Salesforce (CRM) 10-K 7 Mar 16 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) shares in Millions, $ in Billions	12 Months Ended
	Jan. 31, 2016	Jul. 31, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	CRM
Entity Registrant Name	SALESFORCE COM INC
Entity Central Index Key	1,108,524
Current Fiscal Year End Date	--01-31
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	670.9
Entity Public Float		$ 32.9

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,158,363	$ 908,117
Short-term marketable securities	183,018	87,312
Accounts receivable, net of allowance for doubtful accounts of $10,488 and $8,146 at January 31, 2016 and 2015, respectively	2,496,165	1,905,506
Deferred commissions	259,187	225,386
Prepaid expenses and other current assets	250,594	245,026
Land and building improvements held for sale	0	143,197
Total current assets	4,347,327	3,514,544
Marketable securities, noncurrent	1,383,996	894,855
Property and equipment, net	1,715,828	1,125,866
Deferred commissions, noncurrent	189,943	162,796
Capitalized software, net	384,258	433,398
Goodwill	3,849,937	3,782,660
Strategic investments	520,721	175,774
Other assets, net	378,762	460,219
Restricted cash	0	115,015
Total assets	12,770,772	10,665,127
Current liabilities:
Accounts payable, accrued expenses and other liabilities	1,349,338	1,103,335
Deferred revenue	4,267,667	3,286,768
Total current liabilities	5,617,005	4,390,103
Convertible 0.25% senior notes, net	1,095,059	1,070,692
Loan assumed on 50 Fremont	198,888	0
Revolving credit facility	0	300,000
Deferred revenue, noncurrent	23,886	34,681
Other noncurrent liabilities	833,065	894,468
Total liabilities	7,767,903	6,689,944
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000 shares authorized and none issued and outstanding	0	0
Common stock, $0.001 par value; 1,600,000 shares authorized, 670,929 and 650,596 issued and outstanding at January 31, 2016 and 2015, respectively	671	651
Additional paid-in capital	5,705,386	4,604,485
Accumulated other comprehensive loss	(49,917)	(24,108)
Accumulated deficit	(653,271)	(605,845)
Total stockholders’ equity	5,002,869	3,975,183
Total liabilities and stockholders’ equity	$ 12,770,772	$ 10,665,127

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Accounts receivable, allowance for doubtful accounts	$ 10,488	$ 8,146
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	1,600,000,000	1,600,000,000
Common stock, issued (in shares)	670,929,000	650,596,000
Common stock, outstanding (in shares)	670,929,000	650,596,000
Notes Payable to Banks [Member] | 0.25% Convertible Senior Notes due April 1, 2018
Interest percentage of convertible senior notes	0.25%	0.25%

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Revenues:
Subscription and support		$ 6,205,599	$ 5,013,764	$ 3,824,542
Professional services and other		461,617	359,822	246,461
Total revenues		6,667,216	5,373,586	4,071,003
Cost of revenues:
Subscription and support	[1],[2]	1,188,967	924,638	711,880
Professional services and other	[1],[2]	465,581	364,632	256,548
Total cost of revenues	[1],[2]	1,654,548	1,289,270	968,428
Gross profit		5,012,668	4,084,316	3,102,575
Operating expenses:
Research and development	[1],[2]	946,300	792,917	623,798
Marketing and sales	[1],[2]	3,239,824	2,757,096	2,168,132
General and administrative	[1],[2]	748,238	679,936	596,719
Operating lease termination resulting from purchase of 50 Fremont	[1],[2]	(36,617)	0	0
Total operating expenses	[1],[2]	4,897,745	4,229,949	3,388,649
Income (loss) from operations		114,923	(145,633)	(286,074)
Investment income		15,341	10,038	10,218
Interest expense		(72,485)	(73,237)	(77,211)
Other expense	[1],[3]	(15,292)	(19,878)	(4,868)
Gain on sales of land and building improvements		21,792	15,625	0
Income (loss) before benefit from (provision for) income taxes		64,279	(213,085)	(357,935)
Benefit from (provision for) income taxes		(111,705)	(49,603)	125,760
Net loss		$ (47,426)	$ (262,688)	$ (232,175)
Basic net loss per share (in dollars per share)		$ (0.07)	$ (0.42)	$ (0.39)
Diluted net loss per share (in dollars per share)		$ (0.07)	$ (0.42)	$ (0.39)
Shares used in computing basic net loss per share (in shares)		661,647	624,148	597,613
Shares used in computing diluted net loss per share (in shares)		661,647	624,148	597,613
[1]	Amounts include amortization of purchased intangibles from business combinations, as follows: Fiscal Year Ended January 31, 2016 2015 2014Cost of revenues $80,918 $90,300 $109,356Marketing and sales 77,152 64,673 37,179Other non-operating expense 3,636 0 0
[2]	Amounts include stock-based expenses, as follows: Fiscal Year Ended January 31, 2016 2015 2014Cost of revenues $69,443 $53,812 $45,608Research and development 129,434 121,193 107,420Marketing and sales 289,152 286,410 258,571General and administrative 105,599 103,350 91,681
[3]	Amount includes approximately $10.3 million loss on conversions of our convertible 0.75% senior notes due January 2015 recognized during fiscal 2015.

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Stock-based expenses	$ 593,628	$ 564,765	$ 503,280
Loss on conversions of convertible senior notes	0	$ 10,326	214
0.75% Convertible Senior Notes due January 15, 2015 | Notes Payable to Banks [Member]
Interest percentage of convertible senior notes		0.75%
Cost of revenues
Amortization of purchased intangibles from business combinations	80,918	$ 90,300	109,356
Stock-based expenses	69,443	53,812	45,608
Marketing and sales
Amortization of purchased intangibles from business combinations	77,152	64,673	37,179
Stock-based expenses	289,152	286,410	258,571
Research and development
Stock-based expenses	129,434	121,193	107,420
General and administrative
Stock-based expenses	105,599	103,350	91,681
Other Non-Operating Expense [Member]
Amortization of purchased intangibles from business combinations	$ 3,636	$ 0	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (47,426)	$ (262,688)	$ (232,175)
Other comprehensive income (loss), before tax and net of reclassification adjustments:
Foreign currency translation and other losses	(16,616)	(43,276)	(4,930)
Unrealized gains (losses) on investments	(9,193)	1,488	8,120
Other comprehensive income (loss), before tax	(25,809)	(41,788)	3,190
Tax effect	0	0	(2,647)
Other comprehensive income (loss), net of tax	(25,809)	(41,788)	543
Comprehensive loss	$ (73,235)	$ (304,476)	$ (231,632)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income/(Loss)	Accumulated Deficit
Beginning balance (in shares) at Jan. 31, 2013		585,627,000
Beginning balance at Jan. 31, 2013	$ 2,317,633	$ 586	$ 2,410,892	$ 17,137	$ (110,982)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and stock grants to board members for board services (in shares)		9,952,000
Exercise of stock options and stock grants to board members for board services	197,022	$ 10	197,012
Vested restricted stock units converted to shares (in shares)		9,265,000
Vested restricted stock units converted to shares	9	$ 9	0
Shares issued related to business combinations (in shares)		2,367,000
Shares issued related to business combinations	81,193	$ 2	81,191
Shares issued under employee stock plans (in shares)		2,932,000
Shares issued under employee stock plans	92,485	$ 3	92,482
Tax benefits from employee stock plans	8,048		8,048
Stock-based expenses	494,615		494,615
Temporary equity reclassification	26,907		26,907
Equity component of the convertible notes issuance, net	121,230		121,230
Purchase of convertible note hedges	(153,800)		(153,800)
Issuance of warrants	84,800		84,800
Other comprehensive income, net of tax	543			543
Net loss	(232,175)				(232,175)
Ending balance (in shares) at Jan. 31, 2014		610,143,000
Ending balance at Jan. 31, 2014	3,038,510	$ 610	3,363,377	17,680	(343,157)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and stock grants to board members for board services (in shares)		7,413,000
Exercise of stock options and stock grants to board members for board services	182,278	$ 8	182,270
Vested restricted stock units converted to shares (in shares)		9,259,000
Vested restricted stock units converted to shares	9	$ 9
Shares issued related to business combinations (in shares)		7,185,000
Shares issued related to business combinations	339,083	$ 7	339,076
Shares issued under employee stock plans (in shares)		3,264,000
Shares issued under employee stock plans	127,820	$ 4	127,816
Tax benefits from employee stock plans	7,730		7,730
Settlement of 0.75% convertible notes and related warrants	22,749	$ 13	22,736
Settlement of 0.75% convertible notes and related warrants (in shares)		13,332,000
Stock-based expenses	561,480		561,480
Other comprehensive income, net of tax	(41,788)			(41,788)
Net loss	(262,688)				(262,688)
Ending balance (in shares) at Jan. 31, 2015		650,596,000
Ending balance at Jan. 31, 2015	$ 3,975,183	$ 651	4,604,485	(24,108)	(605,845)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and stock grants to board members for board services (in shares)	8,188,987	8,278,000
Exercise of stock options and stock grants to board members for board services	$ 296,501	$ 8	296,493
Vested restricted stock units converted to shares (in shares)		8,933,000
Vested restricted stock units converted to shares	9	$ 9
Shares issued related to business combinations (in shares)		117,000
Shares issued related to business combinations	0	$ 0	0
Shares issued under employee stock plans (in shares)		3,005,000
Shares issued under employee stock plans	154,960	$ 3	154,957
Tax benefits from employee stock plans	59,496		59,496
Stock-based expenses	589,955		589,955
Other comprehensive income, net of tax	(25,809)			(25,809)
Net loss	(47,426)				(47,426)
Ending balance (in shares) at Jan. 31, 2016		670,929,000
Ending balance at Jan. 31, 2016	$ 5,002,869	$ 671	$ 5,705,386	$ (49,917)	$ (653,271)

Consolidated Statements of Sto8

Consolidated Statements of Stockholders’ Equity (Parenthetical)	Jan. 31, 2016
Additional Paid-in Capital
Interest percentage of convertible senior notes	0.75%

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Operating activities:
Net loss		$ (47,426)	$ (262,688)	$ (232,175)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization		525,750	448,296	369,423
Amortization of debt discount and transaction costs		27,467	39,620	49,582
Gain on sales of land and building improvements		(21,792)	(15,625)	0
50 Fremont lease termination	[1],[2]	(36,617)	0	0
Loss on conversions of convertible senior notes		0	10,326	214
Amortization of deferred commissions		319,074	257,642	194,553
Expenses related to employee stock plans		593,628	564,765	503,280
Excess tax benefits from employee stock plans		(59,496)	(7,730)	(8,144)
Changes in assets and liabilities, net of business combinations:
Accounts receivable, net		(582,425)	(544,610)	(424,702)
Deferred commissions		(380,022)	(320,904)	(265,080)
Prepaid expenses and other current assets and other assets		50,772	45,819	105,218
Accounts payable, accrued expenses and other liabilities		253,986	159,973	(29,043)
Deferred revenue		969,686	798,830	612,343
Net cash provided by operating activities		1,612,585	1,173,714	875,469
Investing activities:
Business combinations, net of cash acquired		(58,680)	38,071	(2,617,302)
Proceeds from land and building improvements held for sale		127,066	223,240	0
Purchase of 50 Fremont land and building		(425,376)	0	0
Deposit and withdrawal for purchase of 50 Fremont land and building		115,015	(126,435)	0
Non-refundable amounts received for sale of land and building		6,284	0	0
Strategic investments		(366,519)	(93,725)	(31,160)
Purchases of marketable securities		(1,139,267)	(780,540)	(558,703)
Sales of marketable securities		500,264	243,845	1,038,284
Maturities of marketable securities		37,811	87,638	36,436
Capital expenditures		(284,476)	(290,454)	(299,110)
Net cash used in investing activities		(1,487,878)	(698,360)	(2,431,555)
Financing activities:
Proceeds from borrowings on convertible senior notes, net		0	0	1,132,750
Proceeds from issuance of warrants		0	0	84,800
Purchase of convertible note hedge		0	0	(153,800)
Proceeds from (payments on) revolving credit facility, net		(300,000)	297,325	0
Proceeds from (payments on) term loan, net		0	(285,000)	283,500
Proceeds from employee stock plans		455,482	308,989	289,931
Excess tax benefits from employee stock plans		59,496	7,730	8,144
Payments on convertible senior notes		0	(568,862)	(5,992)
Principal payments on capital lease obligations		(82,330)	(70,663)	(41,099)
Net cash provided by (used in) financing activities		132,648	(310,481)	1,598,234
Effect of exchange rate changes		(7,109)	(38,391)	(7,758)
Net increase in cash and cash equivalents		250,246	126,482	34,390
Cash and cash equivalents, beginning of period		908,117	781,635	747,245
Cash and cash equivalents, end of period		1,158,363	908,117	781,635
Cash paid during the period for:
Interest		37,954	24,684	21,503
Income taxes, net of tax refunds		31,462	36,219	28,870
Non-cash financing and investing activities:
Fixed assets acquired under capital leases		12,948	124,099	492,810
Building in progress - leased facility acquired under financing obligation		77,057	85,118	40,171
Fair value of equity awards assumed		$ 0	$ 1,050	$ 19,037
Fair value of common stock issued as consideration for business combinations		0	338,033	69,533
Fair value of loan assumed on 50 Fremont		$ 198,751	$ 0	$ 0
[1]	Amounts include amortization of purchased intangibles from business combinations, as follows: Fiscal Year Ended January 31, 2016 2015 2014Cost of revenues $80,918 $90,300 $109,356Marketing and sales 77,152 64,673 37,179Other non-operating expense 3,636 0 0
[2]	Amounts include stock-based expenses, as follows: Fiscal Year Ended January 31, 2016 2015 2014Cost of revenues $69,443 $53,812 $45,608Research and development 129,434 121,193 107,420Marketing and sales 289,152 286,410 258,571General and administrative 105,599 103,350 91,681

Summary of Business and Signifi

Summary of Business and Significant Accounting Policies	12 Months Ended
	Jan. 31, 2016
Accounting Policies [Abstract]
Summary of Business and Significant Accounting Policies	Summary of Business and Significant Accounting Policies Description of Business Salesforce.com, inc. (the “Company”) is a leading provider of enterprise cloud computing solutions, with a focus on customer relationship management, or CRM. The Company introduced its first CRM solution in February 2000, and has since expanded its service offerings with new editions, solutions, features and platform capabilities. The Company's mission is to help its customers transform themselves into customer-centric companies by empowering them to connect with their customers in entirely new ways. The Company's Customer Success Platform, including sales force automation, customer service and support, marketing automation, community management, analytics, application development, Internet of Things integration and the Company's professional cloud services, provide the next-generation platform of enterprise applications and services to enable customer success. Fiscal Year The Company’s fiscal year ends on January 31. References to fiscal 2016, for example, refer to the fiscal year ending January 31, 2016 . Basis of Presentation On March 20, 2013, the Company’s certificate of incorporation was amended to increase the number of authorized shares of common stock from 400.0 million to 1.6 billion in order to provide for a four -for-one stock split of the common stock effected in the form of a stock dividend. The record date for the stock split was April 3, 2013, and the additional shares were distributed on April 17, 2013. Each stockholder of record on the close of business on the record date received three additional shares of common stock for each share held. All share and per share data presented herein reflect the impact of the increase in authorized shares and the stock split, as appropriate. Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions in the Company’s consolidated financial statements and notes thereto. Significant estimates and assumptions made by management include the determination of: • the best estimate of selling price of the deliverables included in multiple deliverable revenue arrangements, • the fair value of assets acquired and liabilities assumed for business combinations, • the recognition, measurement and valuation of current and deferred income taxes, • the fair value of convertible notes, • the fair value of stock awards issued and related forfeiture rates, • the useful lives of intangible assets, property and equipment and building and structural components, and • the valuation of strategic investments and the determination of other-than-temporary impairments. Actual results could differ materially from those estimates. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the result of which forms the basis for making judgments about the carrying values of assets and liabilities. Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Segments The Company operates as one operating segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker, who is the chief executive officer, in deciding how to allocate resources and assessing performance. Over the past few years, the Company has completed several acquisitions. These acquisitions have allowed the Company to expand its offerings, presence and reach in various market segments of the enterprise cloud computing market. While the Company has offerings in multiple enterprise cloud computing market segments, the Company’s business operates in one operating segment because all of the Company's offerings operate on a single platform and are deployed in an identical way, and the Company’s chief operating decision maker evaluates the Company’s financial information and resources and assesses the performance of these resources on a consolidated basis. Since the Company operates in one operating segment, all required financial segment information can be found in the consolidated financial statements. Concentrations of Credit Risk and Significant Customers The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities and trade accounts receivable. Although the Company deposits its cash with multiple financial institutions, its deposits, at times, may exceed federally insured limits. Collateral is not required for accounts receivable. The Company maintains an allowance for doubtful accounts receivable balances. This allowance is based upon historical loss patterns, the number of days that billings are past due and an evaluation of the potential risk of loss associated with delinquent accounts. No single customer accounted for more than five percent of accounts receivable at January 31, 2016 and 2015 . No single customer accounted for five percent or more of total revenue during fiscal 2016 , 2015 and 2014 . Geographic Locations As of January 31, 2016 and 2015 , assets located outside the Americas were 11 percent and 12 percent of total assets, respectively. Revenues by geographical region are as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Americas $ 4,910,745 $ 3,868,329 $ 2,899,837 Europe 1,162,808 984,919 741,220 Asia Pacific 593,663 520,338 429,946 $ 6,667,216 $ 5,373,586 $ 4,071,003 Americas revenue attributed to the United States was approximately 95 percent , 94 percent and 96 percent in fiscal 2016 , 2015 and 2014 , respectively. No other country represented more than ten percent of total revenue during fiscal 2016 , 2015 or 2014 . Revenue Recognition The Company derives its revenues from two sources: (1) subscription revenues, which are comprised of subscription fees from customers accessing the Company’s enterprise cloud computing services and from customers paying for additional support beyond the standard support that is included in the basic subscription fees; and (2) related professional services such as process mapping, project management, implementation services and other revenue. “Other revenue” consists primarily of training fees. The Company commences revenue recognition when all of the following conditions are satisfied: • there is persuasive evidence of an arrangement; • the service has been or is being provided to the customer; • the collection of the fees is reasonably assured; and • the amount of fees to be paid by the customer is fixed or determinable. The Company’s subscription service arrangements are non-cancelable and do not contain refund-type provisions. Subscription and Support Revenues Subscription and support revenues are recognized ratably over the contract terms beginning on the commencement date of each contract, which is the date the Company’s service is made available to customers. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. Professional Services and Other Revenues The majority of the Company’s professional services contracts are on a time and material basis. When these services are not combined with subscription revenues as a single unit of accounting, as discussed below, these revenues are recognized as the services are rendered for time and material contracts, and when the milestones are achieved and accepted by the customer for fixed price contracts. Training revenues are recognized as the services are performed. Multiple Deliverable Arrangements The Company enters into arrangements with multiple deliverables that generally include multiple subscriptions, premium support and professional services. If the deliverables have standalone value upon delivery, the Company accounts for each deliverable separately. Subscription services have standalone value as such services are often sold separately. In determining whether professional services have standalone value, the Company considers the following factors for each professional services agreement: availability of the services from other vendors, the nature of the professional services, the timing of when the professional services contract was signed in comparison to the subscription service start date and the contractual dependence of the subscription service on the customer’s satisfaction with the professional services work. To date, the Company has concluded that all of the professional services included in multiple deliverable arrangements executed have standalone value. Multiple deliverables included in an arrangement are separated into different units of accounting and the arrangement consideration is allocated to the identified separate units based on a relative selling price hierarchy. The Company determines the relative selling price for a deliverable based on its vendor-specific objective evidence of selling price (“VSOE”), if available, or its best estimate of selling price (“BESP”), if VSOE is not available. The Company has determined that third-party evidence of selling price (“TPE”) is not a practical alternative due to differences in its service offerings compared to other parties and the availability of relevant third-party pricing information. The amount of revenue allocated to delivered items is limited by contingent revenue, if any. For certain professional services, the Company has established VSOE as a consistent number of standalone sales of these deliverables have been priced within a reasonably narrow range. The Company has not established VSOE for its subscription services due to lack of pricing consistency, the introduction of new services and other factors. Accordingly, the Company uses its BESP to determine the relative selling price for its subscription services. The Company determines BESP by considering its overall pricing objectives and market conditions. Significant pricing practices taken into consideration include the Company’s discounting practices, the size and volume of the Company’s transactions, the customer demographic, the geographic area where services are sold, price lists, its go-to-market strategy, historical standalone sales and contract prices. The determination of BESP is made through consultation with and approval by the Company’s management, taking into consideration the go-to-market strategy. As the Company’s go-to-market strategies evolve, the Company may modify its pricing practices in the future, which could result in changes in relative selling prices, including both VSOE and BESP. Deferred Revenue The deferred revenue balance does not represent the total contract value of annual or multi-year, non-cancelable subscription agreements. Deferred revenue primarily consists of billings or payments received in advance of revenue recognition from subscription services described above and is recognized as the revenue recognition criteria are met. The Company generally invoices customers in annual installments. The deferred revenue balance is influenced by several factors, including seasonality, the compounding effects of renewals, invoice duration, invoice timing, size and new business linearity within the quarter. Deferred revenue that will be recognized during the succeeding twelve month period is recorded as current deferred revenue and the remaining portion is recorded as noncurrent. Deferred Commissions Deferred commissions are the incremental costs that are directly associated with non-cancelable subscription contracts with customers and consist of sales commissions paid to the Company’s direct sales force. The commissions are deferred and amortized over the non-cancelable terms of the related customer contracts, which are typically 12 to 36 months . The commission payments are paid in full the month after the customer’s service commences. The deferred commission amounts are recoverable through the future revenue streams under the non-cancelable customer contracts. The Company believes this is the preferable method of accounting as the commission charges are so closely related to the revenue from the non-cancelable customer contracts that they should be recorded as an asset and charged to expense over the same period that the subscription revenue is recognized. Amortization of deferred commissions is included in marketing and sales expense in the accompanying consolidated statements of operations. Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash and cash equivalents are stated at fair value. Marketable Securities Management determines the appropriate classification of marketable securities at the time of purchase and reevaluates such determination at each balance sheet date. Securities are classified as available for sale and are carried at fair value, with the change in unrealized gains and losses, net of tax, reported as a separate component on the consolidated statements of comprehensive loss. Fair value is determined based on quoted market rates when observable or utilizing data points that are observable, such as quoted prices, interest rates and yield curves. Declines in fair value judged to be other-than-temporary on securities available for sale are included as a component of investment income. In order to determine whether a decline in value is other-than-temporary, the Company evaluates, among other factors: the duration and extent to which the fair value has been less than the carrying value and its intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of securities sold is based on the specific-identification method. Interest on securities classified as available for sale is also included as a component of investment income. Fair Value Measurement The Company measures its cash equivalents, marketable securities and foreign currency derivative contracts at fair value. The additional disclosures regarding the Company’s fair value measurements are included in Note 2 “Investments”. Property and Equipment Property and equipment are stated at cost. Depreciation is calculated on a straight-line basis over the estimated useful lives of those assets as follows: Computer, equipment and software 3 to 9 years Furniture and fixtures 5 years Leasehold improvements Shorter of the estimated lease term or 10 years Building and structural components Average weighted useful life of 32 years Building improvements 10 years When assets are retired or otherwise disposed of, the cost and accumulated depreciation and amortization are removed from their respective accounts and any loss on such retirement is reflected in operating expenses. Capitalized Internal-Use Software Costs The Company capitalizes costs related to its enterprise cloud computing services and certain projects for internal use incurred during the application development stage. Costs related to preliminary project activities and post implementation activities are expensed as incurred. Internal-use software is amortized on a straight-line basis over its estimated useful life, which is generally three to five years. Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. Goodwill and Intangible Assets Impairment Assessments The Company evaluates and tests the recoverability of its goodwill for impairment at least annually during the fourth quarter or more often if and when circumstances indicate that goodwill may not be recoverable. Intangible assets are amortized over their useful lives. Each period the Company evaluates the estimated remaining useful life of its intangible assets and whether events or changes in circumstances warrant a revision to the remaining period of amortization. The carrying amounts of these assets are periodically reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. Recoverability of these assets is measured by comparison of the carrying amount of each asset to the future undiscounted cash flows the asset is expected to generate. If the undiscounted cash flows used in the test for recoverability are less than the carrying amount of these assets, then the carrying amount of such assets is reduced to fair value. Long- Lived Assets and Impairment Assessment The Company evaluates long-lived assets for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. This includes but is not limited to significant adverse changes in business climate, market conditions, or other events that indicate an asset's carrying amount may not be recoverable. If such review indicates that the carrying amount of long-lived assets is not recoverable, the carrying amount of such assets is reduced to fair value. There was no impairment of long-lived assets during fiscal 2016 , 2015 or 2014 . Business Combinations The Company uses its best estimates and assumptions to accurately assign fair value to the tangible and intangible assets acquired and liabilities assumed at the acquisition date. The Company’s estimates are inherently uncertain and subject to refinement. During the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed, with the corresponding offset to goodwill. In addition, uncertain tax positions and tax-related valuation allowances are initially established in connection with a business combination as of the acquisition date. The Company continues to collect information and reevaluates these estimates and assumptions quarterly and records any adjustments to the Company’s preliminary estimates to goodwill provided that the Company is within the measurement period. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company’s consolidated statements of operations. Leases and Asset Retirement Obligations The Company categorizes leases at their inception as either operating or capital leases. In certain lease agreements, the Company may receive rent holidays and other incentives. The Company recognizes lease costs on a straight-line basis once control of the space is achieved, without regard to deferred payment terms such as rent holidays that defer the commencement date of required payments. Additionally, incentives received are treated as a reduction of costs over the term of the agreement. The Company establishes assets and liabilities for the present value of estimated future costs to retire long-lived assets at the termination or expiration of a lease. Such assets are depreciated over the lease period into operating expense, and the recorded liabilities are accreted to the future value of the estimated retirement costs. The Company records assets and liabilities for the estimated construction costs incurred under build-to-suit lease arrangements to the extent it is involved in the construction of structural improvements or takes construction risk prior to commencement of a lease. Accounting for Stock-Based Expense The Company recognizes stock-based expenses related to stock options and restricted stock awards on a straight-line basis over the requisite service period of the awards, which is generally the vesting term of four years . The aggregate stock compensation remaining to be amortized to costs and expenses will be recognized over a weighted average period of 2.0 years . The Company recognizes stock-based expenses related to shares issued pursuant to its 2004 Employee Stock Purchase Plan (“ESPP”) on a straight-line basis over the offering period, which is 12 months . Stock-based expenses are recognized net of estimated forfeiture activity. The estimated forfeiture rate applied is based on historical forfeiture rates. The Company does not anticipate paying any cash dividends in the foreseeable future and therefore uses an expected dividend yield of zero in the option pricing model. The fair value of each stock option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions and fair value per share: Fiscal Year Ended January 31, Stock Options 2016 2015 2014 Volatility 32-37 % 37 % 37-43 % Estimated life 3.5 years 3.6 years 3.4 years Risk-free interest rate 1.09-1.42 % 1.12-1.53 % 0.48-1.21 % Weighted-average fair value per share of grants $ 20.22 $ 17.20 $ 14.08 Fiscal Year Ended January 31, ESPP 2016 2015 2014 Volatility 30-34 % 32-35 % 31-35 % Estimated life 0.75 years 0.75 years 0.75 years Risk-free interest rate 0.06-0.76 % 0.07-0.23 % 0.07-0.10 % Weighted-average fair value per share of grants $ 19.49 $ 14.56 $ 10.30 The Company estimated its future stock price volatility considering both its observed option-implied volatilities and its historical volatility calculations. Management believes this is the best estimate of the expected volatility over the expected life of its stock options and stock purchase rights. The estimated life for the stock options was based on an analysis of historical exercise activity. The estimated life of the ESPP was based on the two purchase periods within each offering period. The risk-free interest rate is based on the rate for a U.S. government security with the same estimated life at the time of the option grant and the stock purchase rights. Advertising Expenses Advertising is expensed as incurred. Advertising expense was $315.6 million , $203.6 million and $155.8 million for fiscal 2016 , 2015 and 2014 , respectively. Income Taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on temporary differences between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax laws is recognized in the consolidated statement of operations in the period that includes the enactment date. The Company’s tax positions are subject to income tax audits by multiple tax jurisdictions throughout the world. The Company recognizes the tax benefit of an uncertain tax position only if it is more likely than not that the position is sustainable upon examination by the taxing authority, solely based on its technical merits. The tax benefit recognized is measured as the largest amount of benefit which is greater than 50 percent likely to be realized upon settlement with the taxing authority. The Company recognizes interest accrued and penalties related to unrecognized tax benefits in the income tax provision. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts that are more likely than not expected to be realized based on the weighting of positive and negative evidence. Future realization of deferred tax assets ultimately depends on the existence of sufficient taxable income of the appropriate character (for example, ordinary income or capital gain) within the carryback or carryforward periods available under the applicable tax law. The Company regularly reviews the deferred tax assets for recoverability based on historical taxable income, projected future taxable income, the expected timing of the reversals of existing temporary differences and tax planning strategies. The Company’s judgments regarding future profitability may change due to many factors, including future market conditions and the ability to successfully execute its business plans and/or tax planning strategies. Should there be a change in the ability to recover deferred tax assets, the tax provision would increase or decrease in the period in which the assessment is changed. Foreign Currency Translation The functional currency of the Company’s major foreign subsidiaries is generally the local currency. Adjustments resulting from translating foreign functional currency financial statements into U.S. dollars are recorded as a separate component on the consolidated statements of comprehensive loss. Foreign currency transaction gains and losses are included in net loss for the period. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenues and expenses are translated at the average exchange rate during the period. Equity transactions are translated using historical exchange rates. Warranties and Indemnification The Company’s enterprise cloud computing services are typically warranted to perform in a manner consistent with general industry standards that are reasonably applicable and materially in accordance with the Company’s online help documentation under normal use and circumstances. The Company’s arrangements generally include certain provisions for indemnifying customers against liabilities if its products or services infringe a third party’s intellectual property rights. To date, the Company has not incurred any material costs as a result of such obligations and has not accrued any liabilities related to such obligations in the accompanying consolidated financial statements. The Company has also agreed to indemnify its directors and executive officers for costs associated with any fees, expenses, judgments, fines and settlement amounts incurred by any of these persons in any action or proceeding to which any of those persons is, or is threatened to be, made a party by reason of the person’s service as a director or officer, including any action by the Company, arising out of that person’s services as the Company’s director or officer or that person’s services provided to any other company or enterprise at the Company’s request. The Company maintains director and officer insurance coverage that would generally enable the Company to recover a portion of any future amounts paid. The Company may also be subject to indemnification obligations by law with respect to the actions of its employees under certain circumstances and in certain jurisdictions. New Accounting Pronouncements In May 2014 , the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”) which amended the existing FASB Accounting Standards Codification. This standard establishes a principle for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. The standard also provides guidance on the recognition of costs related to obtaining and fulfilling customer contracts. The FASB deferred the effective date for the new revenue reporting standard for entities reporting under U.S. GAAP for one year. In accordance with the deferral, ASU 2014-09 will be effective for fiscal 2019 , including interim periods within that reporting period. The Company is currently in the process of assessing the adoption methodology, which allows the amendment to be applied retrospectively to each prior period presented, or with the cumulative effect recognized as of the date of initial application. The Company is also evaluating the impact of the adoption of ASU 2014-09 on its condensed consolidated financial statements and has not determined whether the effect will be material to either its revenue results or its deferred commissions balances. In September 2015, the FASB issued Accounting Standards Update No. 2015-16, “Simplifying the Accounting for Measurement-Period Adjustments (Topic 805)” (“ASU 2015-16”) which eliminates the requirement to restate prior period financial statements for measurement period adjustments in business combinations. ASU 2015-16 requires that the cumulative impact of a measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified. The new standard is effective for interim and annual periods beginning after December 15, 2015 and early adoption is permitted. The Company is evaluating the impact of the adoption of ASU 2015-16 on its consolidated financial statements. In November 2015, the FASB issued Accounting Standards Update No. 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes” (“ASU 2015-17”) which requires all deferred income taxes to be classified as noncurrent on the balance sheet. The amendments would be effective for annual periods beginning after December 15, 2016. The Company early adopted this standard retrospectively for all prior periods and reclassified all current deferred tax assets and liabilities to noncurrent deferred tax assets and liabilities on the consolidated balance sheets for all periods presented. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”), which requires lessees to put most leases on their balance sheets but recognize the expenses on their income statements in a manner similar to current practice. ASU 2016-02 states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. The new standard is effective for interim and annual periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating the impact to its consolidated financial statements. Reclassifications Certain reclassifications to the fiscal 2015 balances were made to conform to the current period presentation in the Balance Sheet. These reclassifications include strategic investments and other assets, net.

Investments

Investments	12 Months Ended
	Jan. 31, 2016
Investments Schedule [Abstract]
Investments	Investments Marketable Securities At January 31, 2016 , marketable securities consisted of the following (in thousands): Investments classified as Marketable Securities Amortized Cost Unrealized Gains Unrealized Losses Fair Value Corporate notes and obligations $ 949,266 $ 1,398 $ (2,983 ) $ 947,681 U.S. treasury securities 157,625 375 (56 ) 157,944 Mortgage backed obligations 104,242 106 (323 ) 104,025 Asset backed securities 271,292 186 (226 ) 271,252 Municipal securities 44,934 209 (6 ) 45,137 Foreign government obligations 18,014 42 (5 ) 18,051 U.S. agency obligations 16,076 16 (6 ) 16,086 Covered bonds 6,690 148 0 6,838 Total marketable securities $ 1,568,139 $ 2,480 $ (3,605 ) $ 1,567,014 At January 31, 2015 , marketable securities consisted of the following (in thousands): Investments classified as Marketable Securities Amortized Cost Unrealized Gains Unrealized Losses Fair Value Corporate notes and obligations $ 605,724 $ 3,031 $ (481 ) $ 608,274 U.S. treasury securities 73,226 257 (1 ) 73,482 Mortgage backed obligations 44,181 159 (415 ) 43,925 Asset backed securities 120,049 131 (43 ) 120,137 Municipal securities 36,447 115 (25 ) 36,537 Foreign government obligations 12,023 278 0 12,301 U.S. agency obligations 19,488 26 (4 ) 19,510 Covered bonds 66,816 1,185 0 68,001 Total marketable securities $ 977,954 $ 5,182 $ (969 ) $ 982,167 The duration of the investments classified as marketable securities is as follows (in thousands): As of January 31, January 31, Recorded as follows: Short-term (due in one year or less) $ 183,018 $ 87,312 Long-term (due after one year) 1,383,996 894,855 $ 1,567,014 $ 982,167 As of January 31, 2016 , the following marketable securities were in an unrealized loss position (in thousands): Less than 12 Months 12 Months or Greater Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate notes and obligations $ 531,258 $ (2,472 ) $ 48,047 $ (511 ) $ 579,305 $ (2,983 ) U.S. treasury securities 50,434 (56 ) 0 0 50,434 (56 ) Mortgage backed obligations 61,055 (274 ) 4,780 (49 ) 65,835 (323 ) Asset backed securities 135,917 (199 ) 5,490 (27 ) 141,407 (226 ) Municipal securities 4,553 (4 ) 1,959 (2 ) 6,512 (6 ) U.S. agency obligations 5,989 (6 ) 0 0 5,989 (6 ) Foreign government obligations 5,523 (5 ) 0 0 5,523 (5 ) $ 794,729 $ (3,016 ) $ 60,276 $ (589 ) $ 855,005 $ (3,605 ) The unrealized loss for each individual fixed rate marketable securities was less than $115,000 . The Company does not believe any of the unrealized losses represent an other-than-temporary impairment based on its evaluation of available evidence as of January 31, 2016 . The Company expects to receive the full principal and interest on all of these marketable securities. Fair Value Measurement All of the Company’s cash equivalents, marketable securities and foreign currency derivative contracts are classified within Level 1 or Level 2 because the Company’s cash equivalents, marketable securities and foreign currency derivative contracts are valued using quoted market prices or alternative pricing sources and models utilizing observable market inputs. The Company uses a three-tier fair value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value: Level 1. Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2. Other inputs that are directly or indirectly observable in the marketplace. Level 3. Unobservable inputs which are supported by little or no market activity. The following table presents information about the Company’s assets and liabilities that are measured at fair value as of January 31, 2016 and indicates the fair value hierarchy of the valuation (in thousands): Description Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balances as of January 31, 2016 Cash equivalents (1): Time deposits $ 0 $ 236,798 $ 0 $ 236,798 Money market mutual funds 216,107 0 0 216,107 Commercial Paper 0 159,230 0 159,230 Agency and sovereign paper 0 13,599 0 13,599 Marketable securities: Corporate notes and obligations 0 947,681 0 947,681 U.S. treasury securities 0 157,944 0 157,944 Mortgage backed obligations 0 104,025 0 104,025 Asset backed securities 0 271,252 0 271,252 Municipal securities 0 45,137 0 45,137 Foreign government obligations 0 18,051 0 18,051 U.S. agency obligations 0 16,086 0 16,086 Covered bonds 0 6,838 0 6,838 Foreign currency derivative contracts (2) 0 4,731 0 4,731 Total Assets $ 216,107 $ 1,981,372 $ 0 $ 2,197,479 Liabilities Foreign currency derivative contracts (3) $ 0 $ 14,025 $ 0 $ 14,025 Total Liabilities $ 0 $ 14,025 $ 0 $ 14,025 _____________ (1) Included in “cash and cash equivalents” in the accompanying consolidated balance sheet as of January 31, 2016 , in addition to $532.6 million of cash. (2) Included in “prepaid expenses and other current assets” in the accompanying consolidated balance sheet as of January 31, 2016 . (3) Included in “accounts payable, accrued expenses and other liabilities” in the consolidated balance sheet as of January 31, 2016 . The following table presents information about the Company’s assets and liabilities that are measured at fair value as of January 31, 2015 and indicates the fair value hierarchy of the valuation (in thousands): Description Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balances as of January 31, 2015 Cash equivalents (1): Time deposits $ 0 $ 292,487 $ 0 $ 292,487 Money market mutual funds 13,983 0 0 13,983 Marketable securities: Corporate notes and obligations 0 608,274 0 608,274 U.S. treasury securities 0 73,482 0 73,482 Mortgage backed obligations 0 43,925 0 43,925 Asset backed securities 0 120,137 0 120,137 Municipal securities 0 36,537 0 36,537 Foreign government obligations 0 12,301 0 12,301 U.S. agency obligations 0 19,510 0 19,510 Covered bonds 0 68,001 0 68,001 Foreign currency derivative contracts (2) 0 10,611 0 10,611 Total Assets $ 13,983 $ 1,285,265 $ 0 $ 1,299,248 Liabilities Foreign currency derivative contracts (3) $ 0 $ 5,694 $ 0 $ 5,694 Total Liabilities $ 0 $ 5,694 $ 0 $ 5,694 ______________ (1) Included in “cash and cash equivalents” in the accompanying consolidated balance sheet as of January 31, 2015 , in addition to $601.6 million of cash. (2) Included in “prepaid expenses and other current assets” in the accompanying consolidated balance sheet as of January 31, 2015 . (3) Included in “accounts payable, accrued expenses and other liabilities” in the accompanying consolidated balance sheet as of January 31, 2015 . Derivative Financial Instruments The Company enters into foreign currency derivative contracts with financial institutions to reduce the risk that its cash flows and earnings will be adversely affected by foreign currency exchange rate fluctuations. The Company uses forward currency derivative contracts to minimize the Company’s exposure to balances primarily denominated in Euros, Japanese yen, Canadian dollars, Australian dollars and British pounds. The Company’s foreign currency derivative contracts, which are not designated as hedging instruments, are used to reduce the exchange rate risk associated primarily with intercompany receivables and payables. The Company’s derivative financial instruments program is not designated for trading or speculative purposes. As of January 31, 2016 and 2015 , the foreign currency derivative contracts that were not settled were recorded at fair value on the consolidated balance sheets. Foreign currency derivative contracts are marked-to-market at the end of each reporting period with gains and losses recognized as other expense to offset the gains or losses resulting from the settlement or remeasurement of the underlying foreign currency denominated receivables and payables. While the contract or notional amount is often used to express the volume of foreign currency derivative contracts, the amounts potentially subject to credit risk are generally limited to the amounts, if any, by which the counterparties’ obligations under the agreements exceed the obligations of the Company to the counterparties. Details on outstanding foreign currency derivative contracts related primarily to intercompany receivables and payables are presented below (in thousands): As of January 31, 2016 2015 Notional amount of foreign currency derivative contracts $ 1,274,515 $ 942,086 Fair value of foreign currency derivative contracts $ (9,294 ) $ 4,917 The fair value of the Company’s outstanding derivative instruments are summarized below (in thousands): Fair Value of Derivative Instruments As of January 31, Balance Sheet Location 2016 2015 Derivative Assets Derivatives not designated as hedging instruments: Foreign currency derivative contracts Prepaid expenses and other current assets $ 4,731 $ 10,611 Derivative Liabilities Derivatives not designated as hedging instruments: Foreign currency derivative contracts Accounts payable, accrued expenses and other liabilities $ 14,025 $ 5,694 The effect of the derivative instruments not designated as hedging instruments on the consolidated statements of operations during fiscal 2016 , 2015 and 2014 , respectively, are summarized below (in thousands): Derivatives Not Designated as Hedging Instruments Gains (losses) on Derivative Instruments Recognized in Income Fiscal Year Ended January 31, Location 2016 2015 2014 Foreign currency derivative contracts Other expense $ (25,786 ) $ (1,186 ) $ 108 Strategic Investments The Company's strategic investments are comprised of marketable equity securities and non-marketable debt and equity securities. Marketable equity securities are measured using quoted prices in their respective active markets and the non-marketable equity and debt securities are recorded at cost. These investments are presented on the consolidated balance sheets within strategic investments. As of January 31, 2016 , the Company had six investments in marketable equity securities with a fair value of $16.2 million , which includes an unrealized gain of $8.5 million . As of January 31, 2015 , the Company had four investments in marketable equity securities with a fair value of $17.8 million , which included an unrealized gain of $13.1 million . The change in the fair value of the investments in publicly held companies is recorded in the consolidated balance sheets within strategic investments and accumulated other comprehensive loss. The Company’s interest in non-marketable debt and equity securities consists of noncontrolling debt and equity investments in privately held companies. The Company’s investments in these privately held companies are reported at cost or marked down to fair value when an event or circumstance indicates an other-than-temporary decline in value has occurred. These investments are valued using significant unobservable inputs or data in an inactive market and the valuation requires the Company's judgment due to the absence of market prices and inherent lack of liquidity. As of January 31, 2016 and 2015 , the carrying value of the Company’s non-marketable debt and equity securities was $504.5 million and $158.0 million , respectively. The estimated fair value of the non-marketable debt and equity securities was approximately $714.1 million and $280.0 million as of January 31, 2016 and January 31, 2015 , respectively. These investments are measured using the cost method of accounting, therefore the unrealized gains of $209.6 million and $122.0 million as of January 31, 2016 and January 31, 2015 , respectively, are not recorded in the consolidated financial statements. Strategic investments consisted of the following (in thousands): Description Balance at beginning of year Additions Sales, dispositions and fair market value adjustments (1) Balance at end of year Fiscal year ended January 31, 2016 Strategic investments $ 175,774 386,219 (41,272 ) $ 520,721 Fiscal year ended January 31, 2015 Strategic investments $ 92,489 101,774 (18,489 ) $ 175,774 (1) Amounts include the release of the cost-basis and the current unrealized gain or loss balance recorded in accumulated other comprehensive loss when shares of a publicly-held investment are sold, disposition-related reductions of a cost-basis investment if a privately-held company within the portfolio is acquired by another company, fair market value adjustments such as cost basis reductions related to impairments that are other-than-temporary and unrealized gains or losses related to investments held in publicly traded companies. Investment Income Investment income consists of interest income, realized gains, and realized losses on the Company’s cash, cash equivalents and marketable securities. The components of investment income are presented below (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Interest income $ 14,146 $ 10,129 $ 9,512 Realized gains 3,287 517 5,952 Realized losses (2,092 ) (608 ) (5,246 ) Total investment income $ 15,341 $ 10,038 $ 10,218 Reclassification adjustments out of accumulated other comprehensive loss into net loss were immaterial for fiscal 2016 , 2015 and 2014 , respectively.

Property and Equipment

Property and Equipment	12 Months Ended
	Jan. 31, 2016
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment, net consisted of the following (in thousands): As of January 31, 2016 2015 Land $ 183,888 $ 0 Buildings 614,081 125,289 Computers, equipment and software 1,281,766 1,171,762 Furniture and fixtures 82,242 71,881 Leasehold improvements 473,688 376,761 2,635,665 1,745,693 Less accumulated depreciation and amortization (919,837 ) (619,827 ) $ 1,715,828 $ 1,125,866 Depreciation and amortization expense totaled $302.0 million , $246.6 million and $185.9 million during fiscal 2016 , 2015 and 2014 , respectively. Computers, equipment and software at January 31, 2016 and 2015 included a total of $747.1 million and $734.7 million acquired under capital lease agreements, respectively. Accumulated amortization relating to computers, equipment and software under capital leases totaled $310.3 million and $206.7 million , respectively, at January 31, 2016 and 2015 . Amortization of assets under capital leases is included in depreciation and amortization expense. Land In August 2014 , the Company sold approximately 3.7 net acres of its undeveloped real estate, which had been classified as held for sale, for a total of $72.5 million . The Company recognized a gain of $7.8 million , net of closing costs, on the sale of this portion of the Company’s land and building improvements. Separately, in September 2014 , the Company sold approximately 1.5 net acres of its remaining undeveloped real estate, which had been classified as held for sale, and the remaining portion of the perpetual parking rights, for a total of $125.0 million . The Company recognized a gain of $7.8 million , net of closing costs, on the sale of this portion of the Company’s land, building improvements and perpetual parking rights. In October 2015 , the Company sold approximately 8.8 net acres of undeveloped real estate and the associated perpetual parking rights in San Francisco, California, which were classified as held for sale. The total proceeds from the sale were $157.1 million , of which the Company received $127.1 million in October 2015 and previously received a nonrefundable deposit in the amount of $30.0 million during April 2014. The Company recognized a gain of $21.8 million , net of closing costs, on the sale of this portion of the Company’s land and building improvements and perpetual parking rights. Building In December 2013 , the Company entered into a lease agreement for approximately 445,000 rentable square feet of office space at 350 Mission Street in San Francisco, California. The space rented is for the total office space available in the building, which is in the process of being constructed. As a result of the Company’s involvement during the construction period, the Company is considered for accounting purposes to be the owner of the construction project. As of January 31, 2016 , the Company had capitalized $174.6 million of construction costs, based on the construction costs incurred to date by the landlord, and recorded a corresponding current and noncurrent financing obligation liability of $15.4 million and $196.7 million , respectively. As of January 31, 2015 , the Company had capitalized $125.3 million of construction costs, based on the construction costs incurred to date by the landlord, and recorded a corresponding noncurrent financing obligation liability of $125.3 million . The total expected financing obligation associated with this lease upon completion of the construction of the building, inclusive of the amounts currently recorded, is $334.0 million , including interest (see Note 10 “Commitments” for future commitment details). The obligation will be settled through monthly lease payments to the landlord once the office space is ready for occupancy. To the extent that operating expenses for 350 Mission are material, the Company, as the deemed accounting owner, will record the operating expenses. In April 2015, the building was placed into service and depreciation commenced.

Business Combinations

Business Combinations	12 Months Ended
	Jan. 31, 2016
Business Combinations [Abstract]
Business Combinations	Business Combinations 50 Fremont In February 2015, the Company acquired 50 Fremont Street, a 41 -story building totaling approximately 817,000 rentable square feet located in San Francisco, California (“50 Fremont”). At the time of the acquisition, the Company was leasing approximately 500,000 square feet of the available space in 50 Fremont. As of January 31, 2016, the Company occupied approximately 567,000 square feet. The Company acquired 50 Fremont for the purpose of expanding its global headquarters in San Francisco. Pursuant to the acquisition agreement, the Company also acquired existing third-party leases and other intangible property, terminated the Company’s existing office leases with the seller and assumed the seller's outstanding loan on 50 Fremont. In accordance with Accounting Standards Codification 805 (“ASC 805”), Business Combinations, the Company accounted for the building purchase as a business combination. The purchase consideration for the corporate headquarters building was as follows (in thousands): Fair Value Cash $ 435,189 Loan assumed on 50 Fremont 200,000 Prorations due to ownership transfer midmonth 2,411 Total purchase consideration $ 637,600 The following table summarizes the fair values of net tangible and intangible assets acquired (in thousands): Fair Value Building $ 435,390 Land 183,888 Termination of salesforce operating lease 9,483 Acquired lease intangibles 7,590 Loan assumed on 50 Fremont fair market value adjustment 1,249 Total $ 637,600 To fund the purchase of 50 Fremont, the Company used $115.0 million of restricted cash that the Company had on the balance sheet as of January 31, 2015. In connection with the purchase, the Company recognized a net non-cash gain totaling approximately $36.6 million on the termination of the lease signed in January 2012. This amount reflects a gain of $46.1 million for the reversal of tenant incentives provided from the previous landlord at the inception of the lease and a loss of $9.5 million related to the termination of the Company's operating lease. The tax impact as a result of the difference between tax and book basis of the building is insignificant after considering the impact of the Company's valuation allowance. The amounts above have been included in the Company's consolidated statements of operations and consolidated balance sheet. The Company has included the rental income from third party leases with other tenants in the building, and the proportionate share of building expenses for those leases in other expense in the Company's consolidated results of operations from the date of acquisition. These amounts are recorded in other expense as this net rental income is not part of our core operations. These amounts were not material for the periods presented. Business Combinations Fiscal 2016 During fiscal 2016 , the Company acquired several companies for an aggregate of $60.1 million in cash, net of cash acquired, and has included the financial results of these companies in its consolidated financial statements from the respective dates of acquisition. These transactions, individually and in aggregate, are not material to the Company. The Company accounted for these transactions as business combinations. In allocating the purchase consideration for each company based on estimated fair values, the Company recorded $68.7 million of goodwill. Some of the goodwill balance associated with these transactions is deductible for U.S. income tax purposes. Fiscal Year 2015 RelateIQ, Inc. On August 1, 2014, the Company acquired the outstanding stock of RelateIQ, Inc. (“RelateIQ”), a relationship intelligence platform company that uses data science and machine learning to automatically capture data from email, calendars and smartphone calls and provide data science-driven insights in real time. The Company acquired RelateIQ for the assembled workforce and expected synergies with the Company’s current offerings. The Company has included the financial results of RelateIQ in the consolidated financial statements from the date of acquisition, which have not been material to date. The acquisition date fair value of the consideration transferred for RelateIQ was approximately $340.2 million , which consisted of the following (in thousands, except share data): Fair Value Cash $ 1,123 Common stock (6,320,735 shares) 338,033 Fair value of stock options and restricted stock awards assumed 1,050 Total $ 340,206 The fair value of the stock options assumed by the Company was determined using the Black-Scholes option pricing model. The share conversion ratio of 0.12 was applied to convert RelateIQ’s outstanding equity awards for RelateIQ’s common stock into equity awards for shares of the Company’s common stock. The following table summarizes the estimated fair values of assets acquired and liabilities assumed as of the date of acquisition (in thousands): Fair Value Cash $ 39,194 Intangible assets 16,200 Goodwill 289,857 Current and noncurrent liabilities (4,700 ) Deferred tax liability (345 ) Net assets acquired $ 340,206 The excess of purchase consideration over the fair value of net tangible and identifiable intangible assets acquired was recorded as goodwill. The fair values assigned to tangible assets acquired, liabilities assumed and identifiable intangible assets are based on management’s estimates and assumptions. The following table sets forth the components of identifiable intangible assets acquired (in thousands) and their estimated useful lives as of the date of acquisition: Fair Value Useful Life Developed technology $ 14,470 7 years Customer relationships and other purchased intangible assets 1,730 1-3 years Total $ 16,200 The amount recorded for developed technology represents the estimated fair value of RelateIQ’s relationship intelligence technology. The amount recorded for customer relationships represent the fair values of the underlying relationships with RelateIQ customers. The goodwill balance is primarily attributed to the assembled workforce and expanded market opportunities when integrating RelateIQ’s relationship intelligence technology with the Company’s other offerings. The goodwill balance is not deductible for U.S. income tax purposes. The Company assumed unvested equity awards for shares of RelateIQ’s common stock with a fair value of $33.9 million . Of the total consideration, $1.1 million was allocated to the purchase consideration and $32.8 million was allocated to future services and will be expensed over the remaining service periods on a straight-line basis. Goodwill Goodwill represents the excess of the purchase price in a business combination over the fair value of net tangible and intangible assets acquired. Goodwill amounts are not amortized, but rather tested for impairment at least annually during the fourth quarter. Goodwill consisted of the following (in thousands): Balance as of January 31, 2014 $ 3,500,823 RelateIQ 289,857 Finalization of acquisition date fair values (8,020 ) Balance as of January 31, 2015 3,782,660 Other acquisitions 68,655 Finalization of acquisition date fair values (1,378 ) Balance as of January 31, 2016 $ 3,849,937 There was no impairment of goodwill during fiscal 2016 , 2015 or 2014 . Intangible Assets Intangible assets acquired resulting from business combinations are as follows as of January 31, 2016 (in thousands): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life Acquired developed technology $ 684,260 $ (451,889 ) $ 232,371 3.4 Customer relationships 410,763 (160,866 ) 249,897 5.2 Trade name and trademark 38,980 (38,980 ) 0 0.0 Territory rights and other 12,372 (8,585 ) 3,787 2.6 50 Fremont lease intangibles 7,713 (3,762 ) 3,951 2.3 Total $ 1,154,088 $ (664,082 ) $ 490,006 4.3 Intangible assets acquired resulting from business combinations were as follows as of January 31, 2015 (in thousands): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life Acquired developed technology $ 674,160 $ (371,997 ) $ 302,163 4.3 Customer relationships 409,603 (107,245 ) 302,358 6.1 Trade name and trademark 38,980 (17,142 ) 21,838 1.0 Territory rights 12,355 (6,522 ) 5,833 3.1 Total $ 1,135,098 $ (502,906 ) $ 632,192 5.0 The expected future amortization expense for purchased intangible assets as of January 31, 2016 is as follows (in thousands): Fiscal Period: Fiscal 2017 $ 131,491 Fiscal 2018 118,762 Fiscal 2019 101,425 Fiscal 2020 73,268 Fiscal 2021 45,859 Thereafter 19,201 Total amortization expense $ 490,006

Debt

Debt	12 Months Ended
	Jan. 31, 2016
Debt Disclosure [Abstract]
Debt	Debt Convertible Senior Notes Par Value Outstanding Equity Component Recorded at Issuance Liability Component of Par Value as of January 31, (in thousands) 2016 2015 0.25% Convertible Senior Notes due April 1, 2018 $ 1,150,000 $ 122,421 (1) $ 1,095,059 $ 1,070,692 ___________ (1) This amount represents the equity component recorded at the initial issuance of the 0.25% convertible senior notes. In March 2013, the Company issued at par value $1.15 billion of 0.25% convertible senior notes (the “ 0.25% Senior Notes”) due April 1, 2018 , unless earlier purchased by the Company or converted. Interest is payable semi-annually, in arrears on April 1 and October 1 of each year. The 0.25% Senior Notes are governed by an indenture between the Company, as issuer, and U.S. Bank National Association, as trustee. The 0.25% Senior Notes are unsecured and do not contain any financial covenants or any restrictions on the payment of dividends, the incurrence of senior debt or other indebtedness, or the issuance or repurchase of securities by the Company. If converted, holders of the 0.25% Senior Notes will receive cash equal to the principal amount, and at the Company’s election, cash, shares of the Company’s common stock, or a combination of cash and shares, for any amounts in excess of the principal amounts. Certain terms of the conversion features of the 0.25% Senior Notes are as follows: Conversion Rate per $1,000 Par Value Initial Conversion Price per Share Convertible Date 0.25% Senior Notes 15.0512 $ 66.44 January 1, 2018 Throughout the term of the 0.25% Senior Notes, the conversion rate may be adjusted upon the occurrence of certain events, including any cash dividends. Holders of the 0.25% Senior Notes will not receive any cash payment representing accrued and unpaid interest upon conversion of a Note. Accrued but unpaid interest will be deemed to be paid in full upon conversion rather than canceled, extinguished or forfeited. Holders may convert the 0.25% Senior Notes under the following circumstances: • during any fiscal quarter, if, for at least 20 trading days during the 30 consecutive trading day period ending on the last trading day of the immediately preceding fiscal quarter, the last reported sales price of the Company’s common stock for such trading day is greater than or equal to 130% of the applicable conversion price on such trading day share of common stock on such last trading day; • in certain situations, when the trading price of the 0.25% Senior Notes is less than 98% of the product of the sale price of the Company’s common stock and the conversion rate; • upon the occurrence of specified corporate transactions described under the 0.25% Senior Notes indenture, such as a consolidation, merger or binding share exchange; or • at any time on or after the convertible date noted above. Holders of the 0.25% Senior Notes have the right to require the Company to purchase with cash all or a portion of the Notes upon the occurrence of a fundamental change, such as a change of control, at a purchase price equal to 100% of the principal amount of the 0.25% Senior Notes plus accrued and unpaid interest. Following certain corporate transactions that constitute a change of control, the Company will increase the conversion rate for a holder who elects to convert the 0.25% Senior Notes in connection with such change of control. In accounting for the issuances of the 0.25% Senior Notes, the Company separated the 0.25% Senior Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the 0.25% Senior Notes as a whole. The excess of the principal amount of the liability component over its carrying amount (“debt discount”) is amortized to interest expense over the term of the 0.25% Senior Notes. The equity component is not remeasured as long as it continues to meet the conditions for equity classification. In accounting for the transaction costs related to the 0.25% Senior Notes issuance, the Company allocated the total amount incurred to the liability and equity components based on its relative values. Transaction costs attributable to the liability component are being amortized to expense over the terms of the 0.25% Senior Notes, and transaction costs attributable to the equity component were netted with the equity component in temporary stockholders’ equity and stockholders’ equity. The 0.25% Senior Notes consisted of the following (in thousands): As of January 31, January 31, Liability component : Principal: 0.25% Senior Notes (1) $ 1,150,000 $ 1,150,000 Less: debt discount, net 0.25% Senior Notes (2) (54,941 ) (79,308 ) Net carrying amount $ 1,095,059 $ 1,070,692 (1) The effective interest rates of the 0.25% Senior Notes is 2.53% . These interest rates were based on the interest rates of a similar liability at the time of issuance that did not have an associated convertible feature. (2) Included in the consolidated balance sheets within Convertible 0.25% Senior Notes (which is classified as a noncurrent liability) and is amortized over the life of the 0.25% Senior Notes using the effective interest rate method. The total estimated fair values of the Company’s 0.25% Senior Notes at January 31, 2016 was $1.4 billion . The fair value was determined based on the closing trading price per $100 of the 0.25% Senior Notes as of the last day of trading for fiscal 2016 . Based on the closing price of the Company’s common stock of $68.06 on January 29, 2016, the if-converted value of the 0.25% Senior Notes exceeded their principal amount by approximately $28.0 million . Based on the terms of the 0.25% Senior Notes, the Senior Notes were not convertible at any time during the fiscal year ended January 31, 2016 . Note Hedges To minimize the impact of potential economic dilution upon conversion of the Notes, the Company entered into convertible note hedge transactions with respect to its common stock (the “Note Hedges”). (in thousands, except for shares) Date Purchase Shares 0.25% Note Hedges March 2013 $ 153,800 17,308,880 The Note Hedges cover shares of the Company’s common stock at a strike price that corresponds to the initial conversion price of the respective Notes, also subject to adjustment, and are exercisable upon conversion of the Notes. The Note Hedges will expire upon the maturity of the Notes. The Note Hedges are intended to reduce the potential economic dilution upon conversion of the Notes in the event that the market value per share of the Company’s common stock, as measured under the Notes, at the time of exercise is greater than the conversion price of the Notes. The Note Hedges are separate transactions and are not part of the terms of the Notes. Holders of the Notes will not have any rights with respect to the Note Hedges. The Note Hedges do not impact earnings per share. Warrants Date Proceeds (in thousands) Shares Strike Price 0.25% Warrants March 2013 $ 84,800 17,308,880 $ 90.40 In March 2013, the Company also entered into a warrants transaction (the “ 0.25% Warrants”), whereby the Company sold warrants to acquire, subject to anti-dilution adjustments, shares of the Company’s common stock. The 0.25% Warrants were anti-dilutive for the periods presented. The 0.25% Warrants are separate transactions entered into by the Company and are not part of the terms of the 0.25% Senior Notes or the 0.25% Note Hedges. Holders of the 0.25% Senior Notes and 0.25% Note Hedges will not have any rights with respect to the 0.25% Warrants. Term Loan On July 11, 2013, the Company entered into a credit agreement (the “Prior Credit Agreement”) with Bank of America, N.A. and certain other lenders. The Prior Credit Agreement provided for a $300.0 million term loan (the “Term Loan”) maturing on July 11, 2016 (the “Term Loan Maturity Date”), which was entered into in conjunction with and for purposes of funding the acquisition of ExactTarget in fiscal 2014. The Term Loan bore interest at the Company’s option at either a base rate plus a spread of 0.50% to 1.00% or an adjusted LIBOR rate as defined in the Prior Credit Agreement plus a spread of 1.50% to 2.00% . In October 2014, the Company repaid the Term Loan in full and the Prior Credit Agreement was terminated. Revolving Credit Facility In October 2014, the Company entered into an agreement (the “Credit Agreement”) with Wells Fargo, N.A. and certain other institutional lenders that provides for a $650.0 million unsecured revolving credit facility that matures on October 6, 2019 (the “Credit Facility”). Immediately upon closing, the Company borrowed $300.0 million under the Credit Facility, approximately $262.5 million of which was used to repay in full the indebtedness under the Company's Term Loan, as described above. Borrowings under the Credit Facility bear interest, at the Company’s option at either a base rate, as defined in the Credit Agreement, plus a margin of 0.00% to 0.75% or LIBOR plus a margin of 1.00% to 1.75% . The Company is obligated to pay ongoing commitment fees at a rate between 0.125% and 0.25% . Such interest rate margins and commitment fees are based on the Company’s consolidated leverage ratio for the preceding four fiscal quarter periods. Interest and the commitment fees are payable in arrears quarterly. The Company may use amounts borrowed under the Credit Facility for working capital, capital expenditures and other general corporate purposes, including permitted acquisitions. Subject to certain conditions stated in the Credit Agreement, the Company may borrow amounts under the Credit Facility at any time during the term of the Credit Agreement. The Company may also prepay borrowings under the Credit Agreement, in whole or in part, at any time without premium or penalty, subject to certain conditions, and amounts repaid or prepaid may be reborrowed. The Credit Agreement contains certain customary affirmative and negative covenants, including a consolidated leverage ratio covenant, a consolidated interest coverage ratio covenant, a limit on the Company’s ability to incur additional indebtedness, dispose of assets, make certain acquisition transactions, pay dividends or distributions, and certain other restrictions on the Company’s activities each defined specifically in the Credit Agreement. The Company was in compliance with the Credit Agreement’s covenants as of January 31, 2016 . In March 2015, the Company paid down $300.0 million of outstanding borrowings under the Credit Facility. There are currently no outstanding borrowings held under the Credit Facility as of January 31, 2016 . The weighted average interest rate on borrowings under the Credit Facility was 1.6% for the period beginning October 6, 2014 and ended March 2015. The Company continues to pay a fee on the undrawn amount of the Credit Facility. Loan Assumed on 50 Fremont The Company assumed a $200.0 million loan with the acquisition of 50 Fremont (the “Loan”). The Loan bears an interest rate of 3.75% per annum and is due in June 2023. The Loan initially requires interest only payments. Beginning in fiscal year 2019, principal and interest payments are required, with the remaining principal due at maturity. For the fiscal year 2016, total interest expense recognized was $7.3 million . The Loan can be prepaid at any time subject to a yield maintenance fee. The agreement governing the Loan contains certain customary affirmative and negative covenants that the Company was in compliance with as of January 31, 2016. Interest Expense on Convertible Senior Notes, Revolving Credit Facility and Loan Secured by 50 Fremont The following table sets forth total interest expense recognized related to the Notes, the Term Loan and the Credit Facility prior to capitalization of interest (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Contractual interest expense $ 11,879 $ 10,224 $ 10,195 Amortization of debt issuance costs 4,105 4,622 4,470 Amortization of debt discount 24,504 36,575 46,942 $ 40,488 $ 51,421 $ 61,607

Other Balance Sheet Accounts

Other Balance Sheet Accounts	12 Months Ended
	Jan. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other Balance Sheet Accounts	Other Balance Sheet Accounts Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): As of January 31, January 31, Prepaid income taxes $ 22,044 $ 21,514 Customer contract asset 1,423 16,620 Other taxes receivable 27,341 27,540 Prepaid expenses and other current assets 199,786 179,352 $ 250,594 $ 245,026 Customer contract asset reflects future billings of amounts that are contractually committed by ExactTarget’s existing customers as of the acquisition date that will be billed in the next 12 months. As the Company bills these customers this balance will reduce and accounts receivable will increase. Included in prepaid expenses and other current assets are value-added tax and sales tax receivables associated with the sale of the Company's services to third parties. Value-added tax and sales tax receivables totaled $27.3 million and $27.5 million at January 31, 2016 and 2015, respectively. Capitalized Software, net Capitalized software consisted of the following (in thousands): As of January 31, January 31, Capitalized internal-use software development costs, net of accumulated amortization of $186,251 and $136,314, respectively $ 123,065 $ 96,617 Acquired developed technology, net of accumulated amortization of $481,118 and $392,736, respectively 261,193 336,781 $ 384,258 $ 433,398 Capitalized internal-use software amortization expense totaled $49.9 million , $35.7 million , $29.2 million for fiscal 2016 , 2015 and 2014 , respectively. Acquired developed technology amortization expense totaled $88.4 million , $98.4 million and $114.7 million for fiscal 2016 , 2015 and 2014 , respectively. The Company capitalized $6.1 million , $5.3 million and $3.5 million of stock-based expenses related to capitalized internal-use software development and deferred professional services during fiscal 2016 , 2015 and 2014 , respectively. Other Assets, net Other assets consisted of the following (in thousands): As of January 31, January 31, Deferred income taxes, noncurrent, net $ 15,986 $ 16,948 Long-term deposits 19,469 19,715 Purchased intangible assets, net of accumulated amortization of $212,248 and $130,968, respectively 258,580 329,971 Acquired intellectual property, net of accumulated amortization of $22,439 and $15,695, respectively 10,565 15,879 Customer contract asset 93 1,447 Other 74,069 76,259 $ 378,762 $ 460,219 Purchased intangible assets amortization expense for fiscal 2016 , 2015 and 2014 was $81.3 million , $64.6 million , $37.6 million respectively. Acquired intellectual property amortization expense for fiscal 2016 , 2015 and 2014 was $6.7 million , $5.0 million and $4.2 million respectively. Accounts Payable, Accrued Expenses and Other Liabilities Accounts payable, accrued expenses and other liabilities consisted of the following (in thousands): As of January 31, January 31, Accounts payable $ 71,481 $ 95,537 Accrued compensation 554,502 457,102 Accrued other liabilities 447,729 321,032 Accrued income and other taxes payable 205,781 184,844 Accrued professional costs 33,814 16,889 Customer liability, current (1) 6,558 13,084 Accrued rent 14,071 14,847 Financing obligation, building in progress-leased facility, current 15,402 0 $ 1,349,338 $ 1,103,335 (1) Customer liability reflects the legal obligation to provide future services that are contractually committed to ExactTarget’s existing customers but unbilled as of the acquisition date in July 2013. As these services are invoiced, this balance will decrease and deferred revenue will increase. Other Noncurrent Liabilities Other noncurrent liabilities consisted of the following (in thousands): As of January 31, January 31, Deferred income taxes and income taxes payable $ 85,996 $ 66,541 Customer liability, noncurrent 66 1,026 Financing obligation, building in progress-leased facility 196,711 125,289 Long-term lease liabilities and other 550,292 701,612 $ 833,065 $ 894,468

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Jan. 31, 2016
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity The Company maintains the following stock plans: the ESPP, the 2013 Equity Incentive Plan and the 2014 Inducement Equity Incentive Plan (the “2014 Inducement Plan”). The expiration of the 1999 Stock Option Plan (“1999 Plan”) in fiscal 2010 did not affect awards outstanding, which continue to be governed by the terms and conditions of the 1999 Plan. On July 10, 2014, the Company adopted the 2014 Inducement Plan with a reserve of 335,000 shares of common stock for future issuance solely for the granting of inducement stock options and equity awards to new employees, including employees of acquired companies. In addition, approximately 319,000 shares of common stock that remained available for grant under the 2006 Inducement Equity Incentive Plan (the “Prior Inducement Plan”) as of July 9, 2014 were added to the 2014 Inducement Plan share reserve and the Prior Inducement Plan was terminated. Further, any shares of common stock subject to outstanding awards under the Prior Inducement Plan that expire, are forfeited, or are repurchased by the Company will also become available for future grant under the 2014 Inducement Plan. Termination of the Prior Inducement Plan did not affect the outstanding awards previously issued thereunder. The 2014 Inducement Plan was adopted without stockholder approval in reliance on the “employment inducement exemption” provided under the New York Stock Exchange Listed Company Manual. In September 2011, the Company’s Board of Directors amended and restated the ESPP. In conjunction with the amendment of the ESPP, the Company’s Board of Directors determined that the offerings under the ESPP would commence, beginning with a twelve month offering period starting in December 2011. As of January 31, 2016 , $37.5 million has been withheld on behalf of employees for future purchases under the ESPP and is recorded in accounts payable, accrued expenses and other liabilities. Employees purchased 3.0 million shares for $155.0 million and 3.3 million shares for $127.8 million , in fiscal 2016 and 2015 , respectively, under the ESPP. Prior to February 1, 2006, options issued under the Company’s stock option plans generally had a term of 10 years. From February 1, 2006 through July 3, 2013, options issued had a term of five years. After July 3, 2013, options issued have a term of seven years. During fiscal 2016, the Company granted a performance-based restricted stock unit award to the Chairman of the Board and Chief Executive Officer subject to vesting based on a performance-based condition and a service-based condition. These performance-based restricted stock units will vest simultaneously if the performance condition is achieved. Stock activity excluding the ESPP is as follows: Options Outstanding Shares Available for Grant Outstanding Stock Options Weighted- Average Exercise Price Aggregate Intrinsic Value Balance as of January 31, 2015 30,789,538 29,458,361 $ 44.36 Increase in shares authorized: 2013 Equity Incentive Plan 39,148,364 0 0.00 2014 Inducement Equity Incentive Plan 231,871 0 0.00 Options granted under all plans (7,119,327 ) 7,119,327 78.85 Restricted stock activity (15,905,661 ) 0 0.00 Performance restricted stock units (411,471 ) 0 0.00 Stock grants to board and advisory board members (192,298 ) 0 0.00 Exercised 0 (8,188,987 ) 35.53 Plan shares expired (1,791,011 ) 0 0.00 Canceled 2,129,903 (2,129,903 ) 46.87 Balance as of January 31, 2016 46,879,908 26,258,798 $ 56.26 $ 386,893,769 Vested or expected to vest 23,956,184 $ 54.97 $ 375,375,548 Exercisable as of January 31, 2016 9,763,563 $ 41.99 $ 254,557,559 The total intrinsic value of the options exercised during fiscal 2016 , 2015 and 2014 was $291.3 million , $250.3 million and $292.3 million respectively. The intrinsic value is the difference between the current market value of the stock and the exercise price of the stock option. The weighted-average remaining contractual life of vested and expected to vest options is approximately 4.75 years. As of January 31, 2016 , options to purchase 9,763,563 shares were vested at a weighted average exercise price of $41.99 per share and had a remaining weighted-average contractual life of approximately 3.3 years . The total intrinsic value of these vested options as of January 31, 2016 was $254.6 million . The following table summarizes information about stock options outstanding as of January 31, 2016 : Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding Weighted- Average Remaining Contractual Life (Years) Weighted- Average Exercise Price Number of Shares Weighted- Average Exercise Price $0.86 to $37.95 4,555,639 2.0 $ 29.18 3,838,627 $ 28.42 $38.03 to $52.14 2,556,681 2.3 39.94 1,826,462 39.62 $52.30 3,800,524 4.8 52.30 1,852,072 52.30 $53.60 to $57.79 1,466,601 5.4 55.29 459,196 55.31 $59.34 6,313,261 5.8 59.34 1,739,344 59.34 $59.37 to $77.86 1,925,609 6.2 68.04 47,862 63.07 $80.99 5,640,483 6.8 80.99 0 0.00 26,258,798 4.9 $ 56.26 9,763,563 $ 41.99 Restricted stock activity is as follows: Restricted Stock Outstanding Outstanding Weighted- Average Exercise Price Aggregate Intrinsic Value Balance as of January 31, 2014 24,653,578 $ 0.001 Granted- restricted stock units and awards 11,170,913 0.001 Canceled (3,174,976 ) 0.001 Vested and converted to shares (9,505,507 ) 0.001 Balance as of January 31, 2015 23,144,008 $ 0.001 Granted- restricted stock units and awards 9,736,623 0.001 Granted- performance stock units 191,382 0.001 Canceled (2,715,332 ) 0.001 Vested and converted to shares (9,062,096 ) 0.001 Balance as of January 31, 2016 21,294,585 $ 0.001 $ 1,449,309,455 Expected to vest 17,846,945 $ 1,214,663,077 The restricted stock, which upon vesting entitles the holder to one share of common stock for each share of restricted stock, has an exercise price of $0.001 per share, which is equal to the par value of the Company’s common stock, and generally vests over 4 years. The weighted-average grant date fair value of the restricted stock issued for fiscal 2016 , 2015 and 2014 was $73.61 , $58.89 and $46.99 , respectively. Common Stock The following number of shares of common stock were reserved and available for future issuance at January 31, 2016 : Options outstanding 26,258,798 Restricted stock awards and units and performance stock units outstanding 21,294,585 Stock available for future grant: 2013 Equity Incentive Plan 46,233,360 2014 Inducement Equity Incentive Plan 646,548 2004 Employee Stock Purchase Plan 6,844,796 Convertible senior notes 17,308,880 Warrants 17,308,880 135,895,847 During fiscal years 2016 , 2015 and 2014 , certain board members received stock grants totaling 67,041 shares of common stock, 83,127 shares of common stock and 108,800 shares of common stock, respectively for board services pursuant to the terms described in the 2013 Plan and previously, the 2004 Outside Directors Stock Plan. The expense related to these awards, which was expensed immediately at the time of the issuance, totaled $4.8 million , $5.0 million and $4.5 million for fiscal 2016 , 2015 and 2014 , respectively. Preferred Stock The Company’s board of directors has the authority, without further action by stockholders, to issue up to 5,000,000 shares of preferred stock in one or more series. The Company’s board of directors may designate the rights, preferences, privileges and restrictions of the preferred stock, including dividend rights, conversion rights, voting rights, terms of redemption, liquidation preference, sinking fund terms, and number of shares constituting any series or the designation of any series. The issuance of preferred stock could have the effect of restricting dividends on the Company’s common stock, diluting the voting power of its common stock, impairing the liquidation rights of its common stock, or delaying or preventing a change in control. The ability to issue preferred stock could delay or impede a change in control. As of January 31, 2016 and 2015 , no shares of preferred stock were outstanding.

Income Taxes

Income Taxes	12 Months Ended
	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate The domestic and foreign components of income (loss) before provision for (benefit from) income taxes consisted of the following (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Domestic $ (49,558 ) $ (211,253 ) $ (326,392 ) Foreign 113,837 (1,832 ) (31,543 ) $ 64,279 $ (213,085 ) $ (357,935 ) The provision for (benefit from) income taxes consisted of the following (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Current: Federal $ 40,723 $ 893 $ (10,431 ) State 13,023 1,388 (245 ) Foreign 57,347 50,493 39,784 Total 111,093 52,774 29,108 Deferred: Federal 1,453 8,771 (128,798 ) State (426 ) (10,830 ) (22,012 ) Foreign (415 ) (1,112 ) (4,058 ) Total 612 (3,171 ) (154,868 ) Provision for (benefit from) income taxes $ 111,705 $ 49,603 $ (125,760 ) During fiscal 2016 , 2015 and 2014 , the Company recorded net tax benefits that resulted from allocating certain tax effects related to exercises of stock options and vesting of restricted stock directly to stockholders’ equity in the amount of $59.5 million , $7.7 million and $8.1 million , respectively. In fiscal 2016, the Company recorded income taxes in profitable jurisdictions outside the United States and current tax expense in the United States. The Company had U.S. current tax expense as a result of taxable income before considering certain excess tax benefits from stock options and vesting of restricted stock. In fiscal 2015 , the Company recorded income taxes in profitable jurisdictions outside the United States, which was partially offset by tax benefits from current year losses incurred by ExactTarget in certain state jurisdictions. In fiscal 2014 , the Company recorded a partial release of its valuation allowance primarily in connection with the acquisition of ExactTarget. Due to the ExactTarget acquisition, a deferred tax liability was recorded for the book-tax basis difference related to purchased intangibles. The net deferred tax liability from acquisitions provided an additional source of income to support the realizability of the Company’s pre-existing deferred tax assets and as a result, the Company released a portion of its valuation allowance and recorded a tax benefit of $143.1 million . A reconciliation of income taxes at the statutory federal income tax rate to the provision for (benefit from) income taxes included in the accompanying consolidated statements of operations is as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 U.S. federal taxes at statutory rate $ 22,498 $ (74,580 ) $ (125,277 ) State, net of the federal benefit (5,260 ) (5,332 ) (10,780 ) Foreign taxes in excess of the U.S. statutory rate (25,780 ) 29,880 33,412 Change in valuation allowance 139,565 100,143 (25,048 ) Tax credits (48,943 ) (28,056 ) (22,293 ) Non-deductible expenses 26,841 26,224 21,407 Tax expense/(benefit) from acquisitions 1,584 2,341 1,811 Other, net 1,200 (1,017 ) 1,008 Provision for (benefit from) income taxes $ 111,705 $ 49,603 $ (125,760 ) In December 2015, the U.S Tax Court ("Tax Court") formally entered its decision in Altera Corporation's ("Altera") litigation with the Internal Revenue Service ("IRS"). The litigation relates to the treatment of stock-based compensation expense in an inter-company cost-sharing arrangement with Altera's foreign subsidiary. In its opinion, the Tax Court accepted Altera's position of excluding stock-based compensation from its inter-company cost-sharing arrangement. However, the IRS appealed the Tax Court's decision on February 19, 2016. The Company will continue to monitor this matter and the related potential impacts to its financial statements. During the third quarter of fiscal 2016, the Company amended its inter-company cost-sharing arrangement to exclude stock-based compensation expense beginning in fiscal 2016 and accordingly, the Company recognized the related tax benefit through its tax provision. The Company also recorded a tax benefit of $30.4 million related to the Company's historical tax filing position, which was offset by the valuation allowance. In the above reconciliation, most of the Altera related tax benefit was reflected in the foreign taxes in excess of the U.S. statutory rate, which was partially offset by the change in valuation allowance. In December 2015, the Protecting Americans from Tax Hikes (PATH) Act of 2015 was signed into law, which made permanent several business-related provisions such as the research tax credit for qualifying amounts paid or incurred after December 31, 2014, and extended other expired provisions including bonus depreciation. While the retroactive benefit of the research tax credits was fully offset by an increase of the Company's valuation allowance in fiscal 2016 tax provision, the bonus depreciation election reduced the Company's taxable income before considering certain excess tax benefits from stock options and vesting of restricted stock, which correspondingly reduced U.S current tax expense by $18.9 million . In December 2014, the Tax Increase Prevention Act of 2014 was signed into law, which retroactively renewed expired provisions including research and development tax credits through the end of calendar year 2014. The enacted law change did not impact the Company's fiscal 2015 tax provision as the retroactive benefit of the research tax credits was fully offset by an increase in valuation allowance. The Company receives certain tax incentives in Switzerland and Singapore in the form of reduced tax rates. The tax reduction program in Switzerland expired in fiscal 2015, and the program in Singapore expired in fiscal 2016 . Deferred Income Taxes Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities were as follows (in thousands): As of January 31, 2016 2015 Deferred tax assets: Net operating loss carryforwards $ 260,015 $ 252,858 Deferred stock-based expense 89,532 96,753 Tax credits 211,997 152,715 Deferred rent expense 49,790 58,849 Accrued liabilities 122,950 92,506 Deferred revenue 14,261 15,664 Basis difference on strategic and other investments 26,202 24,637 Financing obligation 127,198 84,095 Deferred cost sharing adjustment 30,351 0 Other 22,845 20,017 Total deferred tax assets 955,141 798,094 Less valuation allowance (439,971 ) (293,097 ) Deferred tax assets, net of valuation allowance 515,170 504,997 Deferred tax liabilities: Deferred commissions (121,071 ) (107,197 ) Purchased intangibles (160,200 ) (213,920 ) Unrealized gains on investments (2,858 ) (1,793 ) Depreciation and amortization (224,435 ) (171,908 ) Other (2,207 ) (3,157 ) Total deferred tax liabilities (510,771 ) (497,975 ) Net deferred tax assets $ 4,399 $ 7,022 At January 31, 2016 , for federal income tax purposes, the Company had net operating loss carryforwards of approximately $2.3 billion , which expire in fiscal 2021 through fiscal 2036, federal research and development tax credits of approximately $146.3 million , which expire in fiscal 2020 through fiscal 2036, foreign tax credits of approximately $26.8 million , which expire in fiscal 2019 through fiscal 2026, and minimum tax credits of $0.7 million , which have no expiration date. For California income tax purposes, the Company had net operating loss carryforwards of approximately $845.0 million which expire beginning in fiscal 2017 through fiscal 2036, California research and development tax credits of approximately $124.2 million , which do not expire, and $9.5 million of enterprise zone tax credits, which expire in fiscal 2025. For other states income tax purposes, the Company had net operating loss carryforwards of approximately $1.1 billion which expire beginning in fiscal 2017 through fiscal 2036 and tax credits of approximately $11.1 million , which expire beginning in fiscal 2021 through fiscal 2026. Utilization of the Company’s net operating loss carryforwards may be subject to substantial annual limitation due to the ownership change limitations provided by the Internal Revenue Code and similar state provisions. Such an annual limitation could result in the expiration of the net operating loss and tax credit carryforwards before utilization. The Company regularly assesses the realizability of its deferred tax assets and establishes a valuation allowance if it is more-likely-than-not that some or all of its deferred tax assets will not be realized. The Company evaluates and weighs all available positive and negative evidence such as historic results, future reversals of existing deferred tax liabilities, projected future taxable income, as well as prudent and feasible tax-planning strategies. Generally, more weight is given to objectively verifiable evidence, such as the cumulative loss in recent years. The Company recorded a valuation allowance as it considered its cumulative loss in recent years as a significant piece of negative evidence that is difficult to overcome. During fiscal 2016, the valuation allowance increased by $146.9 million , primarily due to federal and state research tax credits and other U.S deferred tax assets. The Company will continue to assess the realizability of the deferred tax assets in each of the applicable jurisdictions going forward. The excess tax benefits associated with stock option exercises are recorded directly to stockholders’ equity only when such benefits are realized following the tax law ordering approach. As a result, the excess tax benefits included in net operating loss carryforwards but are not reflected in deferred tax assets for fiscal 2016 and 2015 are $623.2 million and $527.2 million , respectively. Tax Benefits Related to Stock-Based Expense The total income tax benefit related to stock-based awards was $180.2 million , $170.8 million and $147.8 million for fiscal 2016 , 2015 and 2014 , respectively, the majority of which was not recognized as a result of the valuation allowance. Unrecognized Tax Benefits and Other Considerations The Company records liabilities related to its uncertain tax positions. Tax positions for the Company and its subsidiaries are subject to income tax audits by multiple tax jurisdictions throughout the world. Certain prior year tax returns are currently being examined by various taxing authorities in countries including the United States, Switzerland and the United Kingdom. The Company recognizes the tax benefit of an uncertain tax position only if it is more likely than not that the position is sustainable upon examination by the taxing authority, based on the technical merits. The tax benefit recognized is measured as the largest amount of benefit which is greater than 50 percent likely to be realized upon settlement with the taxing authority. The Company had gross unrecognized tax benefits of $ 172.7 million , $ 146.2 million , and $102.3 million as of January 31, 2016 , 2015 and 2014 respectively. A reconciliation of the beginning and ending balance of total unrecognized tax benefits for fiscal years 2016 , 2015 and 2014 is as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Balance as of February 1, $ 146,188 $ 102,275 $ 75,144 Tax positions taken in prior period: Gross increases 7,456 17,938 8,420 Gross decreases (7,264 ) (1,967 ) (4,466 ) Tax positions taken in current period: Gross increases 38,978 34,226 27,952 Settlements (8,684 ) 0 0 Lapse of statute of limitations (781 ) (1,224 ) (5,205 ) Currency translation effect (3,152 ) (5,060 ) 430 Balance as of January 31, $ 172,741 $ 146,188 $ 102,275 For fiscal 2016 , 2015 and 2014 total unrecognized tax benefits in an amount of $56.2 million , $44.6 million and $34.9 million , respectively, if recognized, would reduce income tax expense and the Company’s effective tax rate after considering the impact of the change in valuation allowance in the U.S. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in the income tax provision. The Company accrued penalties and interest in the amount of $1.3 million , $1.3 million and $0.6 million in income tax expense during fiscal 2016 , 2015 and 2014 , respectively. The balance in the non-current income tax payable related to penalties and interest was $6.3 million , $4.6 million and $3.3 million as of January 31, 2016 , 2015 and 2014 , respectively. The Company has operations and taxable presence in multiple jurisdictions in the U.S. and outside of the U.S. Tax positions for the Company and its subsidiaries are subject to income tax audits by multiple tax jurisdictions around the world. The Company currently considers U.S. federal and state, Canada, Japan, Australia, Germany, France and the United Kingdom to be major tax jurisdictions. The Company’s U.S. federal and state tax returns since February 1999, which was the inception of the Company, remain open to examination. With some exceptions, tax years prior to fiscal 2008 in jurisdictions outside of U.S. are generally closed. However, in Japan and United Kingdom, the Company is no longer subject to examinations for years prior to fiscal 2014 and fiscal 2011, respectively. The Company is currently under audit by the U.S. Internal Revenue Service and California Franchise Tax Board for fiscal 2011 to 2012 and fiscal 2009 to 2010, respectively. Additionally, examinations are conducted in other international jurisdictions, including Switzerland and the United Kingdom. During fiscal 2016, the Company completed examinations or effectively settled on tax positions with various taxing authorities and accordingly, decreased unrecognized tax benefits by $8.7 million resulting from settlements. The Company regularly evaluates its uncertain tax positions and the likelihood of outcomes from these tax examinations. Significant judgment and estimates are necessary in the determination of income tax reserves. The Company believes that it has provided adequate reserves for its income tax uncertainties. However, the outcome of the tax audits cannot be predicted with certainty. If any issues addressed in the Company's tax audits are resolved in a manner inconsistent with management's expectations, the Company could adjust its provision for income taxes in the future. In the next twelve months, as some of these ongoing examinations are completed and tax positions in these tax years meet the conditions of being effectively settled, the Company anticipates it is reasonably possible that a decrease of unrecognized tax benefits up to approximately $15 million may occur.

Earnings_Loss Per Share

Earnings/Loss Per Share	12 Months Ended
	Jan. 31, 2016
Earnings Per Share [Abstract]
Earnings/Loss Per Share	Earnings/Loss Per Share Basic earnings/loss per share is computed by dividing net income (loss) by the weighted-average number of common shares outstanding for the fiscal period. Diluted earnings/loss per share is computed by giving effect to all potential weighted average dilutive common stock, including options, restricted stock units, warrants and the convertible senior notes. The dilutive effect of outstanding awards and convertible securities is reflected in diluted earnings per share by application of the treasury stock method. Diluted loss per share for fiscal 2016 , 2015 and 2014 are the same as basic loss per share as there is a net loss in these periods and inclusion of potentially issuable shares is anti-dilutive. A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Numerator: Net loss $ (47,426 ) $ (262,688 ) $ (232,175 ) Denominator: Weighted-average shares outstanding for basic loss per share 661,647 624,148 597,613 Effect of dilutive securities: Convertible senior notes 0 0 0 Employee stock awards 0 0 0 Warrants 0 0 0 Adjusted weighted-average shares outstanding and assumed conversions for diluted loss per share 661,647 624,148 597,613 The weighted-average number of shares outstanding used in the computation of basic and diluted earnings/loss per share does not include the effect of the following potential outstanding common stock. The effects of these potentially outstanding shares were not included in the calculation of diluted earnings/loss per share because the effect would have been anti-dilutive (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Employee Stock awards 26,615 22,157 19,664 Convertible senior notes 17,309 25,953 43,965 Warrants 17,309 37,517 44,253

Commitments

Commitments	12 Months Ended
	Jan. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments Letters of Credit As of January 31, 2016 , the Company had a total of $81.9 million in letters of credit outstanding substantially in favor of certain landlords for office space. These letters of credit renew annually and expire at various dates through December 2030. Leases The Company leases facilities space and certain fixed assets under non-cancelable operating and capital leases with various expiration dates. As of January 31, 2016 , the future minimum lease payments under non-cancelable operating and capital leases are as follows (in thousands): Capital Leases Operating Leases Financing Obligation, Building in Progress-Leased Facility(1) Fiscal Period: Fiscal 2017 $ 118,820 $ 356,527 $ 16,877 Fiscal 2018 122,467 319,878 21,107 Fiscal 2019 115,581 251,649 21,551 Fiscal 2020 201,543 202,514 21,995 Fiscal 2021 0 189,430 22,440 Thereafter 0 998,849 230,077 Total minimum lease payments 558,411 $ 2,318,847 $ 334,047 Less: amount representing interest (60,207 ) Present value of capital lease obligations $ 498,204 ______________ (1) Total Financing Obligation, Building in Progress-Leased Facility noted above represents the total obligation on the lease agreement noted in Note 3 “Property and Equipment” and includes $196.7 million that was recorded to Financing obligation, building in progress-leased facility, which is included in Other noncurrent liabilities on the balance sheet. The Company’s agreements for the facilities and certain services provide the Company with the option to renew. The Company’s future contractual obligations would change if the Company exercised these options. The terms of the lease agreements provide for rental payments on a graduated basis. The Company recognizes rent expense on a straight-line basis over the lease period and has accrued for rent expense incurred but not paid. Of the total operating lease commitment balance of $2.3 billion , approximately $2.0 billion is related to facilities space. The remaining commitment amount is related to computer equipment and furniture and fixtures. Rent expense for fiscal 2016 , 2015 and 2014 was $174.6 million , $162.8 million and $123.6 million , respectively.

Employee Benefit Plan

Employee Benefit Plan	12 Months Ended
	Jan. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Benefit Plan	Employee Benefit Plan The Company has a 401(k) plan covering all eligible employees in the United States and Canada. Since January 1, 2006, the Company has been contributing to the plan. Total Company contributions during fiscal 2016 , 2015 and 2014 , were $45.6 million , $38.1 million and $27.9 million , respectively.

Legal Proceedings and Claims

Legal Proceedings and Claims	12 Months Ended
	Jan. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings and Claims	Legal Proceedings and Claims In the ordinary course of business, the Company is or may be involved in various legal proceedings and claims related to alleged infringement of third-party patents and other intellectual property rights, commercial, corporate and securities, labor and employment, class actions, wage and hour, and other claims. The Company has been, and may in the future be, put on notice and/or sued by third parties for alleged infringement of their proprietary rights, including patent infringement. In July 2015, the Company and certain of its current and former directors were named as defendants in a purported shareholder derivative action in the Superior Court for the State of California, County of San Francisco. The plaintiff filed an amended version of this derivative complaint in November 2015. The derivative complaint alleged that excessive compensation was paid to such directors for their service and included allegations of breach of fiduciary duty and unjust enrichment, and sought restitution and disgorgement of a portion of the directors' compensation as well as reform of a Company equity plan. Because the complaint was derivative in nature, it did not seek monetary damages from the Company. In February 2016, the parties agreed to dismiss the complaint with prejudice as to the plaintiff and submitted a stipulation to that effect to the Court. In March 2016, the Court entered the order of dismissal. Neither the Company nor the individual defendants paid any consideration to the plaintiff. During fiscal 2015, the Company received a communication from a large technology company alleging that the Company infringed certain of its patents. The Company continues to analyze this claim and no litigation has been filed to date. There can be no assurance that this claim will not lead to litigation in the future. The resolution of this claim is not expected to have a material adverse effect on the Company's financial condition, but it could be material to operating results or cash flows or both of a particular quarter. In general, the resolution of a legal matter could prevent the Company from offering its service to others, could be material to the Company’s financial condition or cash flows, or both, or could otherwise adversely affect the Company’s operating results. The Company makes a provision for a liability relating to legal matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and adjusted to reflect the impacts of negotiations, estimated settlements, legal rulings, advice of legal counsel and other information and events pertaining to a particular matter. In management’s opinion, resolution of all current matters is not expected to have a material adverse impact on the Company’s consolidated results of operations, cash flows or financial position. However, depending on the nature and timing of any such dispute, an unfavorable resolution of a matter could materially affect the Company’s future results of operations or cash flows, or both, of a particular quarter.

Related-Party Transactions

Related-Party Transactions	12 Months Ended
	Jan. 31, 2016
Related Party Transactions [Abstract]
Related-Party Transactions	Related-Party Transactions In January 1999, the Salesforce.com Foundation, also referred to as the Foundation, was chartered on an idea of leveraging the Company’s people, technology, and resources to help improve communities around the world. The Company calls this integrated philanthropic approach the 1-1-1 model. Beginning in 2008, Salesforce.org, which is a non-profit public benefit corporation, was established to resell the Company's services to nonprofit organizations and certain higher education organizations. The Company’s chairman is the chairman of both the Foundation and Salesforce.org. The Company’s chairman holds one of the three Foundation board seats. The Company’s chairman, one of the Company’s employees and one of the Company’s board members hold three of Salesforce.org’s nine board seats. The Company does not control the Foundation’s or Salesforce.org's activities, and accordingly, the Company does not consolidate either of the related entities' statement of activities with its financial results. Since the Foundation’s and Salesforce.org’s inception, the Company has provided at no charge certain resources to those entities' employees such as office space, furniture, equipment, facilities, services, and other resources. The value of these items was approximately $1.2 million for the fiscal year 2016. The resource sharing agreement was amended in August 2015 to include resources outside of the United States and is more explicit about the types of resources that the Company will provide. Additionally, the Company has donated subscriptions of the Company’s services to other qualified non-profit organizations. The Company also allows Salesforce.org to resell the Company’s service to non-profit organizations and certain higher education entities. The Company does not charge Salesforce.org for these subscriptions, therefore revenue from subscriptions provided to non-profit organizations is donated back to the community through charitable grants made by the Foundation and Salesforce.org. The reseller agreement was amended in August 2015 to include additional customer segments and certain customers outside the U.S. and was amended in October 2015 to add an addendum with model clauses for the processing of personal data transferred from the European Economic Area. The value of the subscriptions pursuant to reseller agreements was approximately $69.9 million for the fiscal year 2016. The Company plans to continue these programs.

Subsequent Events

Subsequent Events	12 Months Ended
	Jan. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In February 2016, the Company acquired the outstanding stock of SteelBrick, Inc. (“SteelBrick”), a next generation quote-to-cash platform, delivered 100 percent natively on the Salesforce platform, that offers apps for automating the entire deal close process-from generating quotes and configuring orders to collecting cash. The Company acquired SteelBrick for its employees and product offerings. Beginning with fiscal quarter ended April 30, 2016, the Company will include the financial results of SteelBrick in its condensed consolidated financial statements from the date of the acquisition. The total estimated consideration for SteelBrick was over $300.0 million and primarily in shares. In February 2016, the Company entered into an agreement to sublease additional office space. The amounts associated with the agreement will be approximately $311.0 million over the approximately 12 year term of the agreement, beginning in the Company's first quarter of fiscal 2018.

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Jan. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	Selected Quarterly Financial Data (Unaudited) Selected summarized quarterly financial information for fiscal 2016 and 2015 is as follows: 1st 2nd 3rd 4th Fiscal Year (in thousands, except per share data) Fiscal 2016 Revenues $ 1,511,167 $ 1,634,684 $ 1,711,967 $ 1,809,398 $ 6,667,216 Gross profit 1,129,365 1,229,300 1,288,284 1,365,719 5,012,668 Income from operations 31,105 19,824 43,434 20,560 114,923 Net income (loss) $ 4,092 $ (852 ) $ (25,157 ) $ (25,509 ) $ (47,426 ) Basic net income (loss) per share $ 0.01 $ 0.00 $ (0.04 ) $ (0.04 ) $ (0.07 ) Diluted net income (loss) per share $ 0.01 $ 0.00 $ (0.04 ) $ (0.04 ) $ (0.07 ) Fiscal 2015 Revenues $ 1,226,772 $ 1,318,551 $ 1,383,655 $ 1,444,608 $ 5,373,586 Gross profit 934,467 1,010,720 1,050,444 1,088,685 4,084,316 Loss from operations (55,341 ) (33,434 ) (22,042 ) (34,816 ) (145,633 ) Net loss $ (96,911 ) $ (61,088 ) $ (38,924 ) $ (65,765 ) $ (262,688 ) Basic net loss per share $ (0.16 ) $ (0.10 ) $ (0.06 ) $ (0.10 ) $ (0.42 ) Diluted net loss per share $ (0.16 ) $ (0.10 ) $ (0.06 ) $ (0.10 ) $ (0.42 )

Schedule II Valuation and Quali

Schedule II Valuation and Qualifying Accounts	12 Months Ended
	Jan. 31, 2016
Valuation and Qualifying Accounts [Abstract]
Schedule II Valuation and Qualifying Accounts	Schedule II Valuation and Qualifying Accounts Description Balance at beginning of year Additions Deductions write-offs Balance at end of year Fiscal year ended January 31, 2016 Allowance for doubtful accounts $ 8,146,000 $ 14,738,000 $ (12,396,000 ) $ 10,488,000 Fiscal year ended January 31, 2015 Allowance for doubtful accounts $ 4,769,000 6,867,000 (3,490,000 ) $ 8,146,000 Fiscal year ended January 31, 2014 Allowance for doubtful accounts $ 1,853,000 7,963,000 (5,047,000 ) $ 4,769,000

Summary of Business and Signi26

Summary of Business and Significant Accounting Policies (Policies)	12 Months Ended
	Jan. 31, 2016
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year The Company’s fiscal year ends on January 31. References to fiscal 2016, for example, refer to the fiscal year ending January 31, 2016 .
Basis of Presentation	Basis of Presentation On March 20, 2013, the Company’s certificate of incorporation was amended to increase the number of authorized shares of common stock from 400.0 million to 1.6 billion in order to provide for a four -for-one stock split of the common stock effected in the form of a stock dividend. The record date for the stock split was April 3, 2013, and the additional shares were distributed on April 17, 2013. Each stockholder of record on the close of business on the record date received three additional shares of common stock for each share held. All share and per share data presented herein reflect the impact of the increase in authorized shares and the stock split, as appropriate.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions in the Company’s consolidated financial statements and notes thereto. Significant estimates and assumptions made by management include the determination of: • the best estimate of selling price of the deliverables included in multiple deliverable revenue arrangements, • the fair value of assets acquired and liabilities assumed for business combinations, • the recognition, measurement and valuation of current and deferred income taxes, • the fair value of convertible notes, • the fair value of stock awards issued and related forfeiture rates, • the useful lives of intangible assets, property and equipment and building and structural components, and • the valuation of strategic investments and the determination of other-than-temporary impairments. Actual results could differ materially from those estimates. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the result of which forms the basis for making judgments about the carrying values of assets and liabilities.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.
Segments	Segments The Company operates as one operating segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker, who is the chief executive officer, in deciding how to allocate resources and assessing performance. Over the past few years, the Company has completed several acquisitions. These acquisitions have allowed the Company to expand its offerings, presence and reach in various market segments of the enterprise cloud computing market. While the Company has offerings in multiple enterprise cloud computing market segments, the Company’s business operates in one operating segment because all of the Company's offerings operate on a single platform and are deployed in an identical way, and the Company’s chief operating decision maker evaluates the Company’s financial information and resources and assesses the performance of these resources on a consolidated basis. Since the Company operates in one operating segment, all required financial segment information can be found in the consolidated financial statements.
Concentrations of Credit Risk and Significant Customers	Concentrations of Credit Risk and Significant Customers The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities and trade accounts receivable. Although the Company deposits its cash with multiple financial institutions, its deposits, at times, may exceed federally insured limits. Collateral is not required for accounts receivable. The Company maintains an allowance for doubtful accounts receivable balances. This allowance is based upon historical loss patterns, the number of days that billings are past due and an evaluation of the potential risk of loss associated with delinquent accounts.
Revenue Recognition	Revenue Recognition The Company derives its revenues from two sources: (1) subscription revenues, which are comprised of subscription fees from customers accessing the Company’s enterprise cloud computing services and from customers paying for additional support beyond the standard support that is included in the basic subscription fees; and (2) related professional services such as process mapping, project management, implementation services and other revenue. “Other revenue” consists primarily of training fees. The Company commences revenue recognition when all of the following conditions are satisfied: • there is persuasive evidence of an arrangement; • the service has been or is being provided to the customer; • the collection of the fees is reasonably assured; and • the amount of fees to be paid by the customer is fixed or determinable. The Company’s subscription service arrangements are non-cancelable and do not contain refund-type provisions. Subscription and Support Revenues Subscription and support revenues are recognized ratably over the contract terms beginning on the commencement date of each contract, which is the date the Company’s service is made available to customers. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. Professional Services and Other Revenues The majority of the Company’s professional services contracts are on a time and material basis. When these services are not combined with subscription revenues as a single unit of accounting, as discussed below, these revenues are recognized as the services are rendered for time and material contracts, and when the milestones are achieved and accepted by the customer for fixed price contracts. Training revenues are recognized as the services are performed. Multiple Deliverable Arrangements The Company enters into arrangements with multiple deliverables that generally include multiple subscriptions, premium support and professional services. If the deliverables have standalone value upon delivery, the Company accounts for each deliverable separately. Subscription services have standalone value as such services are often sold separately. In determining whether professional services have standalone value, the Company considers the following factors for each professional services agreement: availability of the services from other vendors, the nature of the professional services, the timing of when the professional services contract was signed in comparison to the subscription service start date and the contractual dependence of the subscription service on the customer’s satisfaction with the professional services work. To date, the Company has concluded that all of the professional services included in multiple deliverable arrangements executed have standalone value. Multiple deliverables included in an arrangement are separated into different units of accounting and the arrangement consideration is allocated to the identified separate units based on a relative selling price hierarchy. The Company determines the relative selling price for a deliverable based on its vendor-specific objective evidence of selling price (“VSOE”), if available, or its best estimate of selling price (“BESP”), if VSOE is not available. The Company has determined that third-party evidence of selling price (“TPE”) is not a practical alternative due to differences in its service offerings compared to other parties and the availability of relevant third-party pricing information. The amount of revenue allocated to delivered items is limited by contingent revenue, if any. For certain professional services, the Company has established VSOE as a consistent number of standalone sales of these deliverables have been priced within a reasonably narrow range. The Company has not established VSOE for its subscription services due to lack of pricing consistency, the introduction of new services and other factors. Accordingly, the Company uses its BESP to determine the relative selling price for its subscription services. The Company determines BESP by considering its overall pricing objectives and market conditions. Significant pricing practices taken into consideration include the Company’s discounting practices, the size and volume of the Company’s transactions, the customer demographic, the geographic area where services are sold, price lists, its go-to-market strategy, historical standalone sales and contract prices. The determination of BESP is made through consultation with and approval by the Company’s management, taking into consideration the go-to-market strategy. As the Company’s go-to-market strategies evolve, the Company may modify its pricing practices in the future, which could result in changes in relative selling prices, including both VSOE and BESP.
Deferred Revenue	Deferred Revenue The deferred revenue balance does not represent the total contract value of annual or multi-year, non-cancelable subscription agreements. Deferred revenue primarily consists of billings or payments received in advance of revenue recognition from subscription services described above and is recognized as the revenue recognition criteria are met. The Company generally invoices customers in annual installments. The deferred revenue balance is influenced by several factors, including seasonality, the compounding effects of renewals, invoice duration, invoice timing, size and new business linearity within the quarter. Deferred revenue that will be recognized during the succeeding twelve month period is recorded as current deferred revenue and the remaining portion is recorded as noncurrent.
Deferred Commissions	Deferred Commissions Deferred commissions are the incremental costs that are directly associated with non-cancelable subscription contracts with customers and consist of sales commissions paid to the Company’s direct sales force. The commissions are deferred and amortized over the non-cancelable terms of the related customer contracts, which are typically 12 to 36 months . The commission payments are paid in full the month after the customer’s service commences. The deferred commission amounts are recoverable through the future revenue streams under the non-cancelable customer contracts. The Company believes this is the preferable method of accounting as the commission charges are so closely related to the revenue from the non-cancelable customer contracts that they should be recorded as an asset and charged to expense over the same period that the subscription revenue is recognized. Amortization of deferred commissions is included in marketing and sales expense in the accompanying consolidated statements of operations.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash and cash equivalents are stated at fair value.
Marketable Securities	Marketable Securities Management determines the appropriate classification of marketable securities at the time of purchase and reevaluates such determination at each balance sheet date. Securities are classified as available for sale and are carried at fair value, with the change in unrealized gains and losses, net of tax, reported as a separate component on the consolidated statements of comprehensive loss. Fair value is determined based on quoted market rates when observable or utilizing data points that are observable, such as quoted prices, interest rates and yield curves. Declines in fair value judged to be other-than-temporary on securities available for sale are included as a component of investment income. In order to determine whether a decline in value is other-than-temporary, the Company evaluates, among other factors: the duration and extent to which the fair value has been less than the carrying value and its intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of securities sold is based on the specific-identification method. Interest on securities classified as available for sale is also included as a component of investment income.
Fair Value Measurement	Fair Value Measurement The Company measures its cash equivalents, marketable securities and foreign currency derivative contracts at fair value. The additional disclosures regarding the Company’s fair value measurements are included in Note 2 “Investments”.
Property and Equipment	Property and Equipment Property and equipment are stated at cost. Depreciation is calculated on a straight-line basis over the estimated useful lives of those assets as follows: Computer, equipment and software 3 to 9 years Furniture and fixtures 5 years Leasehold improvements Shorter of the estimated lease term or 10 years Building and structural components Average weighted useful life of 32 years Building improvements 10 years When assets are retired or otherwise disposed of, the cost and accumulated depreciation and amortization are removed from their respective accounts and any loss on such retirement is reflected in operating expenses.
Capitalized Internal-Use Software Costs	Capitalized Internal-Use Software Costs The Company capitalizes costs related to its enterprise cloud computing services and certain projects for internal use incurred during the application development stage. Costs related to preliminary project activities and post implementation activities are expensed as incurred. Internal-use software is amortized on a straight-line basis over its estimated useful life, which is generally three to five years. Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets.
Goodwill, Intangible Assets, Long-Lived Assets and Impairment Assessments	Goodwill and Intangible Assets Impairment Assessments The Company evaluates and tests the recoverability of its goodwill for impairment at least annually during the fourth quarter or more often if and when circumstances indicate that goodwill may not be recoverable. Intangible assets are amortized over their useful lives. Each period the Company evaluates the estimated remaining useful life of its intangible assets and whether events or changes in circumstances warrant a revision to the remaining period of amortization. The carrying amounts of these assets are periodically reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. Recoverability of these assets is measured by comparison of the carrying amount of each asset to the future undiscounted cash flows the asset is expected to generate. If the undiscounted cash flows used in the test for recoverability are less than the carrying amount of these assets, then the carrying amount of such assets is reduced to fair value. Long- Lived Assets and Impairment Assessment The Company evaluates long-lived assets for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. This includes but is not limited to significant adverse changes in business climate, market conditions, or other events that indicate an asset's carrying amount may not be recoverable. If such review indicates that the carrying amount of long-lived assets is not recoverable, the carrying amount of such assets is reduced to fair value. There was no impairment of long-lived assets during fiscal 2016 , 2015 or 2014 .
Business Combinations	Business Combinations The Company uses its best estimates and assumptions to accurately assign fair value to the tangible and intangible assets acquired and liabilities assumed at the acquisition date. The Company’s estimates are inherently uncertain and subject to refinement. During the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed, with the corresponding offset to goodwill. In addition, uncertain tax positions and tax-related valuation allowances are initially established in connection with a business combination as of the acquisition date. The Company continues to collect information and reevaluates these estimates and assumptions quarterly and records any adjustments to the Company’s preliminary estimates to goodwill provided that the Company is within the measurement period. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company’s consolidated statements of operations.
Leases and Asset Retirement Obligations	Leases and Asset Retirement Obligations The Company categorizes leases at their inception as either operating or capital leases. In certain lease agreements, the Company may receive rent holidays and other incentives. The Company recognizes lease costs on a straight-line basis once control of the space is achieved, without regard to deferred payment terms such as rent holidays that defer the commencement date of required payments. Additionally, incentives received are treated as a reduction of costs over the term of the agreement. The Company establishes assets and liabilities for the present value of estimated future costs to retire long-lived assets at the termination or expiration of a lease. Such assets are depreciated over the lease period into operating expense, and the recorded liabilities are accreted to the future value of the estimated retirement costs. The Company records assets and liabilities for the estimated construction costs incurred under build-to-suit lease arrangements to the extent it is involved in the construction of structural improvements or takes construction risk prior to commencement of a lease.
Accounting for Stock-Based Compensation	The Company estimated its future stock price volatility considering both its observed option-implied volatilities and its historical volatility calculations. Management believes this is the best estimate of the expected volatility over the expected life of its stock options and stock purchase rights. The estimated life for the stock options was based on an analysis of historical exercise activity. The estimated life of the ESPP was based on the two purchase periods within each offering period. The risk-free interest rate is based on the rate for a U.S. government security with the same estimated life at the time of the option grant and the stock purchase rights. Accounting for Stock-Based Expense The Company recognizes stock-based expenses related to stock options and restricted stock awards on a straight-line basis over the requisite service period of the awards, which is generally the vesting term of four years . The aggregate stock compensation remaining to be amortized to costs and expenses will be recognized over a weighted average period of 2.0 years . The Company recognizes stock-based expenses related to shares issued pursuant to its 2004 Employee Stock Purchase Plan (“ESPP”) on a straight-line basis over the offering period, which is 12 months . Stock-based expenses are recognized net of estimated forfeiture activity. The estimated forfeiture rate applied is based on historical forfeiture rates. The Company does not anticipate paying any cash dividends in the foreseeable future and therefore uses an expected dividend yield of zero in the option pricing model.
Advertising Expenses	Advertising is expensed as incurred.
Income Taxes	Income Taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on temporary differences between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax laws is recognized in the consolidated statement of operations in the period that includes the enactment date. The Company’s tax positions are subject to income tax audits by multiple tax jurisdictions throughout the world. The Company recognizes the tax benefit of an uncertain tax position only if it is more likely than not that the position is sustainable upon examination by the taxing authority, solely based on its technical merits. The tax benefit recognized is measured as the largest amount of benefit which is greater than 50 percent likely to be realized upon settlement with the taxing authority. The Company recognizes interest accrued and penalties related to unrecognized tax benefits in the income tax provision. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts that are more likely than not expected to be realized based on the weighting of positive and negative evidence. Future realization of deferred tax assets ultimately depends on the existence of sufficient taxable income of the appropriate character (for example, ordinary income or capital gain) within the carryback or carryforward periods available under the applicable tax law. The Company regularly reviews the deferred tax assets for recoverability based on historical taxable income, projected future taxable income, the expected timing of the reversals of existing temporary differences and tax planning strategies. The Company’s judgments regarding future profitability may change due to many factors, including future market conditions and the ability to successfully execute its business plans and/or tax planning strategies. Should there be a change in the ability to recover deferred tax assets, the tax provision would increase or decrease in the period in which the assessment is changed.
Foreign Currency Translation	Foreign Currency Translation The functional currency of the Company’s major foreign subsidiaries is generally the local currency. Adjustments resulting from translating foreign functional currency financial statements into U.S. dollars are recorded as a separate component on the consolidated statements of comprehensive loss. Foreign currency transaction gains and losses are included in net loss for the period. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenues and expenses are translated at the average exchange rate during the period. Equity transactions are translated using historical exchange rates.
Warranties and Indemnification	Warranties and Indemnification The Company’s enterprise cloud computing services are typically warranted to perform in a manner consistent with general industry standards that are reasonably applicable and materially in accordance with the Company’s online help documentation under normal use and circumstances. The Company’s arrangements generally include certain provisions for indemnifying customers against liabilities if its products or services infringe a third party’s intellectual property rights. To date, the Company has not incurred any material costs as a result of such obligations and has not accrued any liabilities related to such obligations in the accompanying consolidated financial statements. The Company has also agreed to indemnify its directors and executive officers for costs associated with any fees, expenses, judgments, fines and settlement amounts incurred by any of these persons in any action or proceeding to which any of those persons is, or is threatened to be, made a party by reason of the person’s service as a director or officer, including any action by the Company, arising out of that person’s services as the Company’s director or officer or that person’s services provided to any other company or enterprise at the Company’s request. The Company maintains director and officer insurance coverage that would generally enable the Company to recover a portion of any future amounts paid. The Company may also be subject to indemnification obligations by law with respect to the actions of its employees under certain circumstances and in certain jurisdictions.
New Accounting Pronouncement	New Accounting Pronouncements In May 2014 , the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”) which amended the existing FASB Accounting Standards Codification. This standard establishes a principle for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. The standard also provides guidance on the recognition of costs related to obtaining and fulfilling customer contracts. The FASB deferred the effective date for the new revenue reporting standard for entities reporting under U.S. GAAP for one year. In accordance with the deferral, ASU 2014-09 will be effective for fiscal 2019 , including interim periods within that reporting period. The Company is currently in the process of assessing the adoption methodology, which allows the amendment to be applied retrospectively to each prior period presented, or with the cumulative effect recognized as of the date of initial application. The Company is also evaluating the impact of the adoption of ASU 2014-09 on its condensed consolidated financial statements and has not determined whether the effect will be material to either its revenue results or its deferred commissions balances. In September 2015, the FASB issued Accounting Standards Update No. 2015-16, “Simplifying the Accounting for Measurement-Period Adjustments (Topic 805)” (“ASU 2015-16”) which eliminates the requirement to restate prior period financial statements for measurement period adjustments in business combinations. ASU 2015-16 requires that the cumulative impact of a measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified. The new standard is effective for interim and annual periods beginning after December 15, 2015 and early adoption is permitted. The Company is evaluating the impact of the adoption of ASU 2015-16 on its consolidated financial statements. In November 2015, the FASB issued Accounting Standards Update No. 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes” (“ASU 2015-17”) which requires all deferred income taxes to be classified as noncurrent on the balance sheet. The amendments would be effective for annual periods beginning after December 15, 2016. The Company early adopted this standard retrospectively for all prior periods and reclassified all current deferred tax assets and liabilities to noncurrent deferred tax assets and liabilities on the consolidated balance sheets for all periods presented. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”), which requires lessees to put most leases on their balance sheets but recognize the expenses on their income statements in a manner similar to current practice. ASU 2016-02 states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. The new standard is effective for interim and annual periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently evaluating the impact to its consolidated financial statements.
Reclassifications	Reclassifications Certain reclassifications to the fiscal 2015 balances were made to conform to the current period presentation in the Balance Sheet. These reclassifications include strategic investments and other assets, net.

Summary of Business and Signi27

Summary of Business and Significant Accounting Policies (Tables)	12 Months Ended
	Jan. 31, 2016
Accounting Policies [Abstract]
Revenues By Geographical Region	Revenues by geographical region are as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Americas $ 4,910,745 $ 3,868,329 $ 2,899,837 Europe 1,162,808 984,919 741,220 Asia Pacific 593,663 520,338 429,946 $ 6,667,216 $ 5,373,586 $ 4,071,003
Schedule Of Property And Equipment Estimated Useful Lives	Property and equipment are stated at cost. Depreciation is calculated on a straight-line basis over the estimated useful lives of those assets as follows: Computer, equipment and software 3 to 9 years Furniture and fixtures 5 years Leasehold improvements Shorter of the estimated lease term or 10 years Building and structural components Average weighted useful life of 32 years Building improvements 10 years
Schedule Of Assumptions Used To Calculate Fair Value Of Options Granted	The fair value of each stock option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions and fair value per share: Fiscal Year Ended January 31, Stock Options 2016 2015 2014 Volatility 32-37 % 37 % 37-43 % Estimated life 3.5 years 3.6 years 3.4 years Risk-free interest rate 1.09-1.42 % 1.12-1.53 % 0.48-1.21 % Weighted-average fair value per share of grants $ 20.22 $ 17.20 $ 14.08 Fiscal Year Ended January 31, ESPP 2016 2015 2014 Volatility 30-34 % 32-35 % 31-35 % Estimated life 0.75 years 0.75 years 0.75 years Risk-free interest rate 0.06-0.76 % 0.07-0.23 % 0.07-0.10 % Weighted-average fair value per share of grants $ 19.49 $ 14.56 $ 10.30

Investments (Tables)

Investments (Tables)	12 Months Ended
	Jan. 31, 2016
Investments Schedule [Abstract]
Schedule of Marketable Securities	At January 31, 2016 , marketable securities consisted of the following (in thousands): Investments classified as Marketable Securities Amortized Cost Unrealized Gains Unrealized Losses Fair Value Corporate notes and obligations $ 949,266 $ 1,398 $ (2,983 ) $ 947,681 U.S. treasury securities 157,625 375 (56 ) 157,944 Mortgage backed obligations 104,242 106 (323 ) 104,025 Asset backed securities 271,292 186 (226 ) 271,252 Municipal securities 44,934 209 (6 ) 45,137 Foreign government obligations 18,014 42 (5 ) 18,051 U.S. agency obligations 16,076 16 (6 ) 16,086 Covered bonds 6,690 148 0 6,838 Total marketable securities $ 1,568,139 $ 2,480 $ (3,605 ) $ 1,567,014 At January 31, 2015 , marketable securities consisted of the following (in thousands): Investments classified as Marketable Securities Amortized Cost Unrealized Gains Unrealized Losses Fair Value Corporate notes and obligations $ 605,724 $ 3,031 $ (481 ) $ 608,274 U.S. treasury securities 73,226 257 (1 ) 73,482 Mortgage backed obligations 44,181 159 (415 ) 43,925 Asset backed securities 120,049 131 (43 ) 120,137 Municipal securities 36,447 115 (25 ) 36,537 Foreign government obligations 12,023 278 0 12,301 U.S. agency obligations 19,488 26 (4 ) 19,510 Covered bonds 66,816 1,185 0 68,001 Total marketable securities $ 977,954 $ 5,182 $ (969 ) $ 982,167
Schedule of Short-Term and Long-Term Marketable Securities	The duration of the investments classified as marketable securities is as follows (in thousands): As of January 31, January 31, Recorded as follows: Short-term (due in one year or less) $ 183,018 $ 87,312 Long-term (due after one year) 1,383,996 894,855 $ 1,567,014 $ 982,167
Schedule of Marketable Securities in a Unrealized Loss Position	As of January 31, 2016 , the following marketable securities were in an unrealized loss position (in thousands): Less than 12 Months 12 Months or Greater Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate notes and obligations $ 531,258 $ (2,472 ) $ 48,047 $ (511 ) $ 579,305 $ (2,983 ) U.S. treasury securities 50,434 (56 ) 0 0 50,434 (56 ) Mortgage backed obligations 61,055 (274 ) 4,780 (49 ) 65,835 (323 ) Asset backed securities 135,917 (199 ) 5,490 (27 ) 141,407 (226 ) Municipal securities 4,553 (4 ) 1,959 (2 ) 6,512 (6 ) U.S. agency obligations 5,989 (6 ) 0 0 5,989 (6 ) Foreign government obligations 5,523 (5 ) 0 0 5,523 (5 ) $ 794,729 $ (3,016 ) $ 60,276 $ (589 ) $ 855,005 $ (3,605 )
Schedule of Assets and Liabilities Measured at Fair Value an a Recurring Basis	The following table presents information about the Company’s assets and liabilities that are measured at fair value as of January 31, 2016 and indicates the fair value hierarchy of the valuation (in thousands): Description Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balances as of January 31, 2016 Cash equivalents (1): Time deposits $ 0 $ 236,798 $ 0 $ 236,798 Money market mutual funds 216,107 0 0 216,107 Commercial Paper 0 159,230 0 159,230 Agency and sovereign paper 0 13,599 0 13,599 Marketable securities: Corporate notes and obligations 0 947,681 0 947,681 U.S. treasury securities 0 157,944 0 157,944 Mortgage backed obligations 0 104,025 0 104,025 Asset backed securities 0 271,252 0 271,252 Municipal securities 0 45,137 0 45,137 Foreign government obligations 0 18,051 0 18,051 U.S. agency obligations 0 16,086 0 16,086 Covered bonds 0 6,838 0 6,838 Foreign currency derivative contracts (2) 0 4,731 0 4,731 Total Assets $ 216,107 $ 1,981,372 $ 0 $ 2,197,479 Liabilities Foreign currency derivative contracts (3) $ 0 $ 14,025 $ 0 $ 14,025 Total Liabilities $ 0 $ 14,025 $ 0 $ 14,025 _____________ (1) Included in “cash and cash equivalents” in the accompanying consolidated balance sheet as of January 31, 2016 , in addition to $532.6 million of cash. (2) Included in “prepaid expenses and other current assets” in the accompanying consolidated balance sheet as of January 31, 2016 . (3) Included in “accounts payable, accrued expenses and other liabilities” in the consolidated balance sheet as of January 31, 2016 . The following table presents information about the Company’s assets and liabilities that are measured at fair value as of January 31, 2015 and indicates the fair value hierarchy of the valuation (in thousands): Description Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balances as of January 31, 2015 Cash equivalents (1): Time deposits $ 0 $ 292,487 $ 0 $ 292,487 Money market mutual funds 13,983 0 0 13,983 Marketable securities: Corporate notes and obligations 0 608,274 0 608,274 U.S. treasury securities 0 73,482 0 73,482 Mortgage backed obligations 0 43,925 0 43,925 Asset backed securities 0 120,137 0 120,137 Municipal securities 0 36,537 0 36,537 Foreign government obligations 0 12,301 0 12,301 U.S. agency obligations 0 19,510 0 19,510 Covered bonds 0 68,001 0 68,001 Foreign currency derivative contracts (2) 0 10,611 0 10,611 Total Assets $ 13,983 $ 1,285,265 $ 0 $ 1,299,248 Liabilities Foreign currency derivative contracts (3) $ 0 $ 5,694 $ 0 $ 5,694 Total Liabilities $ 0 $ 5,694 $ 0 $ 5,694 ______________ (1) Included in “cash and cash equivalents” in the accompanying consolidated balance sheet as of January 31, 2015 , in addition to $601.6 million of cash. (2) Included in “prepaid expenses and other current assets” in the accompanying consolidated balance sheet as of January 31, 2015 . (3) Included in “accounts payable, accrued expenses and other liabilities” in the accompanying consolidated balance sheet as of January 31, 2015 .
Schedule of Outstanding Foreign Currency Derivative Contracts Related Primarily to Intercompany Receivables and Payables	Details on outstanding foreign currency derivative contracts related primarily to intercompany receivables and payables are presented below (in thousands): As of January 31, 2016 2015 Notional amount of foreign currency derivative contracts $ 1,274,515 $ 942,086 Fair value of foreign currency derivative contracts $ (9,294 ) $ 4,917
Fair Value of Outstanding Derivative Instruments	The fair value of the Company’s outstanding derivative instruments are summarized below (in thousands): Fair Value of Derivative Instruments As of January 31, Balance Sheet Location 2016 2015 Derivative Assets Derivatives not designated as hedging instruments: Foreign currency derivative contracts Prepaid expenses and other current assets $ 4,731 $ 10,611 Derivative Liabilities Derivatives not designated as hedging instruments: Foreign currency derivative contracts Accounts payable, accrued expenses and other liabilities $ 14,025 $ 5,694
Schedule of The Effect of The Derivative Instruments Not Designated as Hedging Instruments on the Condensed Consolidated Statements of Operations	The effect of the derivative instruments not designated as hedging instruments on the consolidated statements of operations during fiscal 2016 , 2015 and 2014 , respectively, are summarized below (in thousands): Derivatives Not Designated as Hedging Instruments Gains (losses) on Derivative Instruments Recognized in Income Fiscal Year Ended January 31, Location 2016 2015 2014 Foreign currency derivative contracts Other expense $ (25,786 ) $ (1,186 ) $ 108
Schedule of Strategic Investments	Strategic investments consisted of the following (in thousands): Description Balance at beginning of year Additions Sales, dispositions and fair market value adjustments (1) Balance at end of year Fiscal year ended January 31, 2016 Strategic investments $ 175,774 386,219 (41,272 ) $ 520,721 Fiscal year ended January 31, 2015 Strategic investments $ 92,489 101,774 (18,489 ) $ 175,774 (1) Amounts include the release of the cost-basis and the current unrealized gain or loss balance recorded in accumulated other comprehensive loss when shares of a publicly-held investment are sold, disposition-related reductions of a cost-basis investment if a privately-held company within the portfolio is acquired by another company, fair market value adjustments such as cost basis reductions related to impairments that are other-than-temporary and unrealized gains or losses related to investments held in publicly traded companies.
Schedule of Components of Investment Income	Investment income consists of interest income, realized gains, and realized losses on the Company’s cash, cash equivalents and marketable securities. The components of investment income are presented below (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Interest income $ 14,146 $ 10,129 $ 9,512 Realized gains 3,287 517 5,952 Realized losses (2,092 ) (608 ) (5,246 ) Total investment income $ 15,341 $ 10,038 $ 10,218

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Jan. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	Property and equipment, net consisted of the following (in thousands): As of January 31, 2016 2015 Land $ 183,888 $ 0 Buildings 614,081 125,289 Computers, equipment and software 1,281,766 1,171,762 Furniture and fixtures 82,242 71,881 Leasehold improvements 473,688 376,761 2,635,665 1,745,693 Less accumulated depreciation and amortization (919,837 ) (619,827 ) $ 1,715,828 $ 1,125,866

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Jan. 31, 2016
Business Acquisition [Line Items]
Schedule of Goodwill	Goodwill consisted of the following (in thousands): Balance as of January 31, 2014 $ 3,500,823 RelateIQ 289,857 Finalization of acquisition date fair values (8,020 ) Balance as of January 31, 2015 3,782,660 Other acquisitions 68,655 Finalization of acquisition date fair values (1,378 ) Balance as of January 31, 2016 $ 3,849,937
Intangible Assets Acquired From Business Combinations	Intangible assets acquired resulting from business combinations are as follows as of January 31, 2016 (in thousands): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life Acquired developed technology $ 684,260 $ (451,889 ) $ 232,371 3.4 Customer relationships 410,763 (160,866 ) 249,897 5.2 Trade name and trademark 38,980 (38,980 ) 0 0.0 Territory rights and other 12,372 (8,585 ) 3,787 2.6 50 Fremont lease intangibles 7,713 (3,762 ) 3,951 2.3 Total $ 1,154,088 $ (664,082 ) $ 490,006 4.3 Intangible assets acquired resulting from business combinations were as follows as of January 31, 2015 (in thousands): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life Acquired developed technology $ 674,160 $ (371,997 ) $ 302,163 4.3 Customer relationships 409,603 (107,245 ) 302,358 6.1 Trade name and trademark 38,980 (17,142 ) 21,838 1.0 Territory rights 12,355 (6,522 ) 5,833 3.1 Total $ 1,135,098 $ (502,906 ) $ 632,192 5.0
Expected Future Amortization Expense for Purchased Intangible Assets	The expected future amortization expense for purchased intangible assets as of January 31, 2016 is as follows (in thousands): Fiscal Period: Fiscal 2017 $ 131,491 Fiscal 2018 118,762 Fiscal 2019 101,425 Fiscal 2020 73,268 Fiscal 2021 45,859 Thereafter 19,201 Total amortization expense $ 490,006
50 Fremont Street [Member]
Business Acquisition [Line Items]
Schedule of Consideration Transferred	The purchase consideration for the corporate headquarters building was as follows (in thousands): Fair Value Cash $ 435,189 Loan assumed on 50 Fremont 200,000 Prorations due to ownership transfer midmonth 2,411 Total purchase consideration $ 637,600
Schedule of Acquired Finite-Lived Intangible Assets	The following table summarizes the fair values of net tangible and intangible assets acquired (in thousands): Fair Value Building $ 435,390 Land 183,888 Termination of salesforce operating lease 9,483 Acquired lease intangibles 7,590 Loan assumed on 50 Fremont fair market value adjustment 1,249 Total $ 637,600
RelateIQ, Inc. [Member]
Business Acquisition [Line Items]
Schedule of Consideration Transferred	The acquisition date fair value of the consideration transferred for RelateIQ was approximately $340.2 million , which consisted of the following (in thousands, except share data): Fair Value Cash $ 1,123 Common stock (6,320,735 shares) 338,033 Fair value of stock options and restricted stock awards assumed 1,050 Total $ 340,206
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of assets acquired and liabilities assumed as of the date of acquisition (in thousands): Fair Value Cash $ 39,194 Intangible assets 16,200 Goodwill 289,857 Current and noncurrent liabilities (4,700 ) Deferred tax liability (345 ) Net assets acquired $ 340,206
Schedule of Acquired Finite-Lived Intangible Assets	The following table sets forth the components of identifiable intangible assets acquired (in thousands) and their estimated useful lives as of the date of acquisition: Fair Value Useful Life Developed technology $ 14,470 7 years Customer relationships and other purchased intangible assets 1,730 1-3 years Total $ 16,200

Debt (Tables)

Debt (Tables)	12 Months Ended
	Jan. 31, 2016
Debt Disclosure [Abstract]
Summary of Convertible Senior Notes	Certain terms of the conversion features of the 0.25% Senior Notes are as follows: Conversion Rate per $1,000 Par Value Initial Conversion Price per Share Convertible Date 0.25% Senior Notes 15.0512 $ 66.44 January 1, 2018 Convertible Senior Notes Par Value Outstanding Equity Component Recorded at Issuance Liability Component of Par Value as of January 31, (in thousands) 2016 2015 0.25% Convertible Senior Notes due April 1, 2018 $ 1,150,000 $ 122,421 (1) $ 1,095,059 $ 1,070,692 ___________ (1) This amount represents the equity component recorded at the initial issuance of the 0.25% convertible senior notes.
Schedule of Convertible Senior Notes	The 0.25% Senior Notes consisted of the following (in thousands): As of January 31, January 31, Liability component : Principal: 0.25% Senior Notes (1) $ 1,150,000 $ 1,150,000 Less: debt discount, net 0.25% Senior Notes (2) (54,941 ) (79,308 ) Net carrying amount $ 1,095,059 $ 1,070,692 (1) The effective interest rates of the 0.25% Senior Notes is 2.53% . These interest rates were based on the interest rates of a similar liability at the time of issuance that did not have an associated convertible feature. (2) Included in the consolidated balance sheets within Convertible 0.25% Senior Notes (which is classified as a noncurrent liability) and is amortized over the life of the 0.25% Senior Notes using the effective interest rate method.
Summary of Hedge Notes	Note Hedges To minimize the impact of potential economic dilution upon conversion of the Notes, the Company entered into convertible note hedge transactions with respect to its common stock (the “Note Hedges”). (in thousands, except for shares) Date Purchase Shares 0.25% Note Hedges March 2013 $ 153,800 17,308,880
Components of Warrants	Warrants Date Proceeds (in thousands) Shares Strike Price 0.25% Warrants March 2013 $ 84,800 17,308,880 $ 90.40
Schedule of Interest Expense	The following table sets forth total interest expense recognized related to the Notes, the Term Loan and the Credit Facility prior to capitalization of interest (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Contractual interest expense $ 11,879 $ 10,224 $ 10,195 Amortization of debt issuance costs 4,105 4,622 4,470 Amortization of debt discount 24,504 36,575 46,942 $ 40,488 $ 51,421 $ 61,607

Other Balance Sheet Accounts (T

Other Balance Sheet Accounts (Tables)	12 Months Ended
	Jan. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following (in thousands): As of January 31, January 31, Prepaid income taxes $ 22,044 $ 21,514 Customer contract asset 1,423 16,620 Other taxes receivable 27,341 27,540 Prepaid expenses and other current assets 199,786 179,352 $ 250,594 $ 245,026
Schedule of Capitalized Software Costs	Capitalized software consisted of the following (in thousands): As of January 31, January 31, Capitalized internal-use software development costs, net of accumulated amortization of $186,251 and $136,314, respectively $ 123,065 $ 96,617 Acquired developed technology, net of accumulated amortization of $481,118 and $392,736, respectively 261,193 336,781 $ 384,258 $ 433,398
Schedule of Other Assets	Other assets consisted of the following (in thousands): As of January 31, January 31, Deferred income taxes, noncurrent, net $ 15,986 $ 16,948 Long-term deposits 19,469 19,715 Purchased intangible assets, net of accumulated amortization of $212,248 and $130,968, respectively 258,580 329,971 Acquired intellectual property, net of accumulated amortization of $22,439 and $15,695, respectively 10,565 15,879 Customer contract asset 93 1,447 Other 74,069 76,259 $ 378,762 $ 460,219
Schedule of Accrued Expenses and Other Current Liabilities	Accounts payable, accrued expenses and other liabilities consisted of the following (in thousands): As of January 31, January 31, Accounts payable $ 71,481 $ 95,537 Accrued compensation 554,502 457,102 Accrued other liabilities 447,729 321,032 Accrued income and other taxes payable 205,781 184,844 Accrued professional costs 33,814 16,889 Customer liability, current (1) 6,558 13,084 Accrued rent 14,071 14,847 Financing obligation, building in progress-leased facility, current 15,402 0 $ 1,349,338 $ 1,103,335 (1) Customer liability reflects the legal obligation to provide future services that are contractually committed to ExactTarget’s existing customers but unbilled as of the acquisition date in July 2013. As these services are invoiced, this balance will decrease and deferred revenue will increase.
Schedule of Other Noncurrent Liabilities	Other noncurrent liabilities consisted of the following (in thousands): As of January 31, January 31, Deferred income taxes and income taxes payable $ 85,996 $ 66,541 Customer liability, noncurrent 66 1,026 Financing obligation, building in progress-leased facility 196,711 125,289 Long-term lease liabilities and other 550,292 701,612 $ 833,065 $ 894,468

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Jan. 31, 2016
Equity [Abstract]
Schedule Of Stock Activity	Stock activity excluding the ESPP is as follows: Options Outstanding Shares Available for Grant Outstanding Stock Options Weighted- Average Exercise Price Aggregate Intrinsic Value Balance as of January 31, 2015 30,789,538 29,458,361 $ 44.36 Increase in shares authorized: 2013 Equity Incentive Plan 39,148,364 0 0.00 2014 Inducement Equity Incentive Plan 231,871 0 0.00 Options granted under all plans (7,119,327 ) 7,119,327 78.85 Restricted stock activity (15,905,661 ) 0 0.00 Performance restricted stock units (411,471 ) 0 0.00 Stock grants to board and advisory board members (192,298 ) 0 0.00 Exercised 0 (8,188,987 ) 35.53 Plan shares expired (1,791,011 ) 0 0.00 Canceled 2,129,903 (2,129,903 ) 46.87 Balance as of January 31, 2016 46,879,908 26,258,798 $ 56.26 $ 386,893,769 Vested or expected to vest 23,956,184 $ 54.97 $ 375,375,548 Exercisable as of January 31, 2016 9,763,563 $ 41.99 $ 254,557,559
Schedule Of Stock Options Outstanding	The following table summarizes information about stock options outstanding as of January 31, 2016 : Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding Weighted- Average Remaining Contractual Life (Years) Weighted- Average Exercise Price Number of Shares Weighted- Average Exercise Price $0.86 to $37.95 4,555,639 2.0 $ 29.18 3,838,627 $ 28.42 $38.03 to $52.14 2,556,681 2.3 39.94 1,826,462 39.62 $52.30 3,800,524 4.8 52.30 1,852,072 52.30 $53.60 to $57.79 1,466,601 5.4 55.29 459,196 55.31 $59.34 6,313,261 5.8 59.34 1,739,344 59.34 $59.37 to $77.86 1,925,609 6.2 68.04 47,862 63.07 $80.99 5,640,483 6.8 80.99 0 0.00 26,258,798 4.9 $ 56.26 9,763,563 $ 41.99
Schedule Of Restricted Stock Activity	Restricted stock activity is as follows: Restricted Stock Outstanding Outstanding Weighted- Average Exercise Price Aggregate Intrinsic Value Balance as of January 31, 2014 24,653,578 $ 0.001 Granted- restricted stock units and awards 11,170,913 0.001 Canceled (3,174,976 ) 0.001 Vested and converted to shares (9,505,507 ) 0.001 Balance as of January 31, 2015 23,144,008 $ 0.001 Granted- restricted stock units and awards 9,736,623 0.001 Granted- performance stock units 191,382 0.001 Canceled (2,715,332 ) 0.001 Vested and converted to shares (9,062,096 ) 0.001 Balance as of January 31, 2016 21,294,585 $ 0.001 $ 1,449,309,455 Expected to vest 17,846,945 $ 1,214,663,077
Schedule Of Shares Of Common Stock Available For Future Issuance Under Stock Option Plans	The following number of shares of common stock were reserved and available for future issuance at January 31, 2016 : Options outstanding 26,258,798 Restricted stock awards and units and performance stock units outstanding 21,294,585 Stock available for future grant: 2013 Equity Incentive Plan 46,233,360 2014 Inducement Equity Incentive Plan 646,548 2004 Employee Stock Purchase Plan 6,844,796 Convertible senior notes 17,308,880 Warrants 17,308,880 135,895,847

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Domestic And Foreign Components of Income (Loss) Before Provision (Benefit) For Income Taxes	The domestic and foreign components of income (loss) before provision for (benefit from) income taxes consisted of the following (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Domestic $ (49,558 ) $ (211,253 ) $ (326,392 ) Foreign 113,837 (1,832 ) (31,543 ) $ 64,279 $ (213,085 ) $ (357,935 )
Schedule of Income Taxes Provision (Benefit)	The provision for (benefit from) income taxes consisted of the following (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Current: Federal $ 40,723 $ 893 $ (10,431 ) State 13,023 1,388 (245 ) Foreign 57,347 50,493 39,784 Total 111,093 52,774 29,108 Deferred: Federal 1,453 8,771 (128,798 ) State (426 ) (10,830 ) (22,012 ) Foreign (415 ) (1,112 ) (4,058 ) Total 612 (3,171 ) (154,868 ) Provision for (benefit from) income taxes $ 111,705 $ 49,603 $ (125,760 )
Reconciliation of Statutory Federal Income Tax Rate	A reconciliation of income taxes at the statutory federal income tax rate to the provision for (benefit from) income taxes included in the accompanying consolidated statements of operations is as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 U.S. federal taxes at statutory rate $ 22,498 $ (74,580 ) $ (125,277 ) State, net of the federal benefit (5,260 ) (5,332 ) (10,780 ) Foreign taxes in excess of the U.S. statutory rate (25,780 ) 29,880 33,412 Change in valuation allowance 139,565 100,143 (25,048 ) Tax credits (48,943 ) (28,056 ) (22,293 ) Non-deductible expenses 26,841 26,224 21,407 Tax expense/(benefit) from acquisitions 1,584 2,341 1,811 Other, net 1,200 (1,017 ) 1,008 Provision for (benefit from) income taxes $ 111,705 $ 49,603 $ (125,760 )
Significant Components of Deferred Tax Assets And Liabilities	Significant components of the Company’s deferred tax assets and liabilities were as follows (in thousands): As of January 31, 2016 2015 Deferred tax assets: Net operating loss carryforwards $ 260,015 $ 252,858 Deferred stock-based expense 89,532 96,753 Tax credits 211,997 152,715 Deferred rent expense 49,790 58,849 Accrued liabilities 122,950 92,506 Deferred revenue 14,261 15,664 Basis difference on strategic and other investments 26,202 24,637 Financing obligation 127,198 84,095 Deferred cost sharing adjustment 30,351 0 Other 22,845 20,017 Total deferred tax assets 955,141 798,094 Less valuation allowance (439,971 ) (293,097 ) Deferred tax assets, net of valuation allowance 515,170 504,997 Deferred tax liabilities: Deferred commissions (121,071 ) (107,197 ) Purchased intangibles (160,200 ) (213,920 ) Unrealized gains on investments (2,858 ) (1,793 ) Depreciation and amortization (224,435 ) (171,908 ) Other (2,207 ) (3,157 ) Total deferred tax liabilities (510,771 ) (497,975 ) Net deferred tax assets $ 4,399 $ 7,022
Schedule of Unrecognized Tax Benefits	A reconciliation of the beginning and ending balance of total unrecognized tax benefits for fiscal years 2016 , 2015 and 2014 is as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Balance as of February 1, $ 146,188 $ 102,275 $ 75,144 Tax positions taken in prior period: Gross increases 7,456 17,938 8,420 Gross decreases (7,264 ) (1,967 ) (4,466 ) Tax positions taken in current period: Gross increases 38,978 34,226 27,952 Settlements (8,684 ) 0 0 Lapse of statute of limitations (781 ) (1,224 ) (5,205 ) Currency translation effect (3,152 ) (5,060 ) 430 Balance as of January 31, $ 172,741 $ 146,188 $ 102,275

Earnings_Loss Per Share (Tables

Earnings/Loss Per Share (Tables)	12 Months Ended
	Jan. 31, 2016
Earnings Per Share [Abstract]
Reconciliation of Denominator Used In Calculation of Basic And Diluted Loss Per Share	A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Numerator: Net loss $ (47,426 ) $ (262,688 ) $ (232,175 ) Denominator: Weighted-average shares outstanding for basic loss per share 661,647 624,148 597,613 Effect of dilutive securities: Convertible senior notes 0 0 0 Employee stock awards 0 0 0 Warrants 0 0 0 Adjusted weighted-average shares outstanding and assumed conversions for diluted loss per share 661,647 624,148 597,613
Shares Excluded From Diluted Earnings Or Loss Per Share	The weighted-average number of shares outstanding used in the computation of basic and diluted earnings/loss per share does not include the effect of the following potential outstanding common stock. The effects of these potentially outstanding shares were not included in the calculation of diluted earnings/loss per share because the effect would have been anti-dilutive (in thousands): Fiscal Year Ended January 31, 2016 2015 2014 Employee Stock awards 26,615 22,157 19,664 Convertible senior notes 17,309 25,953 43,965 Warrants 17,309 37,517 44,253

Commitments (Tables)

Commitments (Tables)	12 Months Ended
	Jan. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule Of Future Minimum Lease Payments Under Non-Cancelable Operating And Capital Leases	As of January 31, 2016 , the future minimum lease payments under non-cancelable operating and capital leases are as follows (in thousands): Capital Leases Operating Leases Financing Obligation, Building in Progress-Leased Facility(1) Fiscal Period: Fiscal 2017 $ 118,820 $ 356,527 $ 16,877 Fiscal 2018 122,467 319,878 21,107 Fiscal 2019 115,581 251,649 21,551 Fiscal 2020 201,543 202,514 21,995 Fiscal 2021 0 189,430 22,440 Thereafter 0 998,849 230,077 Total minimum lease payments 558,411 $ 2,318,847 $ 334,047 Less: amount representing interest (60,207 ) Present value of capital lease obligations $ 498,204 ______________ (1) Total Financing Obligation, Building in Progress-Leased Facility noted above represents the total obligation on the lease agreement noted in Note 3 “Property and Equipment” and includes $196.7 million that was recorded to Financing obligation, building in progress-leased facility, which is included in Other noncurrent liabilities on the balance sheet.

Selected Quarterly Financial 37

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Jan. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	Selected summarized quarterly financial information for fiscal 2016 and 2015 is as follows: 1st 2nd 3rd 4th Fiscal Year (in thousands, except per share data) Fiscal 2016 Revenues $ 1,511,167 $ 1,634,684 $ 1,711,967 $ 1,809,398 $ 6,667,216 Gross profit 1,129,365 1,229,300 1,288,284 1,365,719 5,012,668 Income from operations 31,105 19,824 43,434 20,560 114,923 Net income (loss) $ 4,092 $ (852 ) $ (25,157 ) $ (25,509 ) $ (47,426 ) Basic net income (loss) per share $ 0.01 $ 0.00 $ (0.04 ) $ (0.04 ) $ (0.07 ) Diluted net income (loss) per share $ 0.01 $ 0.00 $ (0.04 ) $ (0.04 ) $ (0.07 ) Fiscal 2015 Revenues $ 1,226,772 $ 1,318,551 $ 1,383,655 $ 1,444,608 $ 5,373,586 Gross profit 934,467 1,010,720 1,050,444 1,088,685 4,084,316 Loss from operations (55,341 ) (33,434 ) (22,042 ) (34,816 ) (145,633 ) Net loss $ (96,911 ) $ (61,088 ) $ (38,924 ) $ (65,765 ) $ (262,688 ) Basic net loss per share $ (0.16 ) $ (0.10 ) $ (0.06 ) $ (0.10 ) $ (0.42 ) Diluted net loss per share $ (0.16 ) $ (0.10 ) $ (0.06 ) $ (0.10 ) $ (0.42 )

Summary of Business and Signi38

Summary of Business and Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2013shares	Jan. 31, 2016customershares	Jan. 31, 2016USD ($)customersegmentcountrypurchase_periodshares	Jan. 31, 2015USD ($)customercountryshares	Jan. 31, 2014USD ($)customercountry	Mar. 20, 2013shares	Mar. 19, 2013shares
Concentration Risk [Line Items]
Common stock, shares authorized (in shares) | shares		1,600,000,000	1,600,000,000	1,600,000,000		1,600,000,000	400,000,000
Number of operating segments | segment			1
Impairment of long-lived assets | $			$ 0	$ 0	$ 0
Vesting period			4 years
Period of recognition			2 years
Offering period			12 months
Expected dividend yield			0.00%
Number of purchase periods | purchase_period			2
Advertising expense | $			$ 315,600,000	$ 203,600,000	$ 155,800,000
Percentage of tax benefit likely to be realized upon settlement (greater than 50%)			50.00%
Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Customers exceeding concentration of accounts receivable threshold, number | customer		0	0	0
Concentration risk percentage			5.00%	5.00%
Revenue | Customer Concentration Risk
Concentration Risk [Line Items]
Customers exceeding concentration of total revenue threshold, number | customer		0		0	0
Concentration risk percentage		5.00%		5.00%	5.00%
Revenue | Geographic Concentration Risk | Americas
Concentration Risk [Line Items]
Concentration risk percentage			95.00%	94.00%	96.00%
Revenue | Geographic Concentration Risk | All Other Countries
Concentration Risk [Line Items]
Countries exceeding concentration of total revenue threshold, number | country			0	0	0
Concentration risk percentage			10.00%	10.00%	10.00%
Assets | Geographic Concentration Risk | Outside Americas
Concentration Risk [Line Items]
Concentration risk percentage			11.00%	12.00%
Minimum
Concentration Risk [Line Items]
Deferred and amortized commission period			12 months
Maximum
Concentration Risk [Line Items]
Deferred and amortized commission period			36 months
Common Stock
Concentration Risk [Line Items]
Stock split conversion ratio	4
Number of additional shares for each share held (in shares) | shares	3

Summary of Business and Signi39

Summary of Business and Significant Accounting Policies - Revenues by Geographical Region (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 6,667,216	$ 5,373,586	$ 4,071,003
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,910,745	3,868,329	2,899,837
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,162,808	984,919	741,220
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 593,663	$ 520,338	$ 429,946

Summary of Business and Signi40

Summary of Business and Significant Accounting Policies - Schedule of Property and Equipment Estimated Useful Lives (Detail)	12 Months Ended
	Jan. 31, 2016
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	5 years
Building and structural components
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	32 years
Building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	10 years
Minimum | Computers, equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	3 years
Minimum | Capitalized internal-use software development costs
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	3 years
Maximum | Computers, equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	9 years
Maximum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	10 years
Maximum | Capitalized internal-use software development costs
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	5 years

Summary of Business and Signi41

Summary of Business and Significant Accounting Policies - Schedule of Assumptions Used to Calculate Fair Value of Options Granted (Detail) - $ / shares	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility, minimum	30.00%	32.00%	31.00%
Volatility, maximum	34.00%	35.00%	35.00%
Estimated life	9 months	9 months	9 months
Risk-free interest rate, minimum	0.06%	0.07%	0.07%
Risk-free interest rate, maximum	0.76%	0.23%	0.10%
Weighted-average fair value per share of grants (in dollars per share)	$ 19.49	$ 14.56	$ 10.30
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility		37.00%
Volatility, minimum	32.00%		37.00%
Volatility, maximum	37.00%		43.00%
Estimated life	3 years 6 months	3 years 7 months	3 years 4 months 10 days
Risk-free interest rate, minimum	1.09%	1.12%	0.48%
Risk-free interest rate, maximum	1.42%	1.53%	1.21%
Weighted-average fair value per share of grants (in dollars per share)	$ 20.22	$ 17.20	$ 14.08

Investments - Schedule of Marke

Investments - Schedule of Marketable Securities (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,568,139	$ 977,954
Unrealized Gains	2,480	5,182
Unrealized Losses	(3,605)	(969)
Fair Value	1,567,014	982,167
Corporate notes and obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	949,266	605,724
Unrealized Gains	1,398	3,031
Unrealized Losses	(2,983)	(481)
Fair Value	947,681	608,274
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	157,625	73,226
Unrealized Gains	375	257
Unrealized Losses	(56)	(1)
Fair Value	157,944	73,482
Mortgage backed obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	104,242	44,181
Unrealized Gains	106	159
Unrealized Losses	(323)	(415)
Fair Value	104,025	43,925
Asset backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	271,292	120,049
Unrealized Gains	186	131
Unrealized Losses	(226)	(43)
Fair Value	271,252	120,137
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	44,934	36,447
Unrealized Gains	209	115
Unrealized Losses	(6)	(25)
Fair Value	45,137	36,537
Foreign government obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,014	12,023
Unrealized Gains	42	278
Unrealized Losses	(5)	0
Fair Value	18,051	12,301
U.S. agency obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	16,076	19,488
Unrealized Gains	16	26
Unrealized Losses	(6)	(4)
Fair Value	16,086	19,510
Covered bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,690	66,816
Unrealized Gains	148	1,185
Unrealized Losses	0	0
Fair Value	$ 6,838	$ 68,001

Investments - Schedule of Short

Investments - Schedule of Short-Term and Long-Term Marketable Securities (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Short-term (due in one year or less)	$ 183,018	$ 87,312
Long-term (due after one year)	1,383,996	894,855
Fair Value of Marketable Securities	$ 1,567,014	$ 982,167

Investments - Schedule of Mar44

Investments - Schedule of Marketable Securities in Unrealized Loss Position (Detail) $ in Thousands	12 Months Ended
	Jan. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	$ 794,729
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(3,016)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	60,276
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	(589)
Marketable securities in an unrealized loss position, Fair Value	855,005
Marketable securities in an unrealized loss position, Unrealized Losses	(3,605)
Unrealized losses on fixed rate investments, upper range value	115
Corporate notes and obligations
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	531,258
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(2,472)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	48,047
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	(511)
Marketable securities in an unrealized loss position, Fair Value	579,305
Marketable securities in an unrealized loss position, Unrealized Losses	(2,983)
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	50,434
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(56)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	0
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	0
Marketable securities in an unrealized loss position, Fair Value	50,434
Marketable securities in an unrealized loss position, Unrealized Losses	(56)
Mortgage backed obligations
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	61,055
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(274)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	4,780
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	(49)
Marketable securities in an unrealized loss position, Fair Value	65,835
Marketable securities in an unrealized loss position, Unrealized Losses	(323)
Asset backed securities
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	135,917
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(199)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	5,490
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	(27)
Marketable securities in an unrealized loss position, Fair Value	141,407
Marketable securities in an unrealized loss position, Unrealized Losses	(226)
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	4,553
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(4)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	1,959
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	(2)
Marketable securities in an unrealized loss position, Fair Value	6,512
Marketable securities in an unrealized loss position, Unrealized Losses	(6)
U.S. agency obligations
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	5,989
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(6)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	0
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	0
Marketable securities in an unrealized loss position, Fair Value	5,989
Marketable securities in an unrealized loss position, Unrealized Losses	(6)
Foreign government obligations
Schedule of Available-for-sale Securities [Line Items]
Marketable securities in an unrealized loss position for less than 12 months, Fair Value	5,523
Marketable securities in an unrealized loss position for less than 12 months, Unrealized Losses	(5)
Marketable securities in an unrealized loss position for more than 12 months, Fair Value	0
Marketable securities in an unrealized loss position for more than 12 months, Unrealized Losses	0
Marketable securities in an unrealized loss position, Fair Value	5,523
Marketable securities in an unrealized loss position, Unrealized Losses	$ (5)

Investments - Strategic Investm

Investments - Strategic Investments (Detail) $ in Thousands	12 Months Ended
	Jan. 31, 2016USD ($)investment	Jan. 31, 2015USD ($)investment
Strategic Investments [Roll Forward]
Balance at beginning of year	$ 175,774
Balance at end of year	$ 520,721	$ 175,774
Strategic Investments
Investment Holdings [Line Items]
Number of investments in marketable equity securities | investment	6	4
Marketable equity securities, unrealized gains	$ 8,500	$ 13,100
Non-marketable debt and equity securities	504,500	158,000
Non-marketable debt and equity securities, unrealized gains	209,600	122,000
Strategic Investments [Roll Forward]
Balance at beginning of year	175,774	92,489
Additions	386,219	101,774
Sales, dispositions and fair market value adjustments	(41,272)	(18,489)
Balance at end of year	520,721	175,774
Equity Securities [Member] | Strategic Investments
Investment Holdings [Line Items]
Marketable equity securities, fair value	16,200	17,800
Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Cost Approach Valuation Technique [Member] | Strategic Investments
Investment Holdings [Line Items]
Non-marketable debt and equity securities fair value	$ 714,100	$ 280,000

Investments - Schedule of Asset

Investments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 532,600	$ 601,600
Recurring measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities		68,001
Total Assets	2,197,479	1,299,248
Total Liabilities	14,025	5,694
Recurring measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities		0
Total Assets	216,107	13,983
Total Liabilities	0	0
Recurring measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities		68,001
Total Assets	1,981,372	1,285,265
Total Liabilities	14,025	5,694
Recurring measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities		0
Total Assets	0	0
Total Liabilities	0	0
Recurring measurement | Prepaid expenses and other current assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	4,731	10,611
Recurring measurement | Prepaid expenses and other current assets | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	0	0
Recurring measurement | Prepaid expenses and other current assets | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	4,731	10,611
Recurring measurement | Prepaid expenses and other current assets | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	0	0
Recurring measurement | Accounts payable, accrued expenses and other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	14,025	5,694
Recurring measurement | Accounts payable, accrued expenses and other liabilities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	0	0
Recurring measurement | Accounts payable, accrued expenses and other liabilities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	14,025	5,694
Recurring measurement | Accounts payable, accrued expenses and other liabilities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency derivative contracts	0	0
Recurring measurement | Time deposits | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	236,798	292,487
Recurring measurement | Time deposits | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Recurring measurement | Time deposits | Cash and cash equivalents | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	236,798	292,487
Recurring measurement | Time deposits | Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Recurring measurement | Money market mutual funds | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	216,107	13,983
Recurring measurement | Money market mutual funds | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	216,107	13,983
Recurring measurement | Money market mutual funds | Cash and cash equivalents | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Recurring measurement | Money market mutual funds | Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Recurring measurement | Commercial Paper | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	159,230
Recurring measurement | Commercial Paper | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Recurring measurement | Commercial Paper | Cash and cash equivalents | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	159,230
Recurring measurement | Commercial Paper | Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Recurring measurement | Agency and sovereign paper | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	13,599
Recurring measurement | Agency and sovereign paper | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Recurring measurement | Agency and sovereign paper | Cash and cash equivalents | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	13,599
Recurring measurement | Agency and sovereign paper | Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Recurring measurement | Corporate notes and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	947,681	608,274
Recurring measurement | Corporate notes and obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Corporate notes and obligations | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	947,681	608,274
Recurring measurement | Corporate notes and obligations | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	157,944	73,482
Recurring measurement | U.S. treasury securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | U.S. treasury securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	157,944	73,482
Recurring measurement | U.S. treasury securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Mortgage backed obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	104,025	43,925
Recurring measurement | Mortgage backed obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Mortgage backed obligations | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	104,025	43,925
Recurring measurement | Mortgage backed obligations | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Asset backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	271,252	120,137
Recurring measurement | Asset backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Asset backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	271,252	120,137
Recurring measurement | Asset backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	45,137	36,537
Recurring measurement | Municipal securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Municipal securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	45,137	36,537
Recurring measurement | Municipal securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	18,051	12,301
Recurring measurement | Foreign government obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | Foreign government obligations | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	18,051	12,301
Recurring measurement | Foreign government obligations | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | U.S. agency obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	16,086	19,510
Recurring measurement | U.S. agency obligations | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Recurring measurement | U.S. agency obligations | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	16,086	19,510
Recurring measurement | U.S. agency obligations | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	$ 0
Recurring measurement | Covered bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	6,838
Recurring measurement | Covered bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0
Recurring measurement | Covered bonds | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	6,838
Recurring measurement | Covered bonds | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 0

Investments - Schedule of Outst

Investments - Schedule of Outstanding Foreign Currency Derivative Contracts Related Primarily to Intercompany Receivables and Payables (Detail) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Derivative [Line Items]
Fair value of foreign currency derivative contracts	$ (9,294)	$ 4,917
Foreign currency derivative contracts
Derivative [Line Items]
Notional amount of foreign currency derivative contracts	$ 1,274,515	$ 942,086

Investments - Fair Value of Out

Investments - Fair Value of Outstanding Derivative Instruments (Detail) - Derivatives not designated as hedging instruments - Foreign currency derivative contracts - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 4,731	$ 10,611
Accounts payable, accrued expenses and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 14,025	$ 5,694

Investments - Effect of Derivat

Investments - Effect of Derivative Instruments Not Designated as Hedging Instruments on Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Derivatives not designated as hedging instruments | Foreign currency derivative contracts | Other income (expense)
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) on Derivative Instruments Recognized in Income	$ (25,786)	$ (1,186)	$ 108

Investments - Schedule of Compo

Investments - Schedule of Components of Investment Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Interest income	$ 14,146	$ 10,129	$ 9,512
Realized gains	3,287	517	5,952
Realized losses	(2,092)	(608)	(5,246)
Total investment income	$ 15,341	$ 10,038	$ 10,218

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,635,665	$ 1,745,693
Less accumulated depreciation and amortization	(919,837)	(619,827)
Property and equipment, net	1,715,828	1,125,866
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	183,888	0
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	614,081	125,289
Computers, equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,281,766	1,171,762
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	82,242	71,881
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 473,688	$ 376,761

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) ft² in Thousands, $ in Thousands	1 Months Ended				3 Months Ended	12 Months Ended
	Oct. 31, 2015USD ($)a	Sep. 30, 2014USD ($)a	Aug. 31, 2014USD ($)a	Apr. 30, 2014USD ($)	Oct. 31, 2015USD ($)a	Jan. 31, 2016USD ($)	Jan. 31, 2015USD ($)	Jan. 31, 2014USD ($)	Dec. 31, 2013ft²
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense						$ 302,000	$ 246,600	$ 185,900
Fixed assets acquired under capital lease agreements						747,100	734,700
Area of land | a		1.5	3.7
Proceeds from sale of property held for sale		$ 125,000	$ 72,500
Gain on sales of land and building improvements		$ 7,800	$ 7,800
Net rentable area (in square feet) | ft²									445
Proceeds from land and building improvements held for sale						127,066	223,240	0
Gain on sales of land and building improvements						21,792	15,625	$ 0
Financing obligation, building in progress-leased facility						196,711	125,289
Property and equipment, gross						2,635,665	1,745,693
Financing obligation, building in progress-leased facility, current						15,402	0
Contractual obligation amount							334,000
Undeveloped Real Estate
Property, Plant and Equipment [Line Items]
Area of land | a	8.8				8.8
Undeveloped Real Estate and Portion of Perpetual Parking Rights
Property, Plant and Equipment [Line Items]
Proceeds from land and building improvements held for sale	$ 127,100				$ 157,100
Proceeds from deposit from disposition of property plant and equipment				$ 30,000
Gain on sales of land and building improvements	$ 21,800
Computers, equipment and software
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization						310,300	206,700
Property and equipment, gross						1,281,766	1,171,762
Building in progress, leased facility
Property, Plant and Equipment [Line Items]
Property and equipment, gross						174,600
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross						$ 614,081	$ 125,289

Business Combinations (Narrativ

Business Combinations (Narrative) (Details) ft² in Thousands	Aug. 14, 2014USD ($)	Feb. 28, 2015USD ($)ft²story	Oct. 31, 2015USD ($)ft²	Jan. 31, 2016USD ($)	Jan. 31, 2015USD ($)	Jan. 31, 2014USD ($)	Dec. 31, 2013ft²
Business Acquisition [Line Items]
Net rentable area (in square feet) | ft²							445
Business combinations, net of cash acquired				$ 58,680,000	$ (38,071,000)	$ 2,617,302,000
Goodwill impairment				$ 0	0	$ 0
50 Fremont Street [Member]
Business Acquisition [Line Items]
Number of stories in building | story		41
Net rentable area (in square feet) | ft²		817
Area of lease (in square feet) | ft²		500	567
Other consideration		$ 115,000,000
Gain recognized on purchase		36,600,000
Reversal of tenant incentives		46,100,000
Land		9,483,000
Consideration transferred		637,600,000
Intangible assets		$ 7,590,000
RelateIQ, Inc. [Member]
Business Acquisition [Line Items]
Consideration transferred	$ 340,206,000
Share conversion ratio	0.12
Equity interest issued or issuable	$ 33,900,000
Fair value of stock options and restricted stock awards assumed	1,050,000
Allocated to future services	32,800,000
Intangible assets	$ 16,200,000
Goodwill acquired					$ 289,857,000
Other Business Combination [Member]
Business Acquisition [Line Items]
Business combinations, net of cash acquired			$ 60,100,000
Goodwill acquired			$ 68,700,000

Business Combinations (Consider

Business Combinations (Consideration Transferred) (Details) - USD ($) $ in Thousands	Aug. 14, 2014	Feb. 28, 2015
50 Fremont Street [Member]
Business Acquisition [Line Items]
Cash		$ 435,189
Loan assumed on 50 Fremont		200,000
Prorations due to ownership transfer midmonth		2,411
Consideration transferred		$ 637,600
RelateIQ, Inc. [Member]
Business Acquisition [Line Items]
Cash	$ 1,123
Fair value of equity awards assumed	338,033
Fair value of stock options and restricted stock awards assumed	1,050
Consideration transferred	$ 340,206
RelateIQ, Inc. [Member] | Common Stock
Business Acquisition [Line Items]
Shares issued	6,320,735

Business Combinations (Estimate

Business Combinations (Estimated Fair Values of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Feb. 28, 2015	Jan. 31, 2015	Aug. 14, 2014	Jan. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 3,849,937		$ 3,782,660		$ 3,500,823
50 Fremont Street [Member]
Business Acquisition [Line Items]
Intangible assets		$ 7,590
Net assets acquired		$ 637,600
RelateIQ, Inc. [Member]
Business Acquisition [Line Items]
Cash				$ 39,194
Intangible assets				16,200
Goodwill				289,857
Current and noncurrent liabilities				(4,700)
Deferred tax liability				(345)
Net assets acquired				$ 340,206

Business Combinations (Intangib

Business Combinations (Intangible Assets Acquired) (Details) - USD ($) $ in Thousands	Aug. 14, 2014	Feb. 28, 2015
50 Fremont Street [Member]
Business Acquisition [Line Items]
Building		$ 435,390
Land		183,888
Land		9,483
Intangible assets		7,590
Loan assumed on 50 Fremont fair market value adjustment		1,249
Net assets acquired		$ 637,600
RelateIQ, Inc. [Member]
Business Acquisition [Line Items]
Fair Value	$ 16,200
Intangible assets	16,200
Net assets acquired	340,206
RelateIQ, Inc. [Member] | Developed Technology [Member]
Business Acquisition [Line Items]
Fair Value	$ 14,470
Useful Life	7 years
RelateIQ, Inc. [Member] | Customer Relationship and Other [Member]
Business Acquisition [Line Items]
Fair Value	$ 1,730
RelateIQ, Inc. [Member] | Customer Relationship and Other [Member] | Minimum
Business Acquisition [Line Items]
Useful Life	1 year
RelateIQ, Inc. [Member] | Customer Relationship and Other [Member] | Maximum
Business Acquisition [Line Items]
Useful Life	3 years

Business Combinations (Goodwill

Business Combinations (Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Goodwill [Roll Forward]
Goodwill beginning balance	$ 3,782,660	$ 3,500,823
Finalization of acquisition date fair values	(1,378)	(8,020)
Goodwill ending balance	3,849,937	3,782,660
RelateIQ, Inc. [Member]
Goodwill [Roll Forward]
Goodwill acquired		$ 289,857
Other Acquisitions [Member]
Goodwill [Roll Forward]
Goodwill acquired	$ 68,655

Business Combinations (Expected

Business Combinations (Expected Future Amortization Expense for Purchased Intangible Assets) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Business Combinations [Abstract]
Fiscal 2,017	$ 131,491
Fiscal 2,018	118,762
Fiscal 2,019	101,425
Fiscal 2,020	73,268
Fiscal 2,021	45,859
Thereafter	19,201
Net Book Value	$ 490,006	$ 632,192

Business Combinations (Intang59

Business Combinations (Intangible Assets Acquired From Business Combinations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 1,154,088	$ 1,135,098
Accumulated Amortization	(664,082)	(502,906)
Net Book Value	$ 490,006	$ 632,192
Weighted Average Remaining Useful Life	4 years 3 months 18 days	5 years
Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 684,260	$ 674,160
Accumulated Amortization	(451,889)	(371,997)
Net Book Value	$ 232,371	$ 302,163
Weighted Average Remaining Useful Life	3 years 4 months 24 days	4 years 3 months 15 days
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 410,763	$ 409,603
Accumulated Amortization	(160,866)	(107,245)
Net Book Value	$ 249,897	$ 302,358
Weighted Average Remaining Useful Life	5 years 2 months 12 days	6 years 1 month 2 days
Trade Names And Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 38,980	$ 38,980
Accumulated Amortization	(38,980)	(17,142)
Net Book Value	$ 0	$ 21,838
Weighted Average Remaining Useful Life	0 years	1 year
Territory Rights and Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 12,372	$ 12,355
Accumulated Amortization	(8,585)	(6,522)
Net Book Value	$ 3,787	$ 5,833
Weighted Average Remaining Useful Life	2 years 7 months 6 days	3 years 1 month 10 days
Fremont 50 Lease Intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 7,713
Accumulated Amortization	(3,762)
Net Book Value	$ 3,951
Weighted Average Remaining Useful Life	2 years 3 months 18 days

Debt - Summary of Convertible S

Debt - Summary of Convertible Senior Notes (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 29, 2016	Jan. 31, 2015	Mar. 31, 2013
Debt Conversion [Line Items]
Convertible 0.25% senior notes, net	$ 1,095,059		$ 1,070,692
Convertible Debt | 0.25% Convertible Senior Notes due April 1, 2018
Debt Conversion [Line Items]
Par Value Outstanding	1,150,000
Equity Component Recorded at Issuance	122,421
Convertible 0.25% senior notes, net	$ 1,095,059		$ 1,070,692
Contractual interest rate	0.25%	0.25%		0.25%

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	Jan. 29, 2016	Oct. 06, 2014	Jul. 11, 2013	Jul. 11, 2013	Mar. 31, 2015	Feb. 28, 2015	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Oct. 31, 2015	Mar. 31, 2013
Debt Instrument [Line Items]
Interest Expense, Debt							$ 40,488,000	$ 51,421,000	$ 61,607,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 650,000,000
Repayments of debt		$ 262,500,000
Interest rate							1.60%
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee percentage		0.125%
Revolving Credit Facility | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.00%
Revolving Credit Facility | Minimum | Adjusted LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee percentage		0.25%
Revolving Credit Facility | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Revolving Credit Facility | Maximum | Adjusted LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Convertible Debt | 0.25% Warrants
Debt Instrument [Line Items]
Contractual interest rate											0.25%
Convertible Debt | 0.25% Convertible Senior Notes due April 1, 2018
Debt Instrument [Line Items]
Par value											$ 1,150,000,000
Contractual interest rate	0.25%						0.25%				0.25%
Consecutive trading days threshold							20 days
Consecutive trading days threshold, total							30 days
Stock price trigger							130.00%
Notes price trigger							98.00%
Purchase price upon fundamental change							100.00%
Estimated fair value of Company's senior notes							$ 1,400,000,000
Fair value debt basis amount							100
Closing prices of Company's common stock	$ 68.06
If-converted value in excess of principal	$ 28,000,000
Line of Credit
Debt Instrument [Line Items]
Repayments of debt					$ 300,000,000
Long-term Line of Credit										$ 0
Line of Credit | Term Loan
Debt Instrument [Line Items]
Proceeds from issuance debt				$ 300,000,000
Line of Credit | Term Loan | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.50%
Line of Credit | Term Loan | Minimum | Adjusted LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Line of Credit | Term Loan | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%
Line of Credit | Term Loan | Maximum | Adjusted LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			2.00%
50 Fremont Street [Member]
Debt Instrument [Line Items]
Loan assumed on 50 Fremont						$ 200,000,000
50 Fremont Street [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Contractual interest rate						3.75%
Loan assumed on 50 Fremont						$ 200,000,000
Interest Expense, Debt							$ 7,300,000

Debt - Schedule of Conversion o

Debt - Schedule of Conversion of Senior Notes to Common Stock (Detail) - Convertible Debt - 0.25% Convertible Senior Notes due April 1, 2018	12 Months Ended
	Jan. 31, 2016$ / shares
Debt Instrument [Line Items]
Conversion Rate per $1,000 Par Value	0.0150512
Initial Conversion Price per Share	$ 66.44

Debt - Schedule of Convertible

Debt - Schedule of Convertible Senior Notes (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 29, 2016	Jan. 31, 2015	Mar. 31, 2013
Convertible Senior Notes
Debt Instrument [Line Items]
Net carrying amount	$ 1,095,059		$ 1,070,692
Convertible Debt | 0.25% Convertible Senior Notes due April 1, 2018
Debt Instrument [Line Items]
Principal	1,150,000		1,150,000
Less: debt discount, net	$ (54,941)		$ (79,308)
Interest percentage of convertible senior notes	0.25%	0.25%		0.25%
Effective interest rates of Senior Notes	2.53%

Debt - Summary of Hedge Notes (

Debt - Summary of Hedge Notes (Detail) - Convertible Debt - 0.25% Note Hedges $ in Thousands	12 Months Ended
	Jan. 31, 2016USD ($)shares
Derivatives, Fair Value [Line Items]
Purchase | $	$ 153,800
Shares | shares	17,308,880

Debt - Components of Warrants (

Debt - Components of Warrants (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Mar. 31, 2013
Class of Warrant or Right [Line Items]
Proceeds	$ 0	$ 0	$ 84,800
Warrants (in shares)	17,308,880
Convertible Debt | 0.25% Warrants
Class of Warrant or Right [Line Items]
Proceeds	$ 84,800
Warrants (in shares)	17,308,880
Strike Price (in dollars per share)	$ 90.40
Contractual interest rate				0.25%

Debt - Schedule of Interest Exp

Debt - Schedule of Interest Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Debt Disclosure [Abstract]
Contractual interest expense	$ 11,879	$ 10,224	$ 10,195
Amortization of debt issuance costs	4,105	4,622	4,470
Amortization of debt discount	24,504	36,575	46,942
Debt Instrument, Interest Expense, Total	$ 40,488	$ 51,421	$ 61,607

Other Balance Sheet Accounts -

Other Balance Sheet Accounts - Schedule of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid income taxes	$ 22,044	$ 21,514
Customer contract asset	1,423	16,620
Other taxes receivable	27,341	27,540
Prepaid expenses and other current assets	199,786	179,352
Prepaid expenses and other current assets	$ 250,594	$ 245,026

Other Balance Sheet Accounts 68

Other Balance Sheet Accounts - Schedule of Capitalized Software Costs (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Capitalized software costs	$ 384,258	$ 433,398
Capitalized internal-use software development costs, net of accumulated amortization of $186,251 and $136,314, respectively
Property, Plant and Equipment [Line Items]
Capitalized software costs	123,065	96,617
Accumulated amortization	186,251	136,314
Acquired developed technology, net of accumulated amortization of $481,118 and $392,736, respectively
Property, Plant and Equipment [Line Items]
Capitalized software costs	261,193	336,781
Accumulated amortization	$ 481,118	$ 392,736

Other Balance Sheet Accounts 69

Other Balance Sheet Accounts - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Value-added tax and sales tax receivables	$ 27.3	$ 27.5
Purchased intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	81.3	64.6	$ 37.6
Acquired intellectual property
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	6.7	5	4.2
Capitalized internal-use software development costs
Finite-Lived Intangible Assets [Line Items]
Capitalized software amortization expense	49.9	35.7	29.2
Capitalized stock based compensation	6.1	5.3	3.5
Acquired developed technology
Finite-Lived Intangible Assets [Line Items]
Capitalized software amortization expense	$ 88.4	$ 98.4	$ 114.7

Other Balance Sheet Accounts 70

Other Balance Sheet Accounts - Schedule of Other Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Deferred income taxes, noncurrent, net	$ 15,986	$ 16,948
Long-term deposits	19,469	19,715
Acquired intangible assets	490,006	632,192
Customer contract asset	93	1,447
Other	74,069	76,259
Other assets, net	378,762	460,219
Accumulated amortization	664,082	502,906
Purchased intangible assets, net of accumulated amortization of $212,248 and $130,968, respectively
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	258,580	329,971
Accumulated amortization	212,248	130,968
Acquired intellectual property, net of accumulated amortization of $22,439 and $15,695, respectively
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	10,565	15,879
Accumulated amortization	$ 22,439	$ 15,695

Other Balance Sheet Accounts 71

Other Balance Sheet Accounts - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Payables and Accruals [Abstract]
Accounts payable	$ 71,481	$ 95,537
Accrued compensation	554,502	457,102
Accrued other liabilities	447,729	321,032
Accrued income and other taxes payable	205,781	184,844
Accrued professional costs	33,814	16,889
Customer liability, current (1)	6,558	13,084
Accrued rent	14,071	14,847
Financing obligation, building in progress-leased facility, current	15,402	0
Accrued expenses and other current liabilities	$ 1,349,338	$ 1,103,335

Other Balance Sheet Accounts 72

Other Balance Sheet Accounts - Schedule of Other Non current Liabilities (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Payables and Accruals [Abstract]
Deferred income taxes and income taxes payable	$ 85,996	$ 66,541
Customer liability, noncurrent	66	1,026
Financing obligation, building in progress-leased facility	196,711	125,289
Long-term lease liabilities and other	550,292	701,612
Other noncurrent liabilities	$ 833,065	$ 894,468

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Jan. 31, 2006	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jul. 03, 2013	Jul. 10, 2014	Jul. 09, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)		46,879,908	30,789,538		30,789,538
ESPP purchase amount (in shares)		3,000,000	3,300,000
Shares issued under employee stock plans		$ 154,960	$ 127,820	$ 92,485
Total intrinsic value of the options exercised during the period		$ 291,300	$ 250,300	$ 292,300
Weighted-average remaining contractual life of vested and expected to vest options (in years)		4 years 9 months
Options vested		9,763,563
Weighted average exercise price vested		$ 41.99
Weighted-average contractual life of vested and expected to vest options (in years)		3 years 3 months 18 days
Aggregate intrinsic value		$ 254,557,559
Weighted-average exercise price		$ 0.001
Restricted stock units, vesting period (in years)		4 years
Weighted-average grant date fair value of the restricted stock units issued		$ 58.89	$ 46.99	$ 73.61
Preferred stock, shares authorized (in shares)		5,000,000	5,000,000		5,000,000
Preferred stock, outstanding (in shares)		0	0		0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life of stock options (in years)	10 years				7 years	5 years
Aggregate intrinsic value		$ 254,600
2014 Inducement Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (in shares)							335,000
Shares available for grant (in shares)		646,548
2006 Inducement Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)								319,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)		6,844,796
Amount withheld on behalf of employees for future purchases		$ 37,500
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)		46,233,360
Shares of common stock received under the plan (in shares)		83,127	108,800	67,041
Expense related to awards at the time of issuance		$ 5,000	$ 4,500	$ 4,800
Additional Paid-in Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under employee stock plans		$ 154,957	$ 127,816	$ 92,482

Stockholders' Equity - Stock Ac

Stockholders' Equity - Stock Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2016USD ($)$ / sharesshares
Shares available for grant
Shares Available for Grant, Balance	30,789,538
Shares Available for Grant, Options granted under all plans	(7,119,327)
Shares Available for Grant, Exercised	0
Shares Available for Grant, Expired	(1,791,011)
Shares Available for Grant, Cancelled	2,129,903
Shares Available for Grant, Balance	46,879,908
Outstanding Stock Options
Outstanding Stock Options, Balance	29,458,361
Outstanding Stock Options	7,119,327
Outstanding Stock Options, Exercised	(8,188,987)
Outstanding Stock Options, Plan shares expired	0
Outstanding Stock Options, Cancelled	(2,129,903)
Outstanding Stock Options, Balance	26,258,798
Outstanding Stock Options, Vested or expected to vest	23,956,184
Outstanding Stock Options, Exercisable	9,763,563
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Balance | $ / shares	$ 44.36
Weighted- Average Exercise Price, Options | $ / shares	78.85
Weighted- Average Exercise Price, Exercised | $ / shares	35.53
Weighted- Average Exercise Price, Cancelled | $ / shares	46.87
Weighted- Average Exercise Price, Expired | $ / shares	0
Weighted- Average Exercise Price, Balance | $ / shares	56.26
Weighted- Average Exercise Price, Vested or expected to vest | $ / shares	54.97
Weighted- Average Exercise Price, Exercisable | $ / shares	$ 41.99
Aggregate Intrinsic Value
Weighted- Average Exercise Price, Balance | $	$ 386,893,769
Weighted- Average Exercise Price, Vested or expected to vest | $	375,375,548
Weighted- Average Exercise Price, Exercisable | $	$ 254,557,559
Restricted stock activity
Shares available for grant
Shares Available for Grant, Restricted stock activity	(15,905,661)
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options | $ / shares	$ 0
Performance restricted stock units
Shares available for grant
Shares Available for Grant, Restricted stock activity	(411,471)
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options | $ / shares	$ 0
Stock grants to board and advisory board members
Shares available for grant
Shares Available for Grant, Stock grants to board and advisory board members	(192,298)
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options | $ / shares	$ 0
2013 Equity Incentive Plan
Shares available for grant
Shares Available for Grant, Increase in shares authorized	39,148,364
Shares Available for Grant, Balance	46,233,360
Outstanding Stock Options
Outstanding Stock Options, Increase in shares authorized	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options | $ / shares	$ 0
2014 Inducement Equity Incentive Plan
Shares available for grant
Shares Available for Grant, Increase in shares authorized	231,871
Shares Available for Grant, Balance	646,548
Outstanding Stock Options
Outstanding Stock Options, Increase in shares authorized	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options | $ / shares	$ 0

Stockholders' Equity - Stock Op

Stockholders' Equity - Stock Options Outstanding (Detail)	12 Months Ended
	Jan. 31, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Number Outstanding | shares	26,258,798
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	4 years 10 months 24 days
Weighted- Average Exercise Price, Options Outstanding	$ 56.26
Options Exercisable, Number of Shares | shares	9,763,563
Options Exercisable, Weighted- Average Exercise Price	$ 41.99
$0.86 to $37.95
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	0.86
Range of Exercise Prices, Maximum	$ 37.95
Options, Number Outstanding | shares	4,555,639
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	2 years
Weighted- Average Exercise Price, Options Outstanding	$ 29.18
Options Exercisable, Number of Shares | shares	3,838,627
Options Exercisable, Weighted- Average Exercise Price	$ 28.42
$38.03 to $52.14
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	38.03
Range of Exercise Prices, Maximum	$ 52.14
Options, Number Outstanding | shares	2,556,681
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	2 years 3 months 18 days
Weighted- Average Exercise Price, Options Outstanding	$ 39.94
Options Exercisable, Number of Shares | shares	1,826,462
Options Exercisable, Weighted- Average Exercise Price	$ 39.62
52.30
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	52.30
Range of Exercise Prices, Maximum	$ 52.30
Options, Number Outstanding | shares	3,800,524
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	4 years 9 months 18 days
Weighted- Average Exercise Price, Options Outstanding	$ 52.30
Options Exercisable, Number of Shares | shares	1,852,072
Options Exercisable, Weighted- Average Exercise Price	$ 52.30
$53.60 to $57.79
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	53.60
Range of Exercise Prices, Maximum	$ 57.79
Options, Number Outstanding | shares	1,466,601
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	5 years 4 months 24 days
Weighted- Average Exercise Price, Options Outstanding	$ 55.29
Options Exercisable, Number of Shares | shares	459,196
Options Exercisable, Weighted- Average Exercise Price	$ 55.31
59.34
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	59.34
Range of Exercise Prices, Maximum	$ 59.34
Options, Number Outstanding | shares	6,313,261
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	5 years 9 months 18 days
Weighted- Average Exercise Price, Options Outstanding	$ 59.34
Options Exercisable, Number of Shares | shares	1,739,344
Options Exercisable, Weighted- Average Exercise Price	$ 59.34
$59.37 to $77.86
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	59.37
Range of Exercise Prices, Maximum	$ 77.86
Options, Number Outstanding | shares	1,925,609
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	6 years 2 months 12 days
Weighted- Average Exercise Price, Options Outstanding	$ 68.04
Options Exercisable, Number of Shares | shares	47,862
Options Exercisable, Weighted- Average Exercise Price	$ 63.07
$ 80.99
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Minimum	80.99
Range of Exercise Prices, Maximum	$ 80.99
Options, Number Outstanding | shares	5,640,483
Weighted- Average Remaining Contractual Life (Years), Options Outstanding	6 years 9 months 18 days
Weighted- Average Exercise Price, Options Outstanding	$ 80.99
Options Exercisable, Number of Shares | shares	0
Options Exercisable, Weighted- Average Exercise Price	$ 0

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Restricted Stock Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Restricted Stock Outstanding
Ending Balance	21,294,585
Restricted Stock Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Restricted Stock Outstanding, Balance	$ 0.001
Restricted stock activity
Restricted Stock Outstanding
Beginning Balance	23,144,008	24,653,578
Granted, Outstanding	9,736,623	11,170,913
Cancelled, Outstanding	(2,715,332)	(3,174,976)
Vested and converted to shares, Outstanding	(9,062,096)	(9,505,507)
Ending Balance	21,294,585	23,144,008
Expected to vest, Outstanding	17,846,945
Restricted Stock Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Restricted Stock Outstanding, Balance	$ 0.001	$ 0.001
Weighted- Average Exercise Price, Restricted Stock Outstanding, Granted	0.001	0.001
Weighted- Average Exercise Price, Restricted Stock Outstanding, Cancelled	0.001	0.001
Weighted- Average Exercise Price, Restricted Stock Outstanding, Vested and converted to shares	0.001	0.001
Weighted- Average Exercise Price, Restricted Stock Outstanding, Balance	$ 0.001	$ 0.001
Restricted Stock Outstanding Aggregate Intrinsic Value
Aggregate Intrinsic Value, Ending Balance	$ 1,449,309,455
Aggregate Intrinsic Value, Expected to vest	$ 1,214,663,077
Performance restricted stock units
Restricted Stock Outstanding
Granted, Outstanding	191,382
Restricted Stock Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Restricted Stock Outstanding, Granted	$ 0.001

Stockholders' Equity - Shares o

Stockholders' Equity - Shares of Common Stock Available for Future Issuance under Stock Option Plans (Detail) - shares	Jan. 31, 2016	Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding	26,258,798	29,458,361
Restricted stock awards and units and performance stock units outstanding	21,294,585
Stock available for future grant	46,879,908	30,789,538
Convertible senior notes	17,308,880
Warrants (in shares)	17,308,880
Total shares available for future grant	135,895,847
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock available for future grant	46,233,360
2014 Inducement Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock available for future grant	646,548
2004 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock available for future grant	6,844,796

Income Taxes - Domestic And For

Income Taxes - Domestic And Foreign Components of Income (Loss) Before Provision (Benefit) For Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Income Tax Disclosure [Abstract]
Domestic	$ (49,558)	$ (211,253)	$ (326,392)
Foreign	113,837	(1,832)	(31,543)
Income (loss) before benefit from (provision for) income taxes	$ 64,279	$ (213,085)	$ (357,935)

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Taxes Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Current:
Federal	$ 40,723	$ 893	$ (10,431)
State	13,023	1,388	(245)
Foreign	57,347	50,493	39,784
Total	111,093	52,774	29,108
Deferred:
Federal	1,453	8,771	(128,798)
State	(426)	(10,830)	(22,012)
Foreign	(415)	(1,112)	(4,058)
Total	612	(3,171)	(154,868)
Provision for (benefit from) income taxes	$ 111,705	$ 49,603	$ (125,760)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 31, 2015	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Income Tax Disclosure [Abstract]
Net tax benefits related to exercises of stock options and vesting of restricted stocks		$ 59,500	$ 7,700	$ 8,100
Discrete tax benefit recorded from partial release of company's valuation allowance			143,100
Operating Loss Carryforwards [Line Items]
Benefit from (provision for) income taxes		(111,705)	(49,603)	125,760
Increase (decrease) in valuation allowance		146,900
Excess tax benefits included in net operating loss carryforwards but are not reflected in deferred tax assets		623,200	527,200
Income tax benefit recognized from stock compensation expense		$ 180,200	170,800	147,800
Percentage of tax benefit recognized (greater than 50%)		50.00%
Unrecognized tax benefits		$ 172,741	146,188	102,275	$ 75,144
Unrecognized tax benefits which would affect the effective tax rate		56,200	44,600	34,900
Accrued interest and penalties related to unrecognized tax benefits		1,300	1,300	600
Non-current income tax related to penalties and interest		6,300	4,600	3,300
Decrease in unrecognized tax benefits from settlements with taxing authorities		8,684	$ 0	$ 0
Reasonably possible decrease of unrecognized tax benefits		15,000
General Business Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		700
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		2,300,000
Domestic Tax Authority | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		146,300
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		26,800
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		1,100,000
Tax credit carryforward		11,100
California | State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		845,000
California | State and Local Jurisdiction | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		124,200
California | State and Local Jurisdiction | Enterprise Zone Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		9,500
Employee Stock awards
Operating Loss Carryforwards [Line Items]
Benefit from (provision for) income taxes	$ 30,400	$ 18,900

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Statutory Federal Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Income Tax Disclosure [Abstract]
U.S. federal taxes at statutory rate	$ 22,498	$ (74,580)	$ (125,277)
State, net of the federal benefit	(5,260)	(5,332)	(10,780)
Foreign taxes in excess of the U.S. statutory rate	(25,780)	29,880	33,412
Change in valuation allowance	139,565	100,143	(25,048)
Tax credits	(48,943)	(28,056)	(22,293)
Non-deductible expenses	26,841	26,224	21,407
Tax expense/(benefit) from acquisitions	1,584	2,341	1,811
Other, net	1,200	(1,017)	1,008
Provision for (benefit from) income taxes	$ (111,705)	$ (49,603)	$ 125,760

Income Taxes - Significant Comp

Income Taxes - Significant Components of Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Deferred tax assets:
Net operating loss carryforwards	$ 260,015	$ 252,858
Deferred stock-based expense	89,532	96,753
Tax credits	211,997	152,715
Deferred rent expense	49,790	58,849
Accrued liabilities	122,950	92,506
Deferred revenue	14,261	15,664
Basis difference on strategic and other investments	26,202	24,637
Financing obligation	127,198	84,095
Deferred cost sharing adjustment	30,351	0
Other	22,845	20,017
Total deferred tax assets	955,141	798,094
Less valuation allowance	(439,971)	(293,097)
Deferred tax assets, net of valuation allowance	515,170	504,997
Deferred tax liabilities:
Deferred commissions	(121,071)	(107,197)
Purchased intangibles	(160,200)	(213,920)
Unrealized gains on investments	(2,858)	(1,793)
Depreciation and amortization	(224,435)	(171,908)
Other	(2,207)	(3,157)
Total deferred tax liabilities	(510,771)	(497,975)
Net deferred tax assets	$ 4,399	$ 7,022

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance as of February 1,	$ 146,188	$ 102,275	$ 75,144
Tax positions taken in prior period:
Gross increases	7,456	17,938	8,420
Gross decreases	(7,264)	(1,967)	(4,466)
Tax positions taken in current period:
Gross increases	38,978	34,226	27,952
Settlements	(8,684)	0	0
Lapse of statute of limitations	(781)	(1,224)	(5,205)
Currency translation effect	(3,152)	(5,060)	430
Balance as of January 31,	$ 172,741	$ 146,188	$ 102,275

Earnings_Loss Per Share - Recon

Earnings/Loss Per Share - Reconciliation of Denominator Used in Calculation of Basic and Diluted Loss Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Earnings Per Share [Abstract]
Net loss	$ (25,509)	$ (25,157)	$ (852)	$ 4,092	$ (65,765)	$ (38,924)	$ (61,088)	$ (96,911)	$ (47,426)	$ (262,688)	$ (232,175)
Weighted-average shares outstanding for basic loss per share (in shares)									661,647	624,148	597,613
Convertible senior notes (in shares)									0	0	0
Employee stock awards (in shares)									0	0	0
Warrants (in shares)									0	0	0
Adjusted weighted-average shares outstanding and assumed conversions for diluted loss per share (in shares)									661,647	624,148	597,613

Earnings_Loss Per Share - Share

Earnings/Loss Per Share - Shares Excluded from Diluted Earnings or Loss Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Employee Stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded	26,615	22,157	19,664
Convertible Senior Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded	17,309	25,953	43,965
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded	17,309	37,517	44,253

Commitments - Additional Inform

Commitments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Other Commitments [Line Items]
Financing obligation, building in progress-leased facility	$ 196,711	$ 125,289
Total operating lease commitment balance	2,300,000
Rent expense	174,600	$ 162,800	$ 123,600
Facilities Space [Member]
Other Commitments [Line Items]
Total operating lease commitment balance	2,000,000
Letter of Credit
Other Commitments [Line Items]
Value of outstanding letters of credit	$ 81,900

Commitments - Schedule of Futur

Commitments - Schedule of Future Minimum Lease Payments under Non-Cancelable Operating and Capital Leases (Detail) $ in Thousands	Jan. 31, 2016USD ($)
Capital Leases
Fiscal 2,017	$ 118,820
Fiscal 2,018	122,467
Fiscal 2,019	115,581
Fiscal 2,020	201,543
Fiscal 2,021	0
Thereafter	0
Total minimum lease payments	558,411
Less: amount representing interest	(60,207)
Present value of capital lease obligations	498,204
Operating Leases
Fiscal 2,017	356,527
Fiscal 2,018	319,878
Fiscal 2,019	251,649
Fiscal 2,019	202,514
Fiscal 2,020	189,430
Thereafter	998,849
Total minimum lease payments	2,318,847
Financing Obligation, Building in Progress-Leased Facility
Fiscal 2,017	16,877
Fiscal 2,018	21,107
Fiscal 2,019	21,551
Fiscal 2,020	21,995
Fiscal 2,021	22,440
Thereafter	230,077
Total minimum lease payments	$ 334,047

Employee Benefit Plan (Details)

Employee Benefit Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Company contributions	$ 45.6	$ 38.1	$ 27.9

Related-Party Transactions (Det

Related-Party Transactions (Details) - Affiliated Entity [Member] $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2015USD ($)board_memberboard_seatemployee	Jan. 31, 2015USD ($)
Related Party Transaction [Line Items]
Number of Company's Board Members that Hold Board Seats in Foundation	1
Number of Board Seats in Foundation	3
Number of Company's Employees that Hold Board Seats in Non-Profit | employee	1
Number Company's Board Members that Hold Board Seats in Non-Profit | board_member	1
Number of Board Seats in Non-Profit Held by Company's Employees and Chairman	3
Number of Board Seats in Non-Profit	9
Value of resources donated to related parties | $	$ 1.2
Value of donated subscriptions to related parties | $		$ 69.9

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	1 Months Ended
	Feb. 29, 2016	Jan. 31, 2015
Subsequent Event [Line Items]
Contractual obligation amount		$ 334
Subsequent Event [Member] | Portion of Office Building in New York, NY [Member]
Subsequent Event [Line Items]
Contractual obligation amount	$ 311
Lease term	12 years
Subsequent Event [Member] | SteelBrick, Inc. [Member]
Subsequent Event [Line Items]
Percentage of acquired platform delivered natively on Salesforce platform	100.00%
Consideration transferred	$ 300

Selected Quarterly Financial 91

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 1,809,398	$ 1,711,967	$ 1,634,684	$ 1,511,167	$ 1,444,608	$ 1,383,655	$ 1,318,551	$ 1,226,772	$ 6,667,216	$ 5,373,586
Gross profit	1,365,719	1,288,284	1,229,300	1,129,365	1,088,685	1,050,444	1,010,720	934,467	5,012,668	4,084,316	$ 3,102,575
Income (Loss) from operations	20,560	43,434	19,824	31,105	(34,816)	(22,042)	(33,434)	(55,341)	114,923	(145,633)	(286,074)
Net income (loss)	$ (25,509)	$ (25,157)	$ (852)	$ 4,092	$ (65,765)	$ (38,924)	$ (61,088)	$ (96,911)	$ (47,426)	$ (262,688)	$ (232,175)
Basic net income (loss) per share (in dollars per share)	$ (0.04)	$ (0.04)	$ 0	$ 0.01	$ (0.10)	$ (0.06)	$ (0.10)	$ (0.16)	$ (0.07)	$ (0.42)	$ (0.39)
Diluted net income (loss) per share (in dollars per share)	$ (0.04)	$ (0.04)	$ 0	$ 0.01	$ (0.10)	$ (0.06)	$ (0.10)	$ (0.16)	$ (0.07)	$ (0.42)	$ (0.39)

Schedule II Valuation and Qua92

Schedule II Valuation and Qualifying Accounts (Details) - Allowance for doubtful accounts - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 8,146,000	$ 4,769,000	$ 1,853,000
Additions	14,738,000	6,867,000	7,963,000
Deductions write-offs	(12,396,000)	(3,490,000)	(5,047,000)
Balance at end of year	$ 10,488,000	$ 8,146,000	$ 4,769,000