year Ended October 31, 2016 2015 2014 (in thousands) Numerator: Net income $ 266,826 $ 225,934 $ 259,124 Denominator: Weighted average common shares for basic net income per share 152,017 154,957 155,054 Dilutive effect of common share equivalents from equity—based compensation 2,704 3,108 2,656 Weighted average common shares for diluted net income per share 154,721 158,065 157,710 Net income per share: Basic $ 1.76 $ 1.46 $ 1.67 Diluted $ 1.73 $ 1.43 $ 1.64 Anti-dilutive employee stock-based awards excluded(1) 1,971 1,363 2,196 (1) These stock options and unvested restricted stock units were anti-dilutive for the respective periods and are excluded in calculating diluted net income per share. While such awards were anti-dilutive for the respective periods, they could be dilutive in the future.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Oct. 31, 2016
Accounting Policies [Abstract]
Schedule of Accounts Receivable, net	The following table represents the components of accounts receivable, net: October 31, 2016 2015 (in thousands) Accounts receivable $ 394,314 $ 354,688 Unbilled accounts receivable 47,760 33,567 Total accounts receivable 442,074 388,255 Less allowance for doubtful accounts (3,201 ) (2,561 ) Total accounts receivable, net $ 438,873 $ 385,694
Changes in Allowance for Doubtful Accounts	The following table presents the changes in the allowance for doubtful accounts: Fiscal Year Balance at Beginning of Period Provisions Write-offs(1) Balance at End of Period (in thousands) 2016 $ 2,561 $ 950 $ (310 ) $ 3,201 2015 $ 2,026 $ 1,300 $ (765 ) $ 2,561 2014 $ 4,253 $ (1,250 ) $ (977 ) $ 2,026 (1) Balances written off, net of recoveries.
Components of Property and Equipment	A summary of property and equipment, at cost less accumulated depreciation and amortization, as of October 31, 2016 and 2015 is as follows: October 31, 2016 2015 (in thousands) Computer and other equipment $ 486,109 $ 436,425 Buildings 68,194 67,943 Furniture and fixtures 51,589 50,075 Land 20,414 20,414 Leasehold improvements 136,773 142,275 763,079 717,132 Less accumulated depreciation and amortization(1) (506,044 ) (454,055 ) Total $ 257,035 $ 263,077 (1) Accumulated depreciation and amortization includes write-offs due to retirement of fully amortized fixed assets.
Useful Lives of Depreciable Assets	The useful lives of depreciable assets are as follows: Useful Life in Years Computer and other equipment 3-5 Buildings 30 Furniture and fixtures 5 Leasehold improvements (average) 5
Components of Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities. The balance consists of: October 31, 2016 2015 (in thousands) Payroll and related benefits $ 321,430 $ 315,078 Other accrued liabilities 66,276 60,545 Accounts payable 13,745 9,919 Total $ 401,451 $ 385,542
Components of Other Long Term Liabilities	Other Long-term Liabilities. The balance consists of: October 31, 2016 2015 (in thousands) Deferred compensation liability (See Note 10 ) $ 163,185 $ 158,462 Other long-term liabilities 47,670 43,559 Total $ 210,855 $ 202,021
Reconciliation of Weighted Average Common Shares Used to Calculate Basic Net Income Per Share	The table below reconciles the weighted average common shares used to calculate basic net income per share with the weighted average common shares used to calculate diluted net income per share: Year Ended October 31, 2016 2015 2014 (in thousands) Numerator: Net income $ 266,826 $ 225,934 $ 259,124 Denominator: Weighted average common shares for basic net income per share 152,017 154,957 155,054 Dilutive effect of common share equivalents from equity—based compensation 2,704 3,108 2,656 Weighted average common shares for diluted net income per share 154,721 158,065 157,710 Net income per share: Basic $ 1.76 $ 1.46 $ 1.67 Diluted $ 1.73 $ 1.43 $ 1.64 Anti-dilutive employee stock-based awards excluded(1) 1,971 1,363 2,196 (1) These stock options and unvested restricted stock units were anti-dilutive for the respective periods and are excluded in calculating diluted net income per share. While such awards were anti-dilutive for the respective periods, they could be dilutive in the futur

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Oct. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill	Goodwill: (in thousands) Balance at October 31, 2014 $ 2,255,708 Additions 233,989 Adjustments 684 Effect of foreign currency translation (19,140 ) Balance at October 31, 2015 $ 2,471,241 Additions 39,172 Adjustments 435 Effect of foreign currency translation 7,397 Balance at October 31, 2016(1) $ 2,518,245 (1) There is no accumulated impairment of goodwill for periods presented.
Summary of Intangible Assets	Intangible assets as of October 31, 2016 consist of the following: Gross Assets Accumulated Amortization Net Assets (in thousands) Core/developed technology $ 610,812 $ 460,722 $ 150,090 Customer relationships 235,997 139,932 96,065 Contract rights intangible 171,248 162,183 9,065 Trademarks and trade names 20,729 13,821 6,908 Capitalized software development costs 29,642 25,109 4,533 Total $ 1,068,428 $ 801,767 $ 266,661 Intangible assets as of October 31, 2015 consist of the following: Gross Assets Accumulated Amortization Net Assets (in thousands) Core/developed technology $ 584,293 $ 375,395 $ 208,898 Customer relationships 231,908 115,170 116,738 Contract rights intangible 168,153 144,293 23,860 Trademarks and trade names 20,729 10,665 10,064 Capitalized software development costs 25,511 21,412 4,099 Total $ 1,030,594 $ 666,935 $ 363,659
Amortization Expense Related to Intangible Assets	Amortization expense related to intangible assets consisted of the following: Year Ended October 31, 2016 2015 2014 (in thousands) Core/developed technology $ 85,331 $ 76,674 $ 70,675 Customer relationships 24,594 23,104 22,470 Contract rights intangible 16,543 33,350 30,665 Trademarks and trade names 3,156 2,900 2,309 Capitalized software development costs(1) 3,697 3,653 3,581 Total $ 133,321 $ 139,681 $ 129,700 (1) Amortization of capitalized software development costs is included in cost of products revenue in the consolidated statements of operations.
Estimated Future Amortization of Intangible Assets	The following table presents the estimated future amortization of intangible assets: Fiscal Year (in thousands) 2017 $ 97,109 2018 71,091 2019 46,551 2020 31,683 2021 14,865 2022 and thereafter 5,362 Total $ 266,661

Financial Assets and Liabilit27

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 Gross Gross Estimated (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 Gross Gross Estimated (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.

Fair Value Measures (Tables)

Fair Value Measures (Tables)	12 Months Ended
	Oct. 31, 2016
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below as of October 31, 2016 : Fair Value Measurement Using Description Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Assets Cash equivalents: Money market funds $ 499,274 $ 499,274 $ — $ — Commercial paper 1,498 — 1,498 — Certificates of deposit 4,200 — 4,200 — Short-term investments: U.S. government agency securities 13,603 — 13,603 — Certificates of deposit 12,849 — 12,849 — Commercial paper 25,431 — 25,431 — Corporate debt securities 58,778 — 58,778 — Asset-backed securities 22,146 — 22,146 — Non-U.S. government agency securities 3,400 — 3,400 — Other 4,488 4,488 — — Prepaid and other current assets: Foreign currency derivative contracts 4,652 — 4,652 — Other long-term assets: Deferred compensation plan assets 163,185 163,185 — — Total assets $ 813,504 $ 666,947 $ 146,557 $ — Liabilities Accounts payable and accrued liabilities: Foreign currency derivative contracts $ 20,010 $ — $ 20,010 $ — Other long-term liabilities: Deferred compensation plan liabilities 163,185 163,185 — — Total liabilities $ 183,195 $ 163,185 $ 20,010 $ — Assets and liabilities measured at fair value on a recurring basis are summarized below as of October 31, 2015 : Description Total Fair Value Measurement Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Assets 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 299 — 299 — Short-term investments: U.S. government agency securities 12,614 — 12,614 — Municipal bonds 1,403 — 1,403 — Certificates of deposit 9,800 — 9,800 — Commercial paper 12,129 — 12,129 — Corporate debt securities 67,188 — 67,188 — Asset-backed securities 24,608 — 24,608 — Non-U.S. government agency securities 1,005 — 1,005 — Prepaid and other current assets: Foreign currency derivative contracts 6,462 — 6,462 — Other long-term assets: Deferred compensation plan assets 158,462 158,462 — — Total assets $ 533,143 $ 392,301 $ 140,842 $ — Liabilities Accounts payable and accrued liabilities: Foreign currency derivative contracts $ 10,281 $ — $ 10,281 $ — Other long-term liabilities: Deferred compensation plan liabilities 158,462 158,462 — — Total liabilities $ 168,743 $ 158,462 $ 10,281 $ —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Oct. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Minimum Lease Commitments	As of October 31, 2016 , anticipated future minimum lease payments on all non-cancellable operating leases with a term in excess of one year, net of sublease income are as follows: Minimum Lease Payments Sublease Income Net (in thousands) Fiscal Year 2017 $ 52,373 $ 2,141 $ 50,232 2018 50,938 2,173 48,765 2019 46,506 2,179 44,327 2020 35,835 2,239 33,596 2021 28,801 2,184 26,617 Thereafter 171,040 2,247 168,793 Total $ 385,493 $ 13,163 $ 372,330

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Oct. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	Components of accumulated other comprehensive income (loss), on an after-tax basis where applicable, were as follows: Year Ended October 31, 2016 2015 (in thousands) Cumulative currency translation adjustments $ (84,700 ) $ (90,508 ) Unrealized gain (loss) on derivative instruments, net of taxes (19,896 ) (14,839 ) Unrealized gain (loss) on available-for-sale securities, net of taxes 19 (28 ) Total accumulated other comprehensive income (loss) $ (104,577 ) $ (105,375 )
Effect of Amounts Reclassified out of Each Component of Accumulated Other Comprehensive Income (Loss) into Net Income	The effect of amounts reclassified out of each component of accumulated other comprehensive income (loss) into net income was as follows: Year Ended October 31, 2016 2015 2014 (in thousands) Reclassifications from accumulated other comprehensive income (loss) into consolidated statement of operations: Gain (loss) on cash flow hedges, net of taxes Revenues $ (8,585 ) $ 9,270 $ 2,339 Operating expenses (12,125 ) (24,193 ) 1,543 Gain (loss) on available-for-sale securities Other income (expense) 18 41 — Total reclassifications into net income $ (20,692 ) $ (14,882 ) $ 3,882

Stock Repurchase Program (Table

Stock Repurchase Program (Tables)	12 Months Ended
	Oct. 31, 2016
Stock Repurchase Program [Abstract]
Stock Repurchase And Reissuance Activities	The following table summarizes stock repurchase activities as well as the reissuance of treasury stock for employee stock compensation purposes: Year Ended October 31, 2016 2015 2014 (in thousands, except per share price) Shares repurchased 8,506 5,672 3,092 Average purchase price per share $ 49.37 $ 45.84 $ 38.72 Aggregate purchase price $ 420,000 $ 260,000 $ 119,747 Reissuance of treasury stock 4,803 4,864 4,888

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Oct. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Restricted Stock Units	The following table contains information concerning activities related to restricted stock units: Restricted Stock Units Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Life (In Years) Aggregate Fair Value (in thousands, except per share and life amounts) Balance at October 31, 2013 3,983 $ 31.23 1.51 Granted 1,645 $ 39.03 Vested(1) (1,564 ) $ 29.07 $ 60,815 Forfeited (117 ) $ 32.95 Balance at October 31, 2014 3,947 $ 35.29 1.53 Granted 1,707 $ 48.13 Vested(1) (1,522 ) $ 33.05 $ 73,677 Forfeited (204 ) $ 37.68 Balance at October 31, 2015 3,928 $ 41.61 1.54 Granted 1,765 $ 49.59 Vested(1) (1,547 ) $ 38.33 $ 79,558 Forfeited (111 ) $ 43.12 Balance at October 31, 2016 4,035 $ 46.37 1.56 (1) The number of vested restricted stock units includes shares that were withheld on behalf of employees to satisfy the minimum statutory tax withholding requirements.
Stock Options and Restricted Stock Units Under all Equity Plans (Except 2005 Directors Plan)	The following table contains additional information concerning activities related to stock options and restricted stock units under all equity plans, other than shares available for grant under the 2005 Directors Plan: Available for Grant(3) Options(2) Options Outstanding Weighted- Average Exercise Price per Share Weighted- Average Remaining Contractual Life (In Years) Aggregate Intrinsic Value (in thousands, except per share and life amounts) Balance at October 31, 2013 8,472 7,726 $ 26.87 4.30 $ 71,700 Options Granted (1,686 ) 1,686 $ 38.65 Options Assumed(2) 843 $ 24.63 Options Exercised (2,103 ) $ 24.47 Options Canceled/forfeited/expired 163 (402 ) $ 27.44 Restricted stock units granted(1) (2,468 ) Restricted stock units forfeited(1) 174 Additional shares reserved 7,500 Balance at October 31, 2014 12,155 7,750 $ 29.81 4.66 $ 86,537 Options Granted (1,908 ) 1,942 $ 45.14 Options Assumed(2) 133 $ 38.97 Options Exercised (2,125 ) $ 26.06 Options Canceled/forfeited/expired 230 (411 ) $ 33.51 Restricted stock units granted(1) (2,707 ) Restricted stock units forfeited(1) 313 Additional shares reserved 3,800 Balance at October 31, 2015 11,883 7,289 $ 34.94 4.67 $ 109,627 Options Granted (1,685 ) 1,685 $ 47.39 Options Exercised (2,154 ) $ 30.06 Options Canceled/forfeited/expired 33 (65 ) $ 35.31 Restricted stock units granted(1) (2,967 ) Restricted stock units forfeited(1) 180 Additional shares reserved 3,800 Balance at October 31, 2016 11,244 6,755 $ 39.59 4.65 $ 126,850 Vested and expected to vest as of October 31, 2016 6,641 $ 39.48 4.63 $ 125,429 Exercisable at October 31, 2016 3,282 $ 34.46 3.67 $ 78,478 (1) These amounts do not reflect the actual number of restricted stock units granted or forfeited but rather the effect on the total remaining shares available for future grants after the application of the share reserve ratio. For more information about the share reserve ratio, please see Restricted Stock Units above. (2) The Company assumed options outstanding under various plans through acquisitions. (3) Excluding shares reserved for future issuance under the 2005 Directors Plan.
Pretax Intrinsic Value of Options Exercised and Their Average Exercise Prices	The pretax intrinsic value of options exercised and their average exercise prices were: Year Ended October 31, 2016 2015 2014 (in thousands, except per share price) Intrinsic value $ 51,408 $ 44,104 $ 32,094 Average exercise price per share $ 30.06 $ 26.06 $ 24.47
Summary of Restricted Stock Award Activities Under 2005 Directors Plan	Restricted stock award activities during fiscal 2016 under the 2005 Directors Plan are summarized as follows: Restricted Shares Weighted-Average Grant Date Fair Value (in thousands, except per share) Unvested at October 31, 2015 45 $ 41.82 Granted 21 $ 48.27 Vested (23 ) $ 39.94 Forfeited — $ — Unvested at October 31, 2016 43 $ 45.97
Stock Option Plans and Stock Purchase Rights Granted Under ESPP	The assumptions presented in the following table were used to estimate the fair value of stock options and employee stock purchase rights granted under the Company’s stock plans or stock plans assumed from acquisitions: Year Ended October 31, 2016 2015 2014 Stock Options Expected life (in years) 4.1 4.3 4.5 Risk-free interest rate 1.06% - 1.63% 1.24% - 1.58% 1.38% - 1.74% Volatility 19.21%-21.62% 16.92%-21.76% 18.38%-20.00% Weighted average estimated fair value $8.97 $8.77 $10.95 ESPP Expected life (in years) 0.5 - 2.0 0.5 - 2.0 0.5 - 2.0 Risk-free interest rate 0.53% - 0.86% 0.12% - 0.75% 0.05% - 0.58% Volatility 17.03% - 25.46% 18.01% - 21.60% 16.84% - 18.78% Weighted average estimated fair value $12.75 $11.11 $9.17
Stock Compensation Expense	The following table presents stock compensation expense for fiscal 2016 , 2015 and 2014 , respectively: Year Ended October 31, 2016 2015 2014 (in thousands) Cost of products $ 11,006 $ 9,162 $ 8,122 Cost of maintenance and service 2,418 2,164 2,336 Research and development expense 49,511 43,431 38,241 Sales and marketing expense 19,690 17,744 16,754 General and administrative expense 14,958 13,899 13,987 Stock compensation expense before taxes 97,583 86,400 79,440 Income tax benefit (25,967 ) (20,071 ) (18,224 ) Stock compensation expense after taxes $ 71,616 $ 66,329 $ 61,216
Deferred Plan Assets and Liabilities	Deferred Plan Assets and Liabilities are as follows: As of October 31, 2016 As of October 31, 2015 (In thousands) Plan assets recorded in other long-term assets $ 163,185 $ 158,462 Plan liabilities recorded in other long-term liabilities(1) $ 163,185 $ 158,462 (1) Undistributed deferred compensation balances due to participants.
Summary of Impact of Deferred Plan	The following table summarizes the impact of the Deferred Plan: Year Ended October 31, 2016 2015 2014 (in thousands) Increase (reduction) to cost of revenue and operating expense $ 4,400 $ 3,701 $ 10,856 Other income (expense), net 4,400 3,701 10,856 Net increase (decrease) to net income $ — $ — $ —

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Oct. 31, 2016
Income Tax Disclosure [Abstract]
Domestic and Foreign Components of Total Income Before Provision for Income Tax	The domestic and foreign components of the Company’s total income (loss) before provision for income taxes are as follows: Year Ended October 31, 2016 2015 2014 (in thousands) United States $ 22,134 $ 42,571 $ (7,638 ) Foreign 307,414 239,039 279,780 Total income (loss) before provision for income taxes $ 329,548 $ 281,610 $ 272,142
Components of (Benefit) Provision for Income Taxes	The components of the (benefit) provision for income taxes were as follows: Year Ended October 31, 2016 2015 2014 (in thousands) Current: Federal $ (6,106 ) $ (21,911 ) $ (14,951 ) State 2,670 1,385 279 Foreign 80,195 39,319 42,085 76,759 18,793 27,413 Deferred: Federal (23,510 ) 44,462 (4,612 ) State 11,950 (2,282 ) (4,141 ) Foreign (2,477 ) (5,297 ) (5,642 ) (14,037 ) 36,883 (14,395 ) Provision (benefit) for income taxes $ 62,722 $ 55,676 $ 13,018
Rate Reconciliation Between Provision for Income Taxes and Taxes Computed at Statutory Federal Rate	The provision (benefit) for income taxes differs from the taxes computed with the statutory federal income tax rate as follows: Year Ended October 31, 2016 2015 2014 (in thousands) Statutory federal tax $ 115,343 $ 98,564 $ 95,251 State tax (benefit), net of federal effect (1) 11,015 (4,764 ) (4,306 ) Tax credits (2) (36,979 ) (13,301 ) (5,153 ) Tax on foreign earnings less than U.S. statutory tax (68,246 ) (56,536 ) (61,376 ) Tax settlements (16,479 ) (6,251 ) (19,645 ) Stock based compensation 5,709 5,406 5,675 Changes in valuation allowance 428 (216 ) (235 ) Federal statute lapses — (2,265 ) (6,746 ) Integration of acquired technologies 37,525 33,015 4,715 Undistributed earnings of foreign subsidiaries 9,595 — — Other 4,811 2,024 4,838 Provision (benefit) for income taxes $ 62,722 $ 55,676 $ 13,018 (1) State tax (benefit), net of federal effect, includes changes in valuation allowance of $25.1 million , $2.4 million and $1.9 million for fiscal years 2016, 2015 and 2014, respectively. (2) Tax credits include benefits from the retroactive reinstatement of the U.S. federal research tax credit.
Components of Deferred Tax Assets and Liabilities	The significant components of deferred tax assets and liabilities were as follows: October 31, 2016 2015 (in thousands) Net deferred tax assets: Deferred tax assets: Accruals and reserves $ 34,324 $ 40,373 Deferred revenue 42,497 36,460 Deferred compensation 64,321 69,716 Capitalized costs 54,123 60,998 Capitalized research and development costs 18,896 24,748 Stock compensation 22,298 18,001 Tax loss carryovers 31,748 50,987 Foreign tax credit carryovers 10,369 1,064 Research and other tax credit carryovers 136,690 80,327 Other 5,161 5,340 Gross deferred tax assets 420,427 388,014 Valuation allowance (73,909 ) (48,700 ) Total deferred tax assets 346,518 339,314 Deferred tax liabilities: Intangible assets 54,604 66,345 Undistributed earnings of foreign subsidiaries 10,888 933 Total deferred tax liabilities 65,492 67,278 Net deferred tax assets $ 281,026 $ 272,036
Tax Loss and Credit Carryforwards Available to Offset Future Income Tax Liabilities	The Company has the following tax loss and credit carryforwards available to offset future income tax liabilities: Carryforward Amount Expiration Date (in thousands) Federal net operating loss carryforward $ 73,226 2018-2034 Federal research credit carryforward 172,959 2019-2036 Federal foreign tax credit carryforward 2,946 2019-2022 International foreign tax credit carryforward 9,445 Indefinite California research credit carryforward 160,442 Indefinite Other state research credit carryforward 7,145 2017-2031 State net operating loss carryforward 36,735 2017-2036
Summary of Reconciliation of Beginning and Ending Balance of Gross Unrecognized Tax Benefit	A reconciliation of the beginning and ending balance of gross unrecognized tax benefits is summarized as follows: As of October 31, 2016 As of October 31, 2015 (in thousands) Beginning balance $ 132,054 $ 124,102 Increases in unrecognized tax benefits related to prior year tax positions 7,205 10,922 Decreases in unrecognized tax benefits related to prior year tax positions (43,944 ) (7,526 ) Increases in unrecognized tax benefits related to current year tax positions 13,880 13,232 Decreases in unrecognized tax benefits related to settlements with taxing authorities (333 ) — Reductions in unrecognized tax benefits due to lapse of applicable statute of limitations (2,659 ) (5,996 ) Increases in unrecognized tax benefits acquired 49 976 Changes in unrecognized tax benefits due to foreign currency translation 290 (3,656 ) Ending balance $ 106,542 $ 132,054
Subsidiaries Remain Subject to Tax Examination	The Company and/or its subsidiaries remain subject to tax examination in the following jurisdictions: Jurisdiction Year(s) Subject to Examination United States Fiscal 2016 California Fiscal years after 2011 Hungary and Ireland Fiscal years after 2009 Japan and Taiwan Fiscal years after 2010

Other Income (Expense), Net (Ta

Other Income (Expense), Net (Tables)	12 Months Ended
	Oct. 31, 2016
Other Income and Expenses [Abstract]
Components of Other Income (Expense), Net	The following table presents the components of other income (expense), net: Year Ended October 31, 2016 2015 2014 (in thousands) Interest income $ 3,715 $ 2,785 $ 1,302 Interest expense (3,771 ) (2,814 ) (1,895 ) Gain (loss) on assets related to deferred compensation plan 4,400 3,701 10,856 Foreign currency exchange gain (loss) 156 6,363 1,195 Other, net 7,653 5,109 11,967 Total $ 12,153 $ 15,144 $ 23,425

Segment Disclosure (Tables)

Segment Disclosure (Tables)	12 Months Ended
	Oct. 31, 2016
Segment Reporting [Abstract]
Revenues Related to Operations by Geographic Areas	Revenues and property and equipment, net, related to operations in the United States and other by geographic areas were: Year Ended October 31, 2016 2015 2014 (in thousands) Revenue: United States $ 1,205,880 $ 1,143,816 $ 1,020,654 Europe 287,381 300,352 272,911 Japan 239,964 218,794 238,588 Asia Pacific and Other 689,307 579,249 525,319 Consolidated $ 2,422,532 $ 2,242,211 $ 2,057,472
Property and Equipment by Geographic Areas	As of October 31, 2016 2015 (in thousands) Property and Equipment, net: United States $ 186,854 $ 192,075 Other countries 70,181 71,002 Total $ 257,035 $ 263,077

Supplementary Data - Selected36

Supplementary Data - Selected Unaudited Quarterly Financial Data (Tables)	12 Months Ended
	Oct. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The table below includes certain unaudited financial information for the last eight fiscal quarters. Refer to Note 2 of Notes to Consolidated Financial Statements for information on our fiscal year end. Quarter Ended January 31, April 30, July 31, October 31, (in thousands, except per share data) 2016 Revenue $ 568,604 $ 605,005 $ 615,204 $ 633,719 Gross margin 439,160 473,375 475,527 491,508 Income before provision for income taxes 64,342 97,223 85,231 82,752 Net income 60,035 69,376 64,718 72,697 Net income per share Basic $ 0.39 $ 0.46 $ 0.43 $ 0.48 Diluted 0.39 0.45 0.42 0.47 2015 Revenue $ 542,043 $ 557,204 $ 555,805 $ 587,159 Gross margin 417,410 432,232 426,334 447,315 Income before provision for income taxes 76,615 83,884 65,193 55,918 Net income 65,189 55,596 55,387 49,762 Net income per share Basic $ 0.42 $ 0.36 $ 0.36 $ 0.32 Diluted 0.41 0.35 0.35 0.31

Summary of Significant Accoun37

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalent maturity period, months	3 months
Depreciation expenses	$ 73,800,000	$ 71,100,000	$ 63,100,000
Repair and maintenance costs	38,800,000	32,300,000	28,700,000
Goodwill impairment loss	0	0	0
Long-lived assets impairment loss	$ 0	0	0
Additional maintenance perpetual license period (in years)	20 years
Software product warranty period (in days)	90 days
Restructuring Charges	$ 9,633,000	15,088,000	$ 0
Term Licenses
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Perpetual licenses
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Perpetual And Term Licenses
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Hardware product warranty period (in months)	6 months
Intangible Assets | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets amortization period	1 year
Intangible Assets | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets amortization period	10 years
Voluntary Retirement Program and Headcount Reduction Program
Summary Of Significant Accounting Policies [Line Items]
Payroll and related benefits liabilities		0
Restructuring Charges		$ 15,100,000
2016 Restructuring
Summary Of Significant Accounting Policies [Line Items]
Payroll and related benefits liabilities	$ 5,700,000
Involuntary Termination Benefits | 2016 Restructuring
Summary Of Significant Accounting Policies [Line Items]
Payments for restructuring charges	3,900,000
Restructuring Charges	$ 9,600,000

Summary of Significant Accoun38

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Components of Accounts Receivables (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract]
Accounts receivable	$ 394,314	$ 354,688
Unbilled accounts receivables	47,760	33,567
Total accounts receivable	442,074	388,255
Accounts receivable, allowances	(3,201)	(2,561)	$ (2,026)	$ (4,253)
Total accounts receivable, net	$ 438,873	$ 385,694

Summary of Significant Accoun39

Summary of Significant Accounting Policies - Changes in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at Beginning of Period	$ 2,561	$ 2,026	$ 4,253
Provisions	950	1,300	(1,250)
Write-offs	(310)	(765)	(977)
Balance at End of Period	$ 3,201	$ 2,561	$ 2,026

Summary of Significant Accoun40

Summary of Significant Accounting Policies - Components of Property and Equipment (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Property, Plant and Equipment, Net [Abstract]
Computer and other equipment	$ 486,109	$ 436,425
Buildings	68,194	67,943
Furniture and fixtures	51,589	50,075
Land	20,414	20,414
Leasehold improvements	136,773	142,275
Property, Plant and Equipment, Gross, Total	763,079	717,132
Less accumulated depreciation and amortization(1)	(506,044)	(454,055)
Total	$ 257,035	$ 263,077

Summary of Significant Accoun41

Summary of Significant Accounting Policies - Useful Lives of Depreciable Assets (Detail)	12 Months Ended
	Oct. 31, 2016
Computer and other equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets, years	3 years
Computer and other equipment | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets, years	5 years
Buildings
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets, years	30 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets, years	5 years
Leasehold improvements (average)
Property, Plant and Equipment [Line Items]
Useful lives of depreciable assets, years	5 years

Summary of Significant Accoun42

Summary of Significant Accounting Policies - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Accounts payable and accrued liabilities Current
Payroll and related benefits	$ 321,430	$ 315,078
Other accrued liabilities	66,276	60,545
Accounts payable	13,745	9,919
Total	$ 401,451	$ 385,542

Summary of Significant Accoun43

Summary of Significant Accounting Policies - Components of Other Long Term Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Liabilities Other than long term debt non current
Deferred compensation liability (See Note 10)	$ 163,185	$ 158,462
Other long-term liabilities	47,670	43,559
Total	$ 210,855	$ 202,021

Summary of Significant Accoun44

Summary of Significant Accounting Policies - Reconciliation of Weighted Average Common Shares Used to Calculate Basic Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Earnings Per Share [Abstract]
Net income									$ 266,826	$ 225,934	$ 259,124
Weighted average common shares for basic net income per share									152,017	154,957	155,054
Dilutive effect of common share equivalents from equity—based compensation									2,704	3,108	2,656
Weighted average common shares for diluted net income per share									154,721	158,065	157,710
Basic (in USD per share)	$ 0.48	$ 0.43	$ 0.46	$ 0.39	$ 0.32	$ 0.36	$ 0.36	$ 0.42	$ 1.76	$ 1.46	$ 1.67
Diluted (in USD per share)	$ 0.47	$ 0.42	$ 0.45	$ 0.39	$ 0.31	$ 0.35	$ 0.35	$ 0.41	$ 1.73	$ 1.43	$ 1.64
Anti-dilutive employee stock-based awards excluded									1,971	1,363	2,196

Business Combinations Business

Business Combinations Business Combinations - 2015 Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 2,518,245	$ 2,471,241	$ 2,255,708
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Acquisition-related costs	4,200
Payments to acquire businesses, net of cash acquired	56,600
Goodwill	39,200
Business acquisition, goodwill, expected tax deductible amount	6,100
Identifiable intangibles assets acquired	$ 23,500
Provisional information, initial accounting incomplete, measurement period	12 months
Minimum [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Definite lived intangible asset amortization period	1 year
Maximum [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Definite lived intangible asset amortization period	7 years

Goodwill and Intangible Asset46

Goodwill and Intangible Assets - Summary of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Goodwill [Roll Forward]
Beginning Balance	$ 2,471,241	$ 2,255,708
Additions	39,172	233,989
Goodwill, Translation Adjustments	7,397	(19,140)
Goodwill, Purchase Accounting Adjustments	435	684
Ending balance	$ 2,518,245	$ 2,471,241

Goodwill and Intangible Asset47

Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,068,428	$ 1,030,594
Accumulated Amortization	801,767	666,935
Net Assets	266,661	363,659
Core-developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	610,812	584,293
Accumulated Amortization	460,722	375,395
Net Assets	150,090	208,898
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	235,997	231,908
Accumulated Amortization	139,932	115,170
Net Assets	96,065	116,738
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	171,248	168,153
Accumulated Amortization	162,183	144,293
Net Assets	9,065	23,860
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	20,729	20,729
Accumulated Amortization	13,821	10,665
Net Assets	6,908	10,064
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	29,642	25,511
Accumulated Amortization	25,109	21,412
Net Assets	$ 4,533	$ 4,099

Goodwill and Intangible Asset48

Goodwill and Intangible Assets - Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 133,321	$ 139,681	$ 129,700
Core-developed technology
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	85,331	76,674	70,675
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	24,594	23,104	22,470
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	16,543	33,350	30,665
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	3,156	2,900	2,309
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 3,697	$ 3,653	$ 3,581

Goodwill and Intangible Asset49

Goodwill and Intangible Assets - Estimated Future Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,017	$ 97,109
2,018	71,091
2,019	46,551
2,020	31,683
2,021	14,865
2022 and thereafter	5,362
Net Assets	$ 266,661	$ 363,659

Financial Assets and Liabilit50

Financial Assets and Liabilities - Additional Information (Detail)	12 Months Ended
	Oct. 31, 2016
Financial Assets And Liabilities [Line Items]
Derivative, Maximum Shipment Period For Entry Into Foreign Currency Forward Contract	1 month
Period for hedge balance in OCI to be reclassified to statement of operations (in months)	12 months
Non-Designated Hedging Instrument
Financial Assets And Liabilities [Line Items]
Maximum Length of Time, Foreign Currency Cash Flow Hedge	1 month
Foreign Currency Derivative Contracts | Minimum [Member]
Financial Assets And Liabilities [Line Items]
Forward contracts terms (in months)	1 month
Foreign Currency Derivative Contracts | Maximum [Member]
Financial Assets And Liabilities [Line Items]
Forward contracts terms (in months)	22 months
Foreign Currency Derivative Contracts | Cash Flow Hedging | Maximum [Member]
Financial Assets And Liabilities [Line Items]
Forward contracts terms (in months)	3 years
Foreign Exchange Forward | Cash Flow Hedging | Maximum [Member]
Financial Assets And Liabilities [Line Items]
Forward contracts terms (in months)	22 months
Foreign Exchange Contracts | Maximum [Member]
Financial Assets And Liabilities [Line Items]
Duration of foreign exchange forward contracts	1 year

Financial Assets and Liabilit51

Financial Assets and Liabilities - Summary of Cash Cash Equivalents and Investments (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Cash Equivalents [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	$ 504,972	$ 239,473
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less than 12 Months	0	(1)
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	504,972	239,472
Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	140,676	128,774
Gross Unrealized Gains	60	33
Gross Unrealized Losses Less than 12 Months	(41)	(60)
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	140,695	128,747
Other Long-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Non-marketable equity securities, Cost	9,756	10,277
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less Than 12Months	0	0
Gross Unrealized Loss Position 12Months Or Longer	0	0
Non-marketable equity securities	9,756	10,277
Money Market Funds (U.S.) | Cash Equivalents [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	499,274	233,839
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less than 12 Months	0	0
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	499,274	233,839
Commercial Paper [Member] | Cash Equivalents [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	1,498	1,834
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less than 12 Months	0	0
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	1,498	1,834
Commercial Paper [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	25,430	12,129
Gross Unrealized Gains	1	0
Gross Unrealized Losses Less than 12 Months	0	0
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	25,431	12,129
US Government Agency Securities [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	13,607	12,615
Gross Unrealized Gains	4	3
Gross Unrealized Losses Less than 12 Months	(8)	(4)
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	13,603	12,614
Municipal Bonds [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost		1,403
Gross Unrealized Gains		1
Gross Unrealized Losses Less than 12 Months		(1)
Gross Unrealized Losses 12 Months or Longer		0
Estimated Fair Value		1,403
Certificates of Deposit [Member] | Cash Equivalents [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	4,200	3,500
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less than 12 Months	0	0
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	4,200	3,500
Certificates of Deposit [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	12,849	9,800
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less than 12 Months	0	0
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	12,849	9,800
Corporate Debt Securities [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	58,753	67,201
Gross Unrealized Gains	43	27
Gross Unrealized Losses Less than 12 Months	(18)	(40)
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	58,778	67,188
Asset-backed Securities [Member] | Cash Equivalents [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost		300
Gross Unrealized Gains		0
Gross Unrealized Losses Less than 12 Months		(1)
Gross Unrealized Losses 12 Months or Longer		0
Estimated Fair Value		299
Asset-backed Securities [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	22,146	24,619
Gross Unrealized Gains	12	2
Gross Unrealized Losses Less than 12 Months	(12)	(13)
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	22,146	24,608
Non-U.S. Government Agency Securities [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	3,403	1,007
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less than 12 Months	(3)	(2)
Gross Unrealized Losses 12 Months or Longer	0	0
Estimated Fair Value	3,400	1,005
Others [Member] | Short-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Available-for-sale Securities, Cost	4,488
Gross Unrealized Gains	0
Gross Unrealized Losses Less than 12 Months	0
Gross Unrealized Losses 12 Months or Longer	0
Estimated Fair Value	4,488
Non-Marketable Equity Securities [Member] | Other Long-term Investments [Member]
Cash, Cash Equivalents and Investments [Line Items]
Non-marketable equity securities, Cost	9,756	10,277
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less Than 12Months	0	0
Gross Unrealized Loss Position 12Months Or Longer	0	0
Non-marketable equity securities	$ 9,756	$ 10,277

Financial Assets and Liabilit52

Financial Assets and Liabilities - Investments Maturity Table (Details) $ in Thousands	Oct. 31, 2016USD ($)
Available-for-Amortized Cost
Due in 1 year or less	$ 94,439
Due in 2-5 years	46,200
Due in 6-10 years	37
Total	140,676
Fair Value
Due in 1 year or less	94,439
Due in 2-5 years	46,219
Due in 6-10 years	37
Total	$ 140,695

Financial Assets and Liabilit53

Financial Assets and Liabilities - Effects on Changes in Fair Values of Non-Designated Forward Contracts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Financial Assets And Liabilities [Abstract]
Gain (loss) recorded in other income (expense), net	$ (4,533)	$ (5,554)	$ (3,301)

Financial Assets and Liabilit54

Financial Assets and Liabilities - Notional Amounts of Derivative Instruments (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Financial Assets And Liabilities [Abstract]
Total gross notional amount	$ 758,246	$ 781,752
Net fair value	$ (15,358)	$ (3,819)

Financial Assets and Liabilit55

Financial Assets and Liabilities - Fair Values of Derivative Instrument Designated and Non-Designated as Hedging Instruments in Balance Sheet (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Designated As Hedging Instrument | Other current assets
Financial Assets And Liabilities [Line Items]
Fair values of derivative instruments	$ 4,625	$ 6,461
Designated As Hedging Instrument | Accrued liabilities
Financial Assets And Liabilities [Line Items]
Fair values of derivative instruments	19,910	10,141
Non-Designated Hedging Instrument | Other current assets
Financial Assets And Liabilities [Line Items]
Fair values of derivative instruments	27	1
Non-Designated Hedging Instrument | Accrued liabilities
Financial Assets And Liabilities [Line Items]
Fair values of derivative instruments	$ 101	$ 140

Financial Assets and Liabilit56

Financial Assets and Liabilities - Income Statement Location and Amount of Gains and Losses on Derivative Instrument Fair Values for Designated Hedge Instruments, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Financial Assets And Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	$ (25,839)	$ (18,623)	$ (5,501)
Amount of gain (loss) reclassified from OCI (effective portion)	(20,710)	(14,923)	3,882
Foreign Exchange Contracts | Revenue
Financial Assets And Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(14,580)	3,982	5,395
Amount of gain (loss) reclassified from OCI (effective portion)	(8,585)	9,270	2,339
Foreign Exchange Contracts | Operating Expenses
Financial Assets And Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(11,259)	(22,605)	(10,896)
Amount of gain (loss) reclassified from OCI (effective portion)	$ (12,125)	$ (24,193)	$ 1,543

Financial Assets and Liabilit57

Financial Assets and Liabilities - Ineffective Portion and Portion Excluded from Effectiveness Testing of Derivative Hedge Gains (Losses) (Detail) - Foreign Exchange Contracts - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Financial Assets And Liabilities [Line Items]
Amount of gain (loss) recognized in income statement on derivatives (ineffective portion)	$ 1,468	$ 878	$ (302)
Amount of gain (loss) recognized in income statement on derivatives (excluded from effectiveness testing)	$ 6,058	$ 3,704	$ 3,259

Financial Assets and Liabilit58

Financial Assets and Liabilities - Credit and Term Loan Facilities, Additional Information (Detail) - Unsecured Debt [Member] - USD ($)	Nov. 28, 2016	May 19, 2015	Feb. 17, 2012	Oct. 31, 2016	Dec. 09, 2016	Oct. 31, 2015
The Credit Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, periodic payment, principal			$ 7,500,000
Senior unsecured term loan facility, face amount			150,000,000
Senior unsecured term loan facility				$ 0		$ 45,000,000
Revolving Credit Facility [Member] | The Credit Agreement [Member]
Debt Instrument [Line Items]
Senior unsecured revolving credit facility maximum borrowing capacity		$ 500,000,000	$ 350,000,000
Senior unsecured term loan facility additional borrowings		$ 150,000,000
Short-term line of credit				$ 205,000,000		$ 160,000,000
Revolving Credit Facility [Member] | The Credit Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Commitment fees percentage				0.125%
Revolving Credit Facility [Member] | The Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Commitment fees percentage				0.20%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | The Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings, interest rate				1.00%
Subsequent Event [Member] | November 2016 Agreement [Member]
Debt Instrument [Line Items]
Senior unsecured term loan facility, face amount	$ 150,000,000
Senior unsecured term loan facility					$ 150,000,000
Subsequent Event [Member] | Revolving Credit Facility [Member] | November 2016 Agreement [Member]
Debt Instrument [Line Items]
Senior unsecured revolving credit facility maximum borrowing capacity	650,000,000
Senior unsecured term loan facility additional borrowings	$ 150,000,000
Short-term line of credit					$ 205,000,000

Fair Value Measures - Assets an

Fair Value Measures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	$ 813,504	$ 533,143
Total liabilities	183,195	168,743
Deferred compensation plan liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Liabilities, Fair Value Disclosure	163,185	158,462
Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets	163,185	158,462
Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	4,652	6,462
Accounts payable and accrued liabilities	20,010	10,281
Money Market Funds (U.S.) | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	499,274	233,839
Commercial Paper [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,498	1,834
Commercial Paper [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	25,431	12,129
US Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	13,603	12,614
Municipal Bonds [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure		1,403
Certificates of Deposit [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	4,200	3,500
Certificates of Deposit [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	12,849	9,800
Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	58,778	67,188
Asset-backed Securities [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents		299
Asset-backed Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	22,146	24,608
Non-U.S. Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	3,400	1,005
Others [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	4,488
Quoted Prices In Active Markets For Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	666,947	392,301
Total liabilities	163,185	158,462
Quoted Prices In Active Markets For Identical Assets (Level 1) | Deferred compensation plan liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Liabilities, Fair Value Disclosure	163,185	158,462
Quoted Prices In Active Markets For Identical Assets (Level 1) | Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets		158,462
Quoted Prices In Active Markets For Identical Assets (Level 1) | Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	0	0
Accounts payable and accrued liabilities	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Money Market Funds (U.S.) | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	499,274	233,839
Quoted Prices In Active Markets For Identical Assets (Level 1) | Commercial Paper [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Commercial Paper [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | US Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Municipal Bonds [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure		0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Certificates of Deposit [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Certificates of Deposit [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Asset-backed Securities [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents		0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Asset-backed Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Non-U.S. Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Others [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	4,488
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	146,557	140,842
Total liabilities	20,010	10,281
Significant Other Observable Inputs (Level 2) | Deferred compensation plan liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Liabilities, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) | Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets	0	0
Significant Other Observable Inputs (Level 2) | Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	4,652	6,462
Accounts payable and accrued liabilities	20,010	10,281
Significant Other Observable Inputs (Level 2) | Money Market Funds (U.S.) | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Significant Other Observable Inputs (Level 2) | Commercial Paper [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,498	1,834
Significant Other Observable Inputs (Level 2) | Commercial Paper [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	25,431	12,129
Significant Other Observable Inputs (Level 2) | US Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	13,603	12,614
Significant Other Observable Inputs (Level 2) | Municipal Bonds [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure		1,403
Significant Other Observable Inputs (Level 2) | Certificates of Deposit [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	4,200	3,500
Significant Other Observable Inputs (Level 2) | Certificates of Deposit [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	12,849	9,800
Significant Other Observable Inputs (Level 2) | Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	58,778	67,188
Significant Other Observable Inputs (Level 2) | Asset-backed Securities [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents		299
Significant Other Observable Inputs (Level 2) | Asset-backed Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	22,146	24,608
Significant Other Observable Inputs (Level 2) | Non-U.S. Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	3,400	1,005
Significant Other Observable Inputs (Level 2) | Others [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) | Deferred compensation plan liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Liabilities, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Deferred Compensation Plan Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other long-term assets	0	0
Significant Unobservable Inputs (Level 3) | Foreign Currency Derivative Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid and other current assets	0	0
Accounts payable and accrued liabilities	0	0
Significant Unobservable Inputs (Level 3) | Money Market Funds (U.S.) | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Significant Unobservable Inputs (Level 3) | Commercial Paper [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Significant Unobservable Inputs (Level 3) | Commercial Paper [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | US Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Municipal Bonds [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure		0
Significant Unobservable Inputs (Level 3) | Certificates of Deposit [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Significant Unobservable Inputs (Level 3) | Certificates of Deposit [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Asset-backed Securities [Member] | Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents		0
Significant Unobservable Inputs (Level 3) | Asset-backed Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Non-U.S. Government Agency Securities [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	0	$ 0
Significant Unobservable Inputs (Level 3) | Others [Member] | Short-term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Minimum Lease Commitments (Detail) $ in Thousands	Oct. 31, 2016USD ($)
Commitments and Contingencies Disclosure [Abstract]
Minimum lease payments, 2017	$ 52,373
Minimum lease payments, 2018	50,938
Minimum lease payments, 2019	46,506
Minimum lease payments, 2020	35,835
Minimum lease payments, 2021	28,801
Minimum lease payments, thereafter	171,040
Minimum lease payments, total	385,493
Sublease income, 2017	2,141
Sublease income, 2018	2,173
Sublease income, 2019	2,179
Sublease income, 2020	2,239
Sublease income, 2021	2,184
Sublease income, thereafter	2,247
Sublease income, total	13,163
Net, 2017	50,232
Net, 2018	48,765
Net, 2019	44,327
Net, 2020	33,596
Net, 2021	26,617
Net, Thereafter	168,793
Net, Total	$ 372,330

Commitments and Contingencies61

Commitments and Contingencies - Additional Information (Detail) ft² in Thousands, $ in Millions	Oct. 10, 2014USD ($)	Oct. 31, 2016USD ($)ft²Building	Oct. 31, 2015USD ($)	Oct. 31, 2014USD ($)
Loss Contingencies [Line Items]
Rent expenses		$ 63.9	$ 67.6	$ 65.6
Number of buildings to be leased | Building		2
Total square feet of buildings | ft²		341
Lease renewal term, in years		10 years
Second lease renewal term, years		9 years
Mentor litigation
Loss Contingencies [Line Items]
Jury verdict assessing damages, value	$ 36

Accumulated Other Comprehensi62

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative currency translation adjustments	$ (84,700)	$ (90,508)
Unrealized gain (loss) on derivative instruments, net of taxes	(19,896)	(14,839)
Unrealized gain (loss) on available-for-sale securities, net of taxes	19	(28)
Total accumulated other comprehensive income (loss)	$ (104,577)	$ (105,375)

Accumulated Other Comprehensi63

Accumulated Other Comprehensive Income (Loss) - Effect of Amounts Reclassified out of Each Component of Accumulated Other Comprehensive Income (Loss) into Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ 633,719	$ 615,204	$ 605,005	$ 568,604	$ 587,159	$ 555,805	$ 557,204	$ 542,043	$ 2,422,532	$ 2,242,211	$ 2,057,472
Operating expenses									1,562,175	1,456,825	1,351,870
Other income (expense), net									12,153	15,144	23,425
Reclassifications into net income									(20,692)	(14,882)	3,882
Reclassification out of accumulated other comprehensive income (loss) | Gain (loss) on cash flow hedges, net of taxes
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue									(8,585)	9,270	2,339
Operating expenses									(12,125)	(24,193)	1,543
Reclassification out of accumulated other comprehensive income (loss) | Gain (loss) on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net									$ 18	$ 41	$ 0

Stock Repurchase Activities (De

Stock Repurchase Activities (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Stock Repurchase Program
Purchases of treasury stock, shares	8,506	5,672	3,092
Average purchase price	$ 49.37	$ 45.84	$ 38.72
Aggregate purchase price	$ 420,000	$ 260,000	$ 119,747
Reissuance of treasury stock	4,803	4,864	4,888

Stock Repurchase Program - Addi

Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	Dec. 09, 2016	Aug. 31, 2016	May 31, 2016	Apr. 30, 2016	Dec. 31, 2015	Aug. 31, 2015	Feb. 16, 2017	Jan. 31, 2016	Aug. 31, 2016	May 31, 2016	Jan. 31, 2016	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Equity, Class of Treasury Stock [Line Items]
Average purchase price												$ 49.37	$ 45.84	$ 38.72
Purchases of treasury stock, shares												8,506	5,672	3,092
Stock repurchase program authorized amount		$ 500							$ 500			$ 500
Remaining amount available for further repurchases												$ 436
Accelerated Share Repurchase Program August 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Average purchase price											$ 48.06
Stock repurchase program, prepayment during period						$ 100
Accelerated share repurchase, initial share delivery, amount						80
Stock repurchase program, prepayment during period, derivative settlement								$ 20
Purchases of treasury stock, shares											2,100
Stock repurchase program authorized amount						$ 100
Accelerated Share Repurchase Program December 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Average purchase price										$ 44.40
Stock repurchase program, prepayment during period					$ 200
Accelerated share repurchase, initial share delivery, amount					160
Stock repurchase program, prepayment during period, derivative settlement			$ 20	$ 20
Purchases of treasury stock, shares										4,500
Stock repurchase program authorized amount					$ 200
Accelerated Share Repurchase Program May 2016 [Member]
Equity, Class of Treasury Stock [Line Items]
Average purchase price									$ 52.98
Stock repurchase program, prepayment during period			125
Accelerated share repurchase, initial share delivery, amount			100							$ 100
Stock repurchase program, prepayment during period, derivative settlement		$ 25
Purchases of treasury stock, shares									2,400
Stock repurchase program authorized amount			$ 125							$ 125
Subsequent Event [Member] | Accelerated Share Repurchase Program December 2016 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, prepayment during period	$ 100
Accelerated share repurchase, initial share delivery, amount	80
Stock repurchase program authorized amount	$ 100
Scenario, Forecast [Member] | Accelerated Share Repurchase Program December 2016 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, prepayment during period, derivative settlement							$ 20

Employee Benefit Plans (Employe

Employee Benefit Plans (Employee Stock Purchase Plan) - Additional Information (Detail) - $ / shares shares in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	Mar. 29, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Threshold for employee stock purchases under ESPP, maximum value	85.00%
ESPP offering period (in years)	2 years
Increase in number of shares authorized for issuance under plan				5
Shares issued	1.6	1.7	1.8
Weighted average purchase price of stock purchased	$ 37.77	$ 31.55	$ 30
Shares reserved for future issuance under the ESPP	8.7

Employee Benefit Plans (Equity

Employee Benefit Plans (Equity Compensation Plans) - Additional Information (Detail) - USD ($) $ in Millions	Mar. 29, 2016	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013	May 23, 2005
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate restricted stock units outstanding		4,035,000	3,928,000	3,947,000	3,983,000
Restricted Stock Units | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)		3 years
Restricted Stock Units | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)		4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate restricted stock units outstanding		43,000	45,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grant		11,244,000	11,883,000	12,155,000	8,472,000
2006 Employee Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement for options contractual term (in years)		7 years
Vesting period, (in years)		4 years
Additional reserved for future issuance under the 2006 Employee Plan	3,800,000
Shares available for future grant		11,200,000
2006 Employee Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate restricted stock units outstanding		4,000,000
2006 Employee Equity Incentive Plan | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate stock options outstanding		6,300,000
2005 Directors Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for future issuance		241,690				800,000
Restricted stock awards issued		363,782
Aggregate grant date fair value of restricted stock awards		$ 11.5
2005 Directors Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)		3 years
Aggregate restricted stock units outstanding		42,588
2005 Directors Plan | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate stock options outstanding		76,369
Aggregate stock options granted under 2005 director plan		157,871
Fair value of option shares granted		$ 4.7
2005 Directors Plan | Stock Option | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)		3 years
2005 Directors Plan | Stock Option | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)		4 years
Other Assumed Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Assumed shares remaining outstanding		400,000

Employee Benefit Plans (Restric

Employee Benefit Plans (Restricted Stock Units) - Additional Information (Detail) $ / shares in Units, $ in Millions	Mar. 29, 2016	Apr. 02, 2015	Apr. 03, 2012	Oct. 31, 2016USD ($)$ / shares
Schedule Of Restricted Stock [Line Items]
Closing stock price | $ / shares				$ 58.37
Unamortized share-based compensation expense | $				$ 173.8
Weighted-average period of total compensation costs to be recognized in years				2 years 6 months
Restricted Stock Units
Schedule Of Restricted Stock [Line Items]
Share reserve ratio	1.60	1.50	1.25
Revised share reserve ratio	1.70	1.60	1.50
Restricted Stock Units | Minimum [Member]
Schedule Of Restricted Stock [Line Items]
Vesting period, (in years)				3 years
Restricted Stock Units | Maximum [Member]
Schedule Of Restricted Stock [Line Items]
Vesting period, (in years)				4 years

Employee Benefit Plans - Restri

Employee Benefit Plans - Restricted Stock Units (Detail) - Restricted Stock Units - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted Stock Awards, Beginning balance	3,928	3,947	3,983
Restricted Stock Units, Granted	1,765	1,707	1,645
Restricted Stock Units, Vested	(1,547)	(1,522)	(1,564)
Restricted Stock Units, Forfeited	(111)	(204)	(117)
Restricted Stock Awards, Ending balance	4,035	3,928	3,947	3,983
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning balance	$ 41.61	$ 35.29	$ 31.23
Granted	49.59	48.13	39.03
Vested	38.33	33.05	29.07
Forfeited	43.12	37.68	32.95
Weighted Average Grant Date Fair Value, Ending balance	$ 46.37	$ 41.61	$ 35.29	$ 31.23
Weighted Average Remaining Contractual Life	1 year 6 months 22 days	1 year 6 months 15 days	1 year 6 months 11 days	1 year 6 months 4 days
Aggregate Fair Value, Vested	$ 79,558	$ 73,677	$ 60,815

Employee Benefit Plans - Stock

Employee Benefit Plans - Stock Options and Restricted Stock Units Under all Equity Plans (Except 2005 Director's Plan) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted- Average Exercise Price per Share, Options Exercised	$ 30.06	$ 26.06	$ 24.47
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for Grant, Beginning Balance	11,883	12,155	8,472
Available for Grant, Options Granted	(1,685)	(1,908)	(1,686)
Available for Grant, Options Canceled/forfeited/expired	33	230	163
Available for Grant, Restricted stock units granted	(2,967)	(2,707)	(2,468)
Available for Grant, Restricted stock units forfeited	180	313	174
Available for Grant, Additional shares reserved	3,800	3,800	7,500
Available for Grants, Ending balance	11,244	11,883	12,155	8,472
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Options Granted	1,685	1,942	1,686
Options Outstanding, Options Assumed		133	843
Options Outstanding, Options Exercised	(2,154)	(2,125)	(2,103)
Options Outstanding, Options Canceled/forfeited/expired	(65)	(411)	(402)
Options Outstanding, Vested and expected to vest	6,641
Options Outstanding, Exercisable	3,282
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted- Average Exercise Price per Share, Beginning Balance	$ 34.94	$ 29.81	$ 26.87
Weighted- Average Exercise Price per Share, Options Granted	47.39	45.14	38.65
Weighted- Average Exercise Price per Share, Options Assumed		38.97	24.63
Weighted- Average Exercise Price per Share, Options Exercised	30.06	26.06	24.47
Weighted- Average Exercise Price per Share, Options Canceled/forfeited/expired	35.31	33.51	27.44
Weighted- Average Exercise Price per Share, Ending Balance	39.59	$ 34.94	$ 29.81	$ 26.87
Weighted- Average Exercise Price per Share, Vested and expected to vest	39.48
Weighted- Average Exercise Price per Share, Exercisable	$ 34.46
Weighted Average Remaining Contractual Life, options outstanding	4 years 7 months 24 days	4 years 8 months 1 day	4 years 7 months 28 days	4 years 3 months 18 days
Weighted-Average Remaining Contractual Life , Vested and expected to vest	4 years 7 months 17 days
Weighted-Average Remaining Contractual Life , Exercisable	3 years 8 months 1 day
Aggregate Intrinsic Value, Beginning Balance	$ 109,627	$ 86,537	$ 71,700
Aggregate Intrinsic Value, Ending Balance	126,850	$ 109,627	$ 86,537	$ 71,700
Aggregate Intrinsic Value, Vested and expected to vest	125,429
Aggregate Intrinsic Value, Exercisable	$ 78,478
Stock Option | All Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Beginning Balance	7,289	7,750	7,726
Options Outstanding, Ending Balance	6,755	7,289	7,750	7,726

Employee Benefit Plans - Pretax

Employee Benefit Plans - Pretax Intrinsic Value of Options Exercised and Their Average Exercise Prices (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Intrinsic value	$ 51,408	$ 44,104	$ 32,094
Average exercise price per share	$ 30.06	$ 26.06	$ 24.47

Employee Benefit Plans - Summar

Employee Benefit Plans - Summary of Restricted Stock Award Activities Under Twenty Zero Five Directors Plan (Detail) - Restricted Stock shares in Thousands	12 Months Ended
	Oct. 31, 2016$ / sharesshares
Restricted shares
Restricted Stock Awards, Beginning balance | shares	45
Granted | shares	21
Vested | shares	(23)
Forfeited | shares	0
Restricted Stock Awards, Ending balance | shares	43
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance | $ / shares	$ 41.82
Granted | $ / shares	48.27
Vested | $ / shares	39.94
Forfeited | $ / shares	0
Weighted Average Grant Date Fair Value, Ending balance | $ / shares	$ 45.97

Employee Benefit Plans - Stoc73

Employee Benefit Plans - Stock Option Plans and Stock Purchase Rights Granted Under ESPP (Detail) - $ / shares	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Stock Option
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (in years)	4 years 1 month 6 days	4 years 3 months 18 days	4 years 6 months
Risk-free interest rate, minimum	1.06%	1.24%	1.38%
Risk-free interest rate, maximum	1.63%	1.58%	1.74%
Volatility, minimum	19.21%	16.92%	18.38%
Volatility, maximum	21.62%	21.76%	20.00%
Weighted average estimated fair value	$ 8.97	$ 8.77	$ 10.95
Employee Stock Purchase Plan
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Risk-free interest rate, minimum	0.53%	0.12%	0.05%
Risk-free interest rate, maximum	0.86%	0.75%	0.58%
Volatility, minimum	17.03%	18.01%	16.84%
Volatility, maximum	25.46%	21.60%	18.78%
Weighted average estimated fair value	$ 12.75	$ 11.11	$ 9.17
Employee Stock Purchase Plan | Minimum [Member]
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (in years)	6 months	6 months	6 months
Employee Stock Purchase Plan | Maximum [Member]
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (in years)	2 years	2 years	2 years

Employee Benefit Plans - Stoc74

Employee Benefit Plans - Stock Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	$ 97,583	$ 86,400	$ 79,440
Income tax benefit	(25,967)	(20,071)	(18,224)
Stock compensation expense after taxes	71,616	66,329	61,216
Cost of products
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	11,006	9,162	8,122
Cost of maintenance and service
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	2,418	2,164	2,336
Research and development expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	49,511	43,431	38,241
Sales and marketing expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	19,690	17,744	16,754
General and administrative expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	$ 14,958	$ 13,899	$ 13,987

Employee Benefit Plans - (Other

Employee Benefit Plans - (Other Retirement Plans) - Additional Information (Detail)	12 Months Ended
	Oct. 31, 2016USD ($)	Oct. 31, 2016CAD	Oct. 31, 2015USD ($)	Oct. 31, 2014USD ($)
Other Retirement Plans [Line Items]
Deferred percentage of annual cash base compensation	50.00%	50.00%
Deferred percentage of variable cash compensation	100.00%	100.00%
Other Retirement Plans
Other Retirement Plans [Line Items]
Employer contribution	$ 53,400,000		$ 40,000,000	$ 23,800,000
Maximum pretax annual company contribution match per employee	$ 3,000	CAD 4,000

Employee Benefit Plans - Deferr

Employee Benefit Plans - Deferred Plan Assets and Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Plan assets recorded in other long-term assets	$ 163,185	$ 158,462
Plan liabilities recorded in other long-term liabilities	$ 163,185	$ 158,462

Employee Benefit Plans - Summ77

Employee Benefit Plans - Summary of Impact of Deferred Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Increase (reduction) to cost of revenue and operating expense	$ 4,400	$ 3,701	$ 10,856
Other income (expense), net	4,400	3,701	10,856
Net increase (decrease) to net income	$ 0	$ 0	$ 0

Income Taxes - Domestic and For

Income Taxes - Domestic and Foreign Components of Total Income Before Provision for Income Tax (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Income Tax Disclosure [Abstract]
United States									$ 22,134	$ 42,571	$ (7,638)
Foreign									307,414	239,039	279,780
Income before provision for income taxes	$ 82,752	$ 85,231	$ 97,223	$ 64,342	$ 55,918	$ 65,193	$ 83,884	$ 76,615	$ 329,548	$ 281,610	$ 272,142

Income Taxes - Components of (B

Income Taxes - Components of (Benefit) Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Income Tax Disclosure [Abstract]
Federal	$ (6,106)	$ (21,911)	$ (14,951)
State	2,670	1,385	279
Foreign	80,195	39,319	42,085
Current Income Tax Expense (Benefit), Total	76,759	18,793	27,413
Federal	(23,510)	44,462	(4,612)
State	11,950	(2,282)	(4,141)
Foreign	(2,477)	(5,297)	(5,642)
Deferred Income Tax Expense (Benefit), Total	(14,037)	36,883	(14,395)
Provision (Benefit) for income taxes	$ 62,722	$ 55,676	$ 13,018

Income Taxes - Rate Reconciliat

Income Taxes - Rate Reconciliation Between Provision for Income Taxes and Taxes Computed at Statutory Federal Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Income Tax Disclosure [Abstract]
Statutory federal tax	$ 115,343	$ 98,564	$ 95,251
State tax (benefit), net of federal effect	11,015	(4,764)	(4,306)
Tax credits	(36,979)	(13,301)	(5,153)
Tax on foreign earnings less than U.S. statutory tax	(68,246)	(56,536)	(61,376)
Tax settlements	(16,479)	(6,251)	(19,645)
Stock based compensation	5,709	5,406	5,675
Changes in valuation allowance	428	(216)	(235)
Federal statute lapses	0	(2,265)	(6,746)
Integration of acquired technologies, tax amount	37,525	33,015	4,715
Undistributed Earnings of Foreign Subsidiaries	9,595	0	0
Other	4,811	2,024	4,838
Provision (Benefit) for income taxes	$ 62,722	$ 55,676	$ 13,018

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Deferred Tax Assets, Gross [Abstract]
Accruals and reserves	$ 34,324	$ 40,373
Deferred revenue	42,497	36,460
Deferred compensation	64,321	69,716
Capitalized costs	54,123	60,998
Capitalized research and development costs	18,896	24,748
Stock compensation	22,298	18,001
Tax loss carryovers	31,748	50,987
Foreign tax credit carryovers	10,369	1,064
Research and other tax credit carryovers	136,690	80,327
Other	5,161	5,340
Gross deferred tax assets	420,427	388,014
Valuation allowance	(73,909)	(48,700)
Total deferred tax assets	346,518	339,314
Deferred Tax Liabilities, Gross [Abstract]
Intangible assets	54,604	66,345
Undistributed earnings of foreign subsidiaries	10,888	933
Total deferred tax liabilities	65,492	67,278
Net deferred tax assets	$ 281,026	$ 272,036

Income Taxes - Tax Loss and Cre

Income Taxes - Tax Loss and Credit Carryforwards Available to Offset Future Income Tax Liabilities (Detail) $ in Thousands	Oct. 31, 2016USD ($)
Federal
Net Operating Loss and Tax Credit Carryforward [Line Items]
Net operating loss carryforward	$ 73,226
Credit carryforward	172,959
Foreign Tax Credit Used in Domestic Country
Net Operating Loss and Tax Credit Carryforward [Line Items]
Credit carryforward	2,946
International Foreign
Net Operating Loss and Tax Credit Carryforward [Line Items]
Credit carryforward	9,445
California Research
Net Operating Loss and Tax Credit Carryforward [Line Items]
Credit carryforward	160,442
Other State Research
Net Operating Loss and Tax Credit Carryforward [Line Items]
Credit carryforward	7,145
State Net
Net Operating Loss and Tax Credit Carryforward [Line Items]
Net operating loss carryforward	$ 36,735

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation of Beginning and Ending Balance of Gross Unrecognized Tax Benefit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Income Tax Disclosure [Abstract]
Beginning balance	$ 132,054	$ 124,102
Increases in unrecognized tax benefits related to prior year tax positions	7,205	10,922
Decreases in unrecognized tax benefits related to prior year tax positions	(43,944)	(7,526)
Increases in unrecognized tax benefits related to current year tax positions	13,880	13,232
Decreases in unrecognized tax benefits related to settlements with taxing authorities	(333)	0
Reductions in unrecognized tax benefits due to lapse of applicable statute of limitations	(2,659)	(5,996)
Increases in unrecognized tax benefits acquired	49	976
Changes in unrecognized tax benefits due to foreign currency translation	290	(3,656)
Ending Balance	$ 106,542	$ 132,054

Income Taxes - Taxes - Addition

Income Taxes - Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Taxes [Line Items]
Tax benefit, research, amount		$ 37,100,000	$ 12,400,000
Integration of acquired technologies, tax recognition period		5 years
Integration of acquired technologies, tax amount		$ 37,525,000	33,015,000	$ 4,715,000
Increase in valuation allowance		25,100,000	2,400,000	$ 1,900,000
Tax credit, recognition period				2 months
Unrecognized deferred tax assets	$ 106,500,000	106,500,000
Undistributed foreign earnings	1,143,200,000	1,143,200,000
Tax on deferred undistributed foreign earnings		248,000,000
Increase in gross unrecognized tax benefits		25,500,000
Gross unrecognized tax benefits	106,542,000	106,542,000	132,054,000	$ 124,102,000
Unrecognized tax benefits affecting effective tax rate	106,500,000	106,500,000	129,400,000
The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations		800,000	600,000	500,000
The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations	3,100,000	3,100,000	2,200,000
Deferred tax assets, net, noncurrent	281,926,000	281,926,000	273,909,000
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities		333,000	0
Income taxes paid		69,447,000	59,731,000	40,741,000
California Franchise Tax Board
Taxes [Line Items]
Increase in valuation allowance		25,200,000
California Franchise Tax Board | fiscal year 2009 to 2011
Taxes [Line Items]
Increase in valuation allowance		5,400,000
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities		10,300,000
Decrease in deferred tax assets		4,900,000
Internal Revenue Service (IRS) | Fiscal Year 2015
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities		20,700,000
Tax impact from tax settlements			7,000,000
Internal Revenue Service (IRS) | Fiscal Year 2012
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities				10,000,000
Internal Revenue Service (IRS) | Fiscal Year 2014
Taxes [Line Items]
Tax impact from tax settlements			3,200,000
Internal Revenue Service (IRS) | Fiscal Year 2013
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities				5,500,000
Taiwan | Fiscal Year 2011
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities		700,000
Income taxes paid		300,000
Taiwan | Fiscal Years 2009 and 2010
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities				5,100,000
Tax impact from tax settlements				$ 3,900,000
Taiwan | Fiscal Year 2014
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities			1,200,000
Taiwan | Fiscal Year 2013
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities			1,200,000
Hungary | Fiscal Year 2011 to 2013
Taxes [Line Items]
Proposed tax assessment	$ 47,000,000
Income tax examination, estimate of possible loss, percentage of tax assessment	50.00%
INDIA | Fiscal 2010 to 2015
Taxes [Line Items]
Tax impact from tax settlements		4,600,000
Fiscal Year 2012 | Taiwan
Taxes [Line Items]
Decrease in unrecognized tax benefits resulting from settlement with taxing authorities			1,100,000
Minimum [Member]
Taxes [Line Items]
Estimated potential decrease in underlying unrecognized tax benefits, minimum	$ 0	0
Maximum [Member]
Taxes [Line Items]
Estimated potential decrease in underlying unrecognized tax benefits, minimum	$ 6,000,000	$ 6,000,000
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2015-07
Taxes [Line Items]
Deferred tax assets, net, current			(95,000,000)
Deferred tax assets, net, noncurrent			$ 95,000,000

Other Income (Expense), Net - C

Other Income (Expense), Net - Components of Other Income (expense), Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Other Income and Expenses [Abstract]
Interest income	$ 3,715	$ 2,785	$ 1,302
Interest expense	(3,771)	(2,814)	(1,895)
Gain (loss) on assets related to deferred compensation plan	4,400	3,701	10,856
Foreign currency exchange gain (loss)	156	6,363	1,195
Other, net	7,653	5,109	11,967
Total	$ 12,153	$ 15,144	$ 23,425

Segment Disclosure - Revenues R

Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 633,719	$ 615,204	$ 605,005	$ 568,604	$ 587,159	$ 555,805	$ 557,204	$ 542,043	$ 2,422,532	$ 2,242,211	$ 2,057,472
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,205,880	1,143,816	1,020,654
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									287,381	300,352	272,911
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									239,964	218,794	238,588
Asia-Pacific And Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 689,307	$ 579,249	$ 525,319

Segment Disclosure - Property a

Segment Disclosure - Property and Equipment By Geographic Areas (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Oct. 31, 2015
Long-Lived Assets by Geographical Areas [Line Items]
Property and equipment, net	$ 257,035	$ 263,077
United States
Long-Lived Assets by Geographical Areas [Line Items]
Property and equipment, net	186,854	192,075
Other Countries
Long-Lived Assets by Geographical Areas [Line Items]
Property and equipment, net	$ 70,181	$ 71,002

Segment Disclosure - Additional

Segment Disclosure - Additional information (Detail)	12 Months Ended
	Oct. 31, 2016SegmentCustomer	Oct. 31, 2015SegmentCustomer	Oct. 31, 2014SegmentCustomer
Segment Reporting Information [Line Items]
Number of reportable operating segment | Segment	1	1	1
Number of major customers | Customer	1	1	1
Customer Concentration Risk [Member] | Revenue
Segment Reporting Information [Line Items]
Percentage of revenues contributed by major customers	15.90%	12.80%	10.50%

Supplementary Data - Selected89

Supplementary Data - Selected Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 633,719	$ 615,204	$ 605,005	$ 568,604	$ 587,159	$ 555,805	$ 557,204	$ 542,043	$ 2,422,532	$ 2,242,211	$ 2,057,472
Gross margin	491,508	475,527	473,375	439,160	447,315	426,334	432,232	417,410	1,879,570	1,723,291	1,600,587
Income before provision for income taxes	82,752	85,231	97,223	64,342	55,918	65,193	83,884	76,615	$ 329,548	$ 281,610	$ 272,142
Net income	$ 72,697	$ 64,718	$ 69,376	$ 60,035	$ 49,762	$ 55,387	$ 55,596	$ 65,189
Net income per share
Basic (in USD per share)	$ 0.48	$ 0.43	$ 0.46	$ 0.39	$ 0.32	$ 0.36	$ 0.36	$ 0.42	$ 1.76	$ 1.46	$ 1.67
Diluted (in USD per share)	$ 0.47	$ 0.42	$ 0.45	$ 0.39	$ 0.31	$ 0.35	$ 0.35	$ 0.41	$ 1.73	$ 1.43	$ 1.64