Snap (SNAP) 10-Q 26 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 19, 2018
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	SNAP
Entity Registrant Name	Snap Inc
Entity Central Index Key	1,564,408
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		979,789,725
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		93,638,578
Class C Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		221,490,713

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net loss	$ (325,148)	$ (443,159)	$ (1,064,243)	$ (3,095,089)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	24,898	17,467	68,966	42,502
Stock-based compensation	126,809	221,702	416,439	2,458,851
Deferred income taxes	(124)	(12,632)	129	(14,397)
Excess inventory reserve and related asset impairment	0	21,997	0	21,997
Lease exit charges	29,340	0	33,268	0
Other	8,608	(2,042)	(679)	(3,714)
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net of allowance	(18,834)	(16,304)	15,937	(24,513)
Prepaid expenses and other current assets	(435)	(1,130)	(3,059)	(48,965)
Other assets	7,089	1,563	20,314	(8,545)
Accounts payable	2,084	(5,214)	(44,638)	4,103
Accrued expenses and other current liabilities	14,841	21,259	(14,664)	103,449
Other liabilities	(1,671)	2,480	8,360	5,737
Net cash used in operating activities	(132,543)	(194,013)	(563,870)	(558,584)
Cash flows from investing activities
Purchases of property and equipment	(26,285)	(25,948)	(97,501)	(63,306)
Purchases of intangible assets	0	(305)	(2,565)	(8,025)
Non-marketable investments	(250)	0	(21,260)	(7,530)
Cash paid for acquisitions, net of cash acquired	0	(128,231)	0	(352,407)
Purchases of marketable securities	(444,369)	(670,406)	(1,318,467)	(3,412,776)
Sales of marketable securities	0	203,994	45,007	441,089
Maturities of marketable securities	560,465	783,848	1,926,802	1,831,327
Net cash provided by (used in) investing activities	89,561	162,952	532,016	(1,571,628)
Cash flows from financing activities
Proceeds from the exercise of stock options	142	6,072	47,865	6,855
Stock repurchases from employees for tax withholdings	0	(158,827)	(551)	(367,234)
Proceeds from issuance of Class A common stock in initial public offering, net of underwriting commissions	0	0	0	2,657,797
Payments of initial public offering issuance costs	0	(307)	0	(9,672)
Net cash provided by (used in) financing activities	142	(153,062)	47,314	2,287,746
Change in cash, cash equivalents, and restricted cash	(42,840)	(184,123)	15,460	157,534
Cash, cash equivalents, and restricted cash, beginning of period	395,307	504,993	337,007	163,336
Cash, cash equivalents, and restricted cash, end of period	352,467	320,870	352,467	320,870
Supplemental disclosures
Cash paid for income taxes	758	(53)	3,155	5,437
Supplemental disclosures of non-cash activities
Assumed equity awards in acquisitions	0	3,911	0	3,911
Purchase consideration liabilities related to acquisitions	0	530	0	11,772
Construction in progress related to financing lease obligations	436	424	1,292	1,107
Net change in accounts payable and accrued expenses and other current liabilities related to property and equipment additions	$ (6,278)	$ (412)	$ (5,690)	$ (4,155)

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenue	$ 297,695	$ 207,937	$ 790,624	$ 539,256
Costs and expenses:
Cost of revenue	197,554	210,710	585,917	526,216
Research and development	203,510	239,442	607,742	1,301,025
Sales and marketing	97,552	101,511	301,350	412,147
General and administrative	122,450	118,101	369,358	1,424,480
Total costs and expenses	621,066	669,764	1,864,367	3,663,868
Operating loss	(323,371)	(461,827)	(1,073,743)	(3,124,612)
Interest income	7,011	6,253	19,715	15,026
Interest expense	(919)	(887)	(2,783)	(2,580)
Other income (expense), net	(7,625)	1,002	(4,533)	1,975
Loss before income taxes	(324,904)	(455,459)	(1,061,344)	(3,110,191)
Income tax benefit (expense)	(244)	12,300	(2,899)	15,102
Net loss	$ (325,148)	$ (443,159)	$ (1,064,243)	$ (3,095,089)
Net loss per share attributable to Class A, Class B, and Class C common stockholders (Note 3):
Basic	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Diluted	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Weighted average shares used in computation of net loss per share:
Basic	1,309,918	1,232,993	1,277,293	1,140,004
Diluted	1,309,918	1,232,993	1,277,293	1,140,004

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (325,148)	$ (443,159)	$ (1,064,243)	$ (3,095,089)
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities, net of tax	71	485	564	(411)
Foreign currency translation	(1,808)	7,607	(8,251)	14,150
Total other comprehensive income (loss), net of tax	(1,737)	8,092	(7,687)	13,739
Total comprehensive income (loss)	$ (326,885)	$ (435,067)	$ (1,071,930)	$ (3,081,350)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 350,398	$ 334,063
Marketable securities	1,064,009	1,708,976
Accounts receivable, net of allowance	261,833	279,473
Prepaid expenses and other current assets	48,887	44,282
Total current assets	1,725,127	2,366,794
Property and equipment, net	216,609	166,762
Intangible assets, net	136,473	166,473
Goodwill	634,186	639,882
Other assets	71,381	81,655
Total assets	2,783,776	3,421,566
Current liabilities
Accounts payable	20,175	71,194
Accrued expenses and other current liabilities	265,345	275,062
Total current liabilities	285,520	346,256
Other liabilities	114,164	82,983
Total liabilities	399,684	429,239
Commitments and contingencies (Note 6)
Stockholders’ equity
Additional paid-in capital	8,098,519	7,634,825
Accumulated other comprehensive income (loss)	6,470	14,157
Accumulated deficit	(5,720,910)	(4,656,667)
Total stockholders’ equity	2,384,092	2,992,327
Total liabilities and stockholders’ equity	2,783,776	3,421,566
Class A Non-voting Common Stock
Stockholders’ equity
Common stock, value	10	9
Class B Voting Common Stock
Stockholders’ equity
Common stock, value	1	1
Class C Voting Common Stock
Stockholders’ equity
Common stock, value	$ 2	$ 2

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Class A Non-voting Common Stock
Common stock par value	$ 0.00001	$ 0.00001
Common stock authorized	3,000,000,000	3,000,000,000
Common stock issued	976,066,000	883,022,000
Common stock outstanding	976,066,000	883,022,000
Class B Voting Common Stock
Common stock par value	$ 0.00001	$ 0.00001
Common stock authorized	700,000,000	700,000,000
Common stock issued	93,660,000	122,564,000
Common stock outstanding	93,660,000	122,564,000
Class C Voting Common Stock
Common stock par value	$ 0.00001	$ 0.00001
Common stock authorized	260,888,000	260,888,000
Common stock issued	221,491,000	216,616,000
Common stock outstanding	221,491,000	216,616,000

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Snap Inc. is a camera company. Snap Inc. (“we,” “our,” or “us”) was formed as Future Freshman, LLC, a California limited liability company, in 2010. We changed our name to Toyopa Group, LLC in 2011, incorporated as Snapchat, Inc., a Delaware corporation, in 2012, and changed our name to Snap Inc. in 2016. Snap Inc. is headquartered in Santa Monica, California. Our flagship product, Snapchat, is a camera application that was created to help people communicate through short videos and images called “Snaps.” Basis of Presentation The accompanying unaudited consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Our consolidated financial statements include the accounts of Snap Inc. and our wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Our fiscal year ends on December 31. These unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017, as filed with the SEC on February 22, 2018 (the “Annual Report”). In our opinion, the unaudited interim consolidated financial statements include all adjustments of a normal recurring nature necessary for the fair presentation of our financial position, results of operations, and cash flows. The results of operations for the three and nine months ended September 30, 2018 are not necessarily indicative of the results to be expected for the year ending December 31, 2018. Other than described below, there have been no changes to our significant accounting policies described in our Annual Report that have had a material impact on our consolidated financial statements and related notes. Use of Estimates The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements. Management’s estimates are based on historical information available as of the date of the consolidated financial statements and various other assumptions that we believe are reasonable under the circumstances. Actual results could differ from those estimates. Key estimates relate primarily to determining the fair value of assets and liabilities assumed in business combinations, evaluation of contingencies, uncertain tax positions, excess inventory reserves, lease exit charges, and the fair value of stock-based awards. On an ongoing basis, management evaluates our estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. Recent Accounting Pronouncements In January 2017, the Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) Leases (Topic 842): Targeted Improvements In January 2016, the FASB issued ASU 2016-01, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). Revenue Recognition, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). In June 2018, the FASB issued ASU 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting In August 2018, the FASB issued ASU 2018-15, Intangibles — Goodwill and Other — Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

Revenue

Revenue	9 Months Ended
	Sep. 30, 2018
Revenue From Contract With Customer [Abstract]
Revenue	2. Revenue Revenue is recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to receive in exchange for those goods or services. We determine collectability by performing ongoing credit evaluations and monitoring customer accounts receivable balances. Sales tax is excluded from reported revenue. We generate substantially all of our revenues by offering various advertising products on Snapchat, including Snap Ads, Sponsored Creative Tools, and measurement services, referred to as advertising revenue. Sponsored Creative Tools include Sponsored Geofilters and Sponsored Lenses. Sponsored Geofilters allow users to interact with an advertiser’s brand by enabling stylized brand artwork to be overlaid on a Snap. Sponsored Lenses allow users to interact with an advertiser’s brand by enabling branded interactive experiences. The substantial majority of advertising revenue is generated from the display of advertisements on Snapchat through contractual agreements that are either on a fixed fee basis over a period of time or based on the number of advertising impressions delivered. Revenue related to agreements based on the number of impressions delivered is recognized when the advertisement is displayed. Revenue related to fixed fee arrangements is recognized ratably over the service period, typically less than 30 days in duration, and such arrangements do not contain minimum impression guarantees. In determining whether an arrangement exists, we ensure that an agreement, such as an insertion order, has been fully executed. We sell advertising directly to advertisers (“Snap-sold” revenue) and certain partners that provide content on Snapchat (“content partners”) also sell directly to advertisers (“partner-sold” revenue). Snap Ads may be subject to revenue sharing agreements between us and our content partners. Our Sponsored Creative Tools and measurement services are only Snap-sold and are not subject to revenue sharing arrangements. Snap-sold revenue is recognized based on the gross amount that we charge the advertiser. Partner-sold revenue is recognized based on the net amount of revenue to be received from the content partners. We recognize Snap-sold revenue on a gross basis predominately because we are the primary obligor responsible for fulfilling advertisement delivery, including the acceptability of the services delivered. For Snap-sold advertising, we enter into contractual arrangements directly with advertisers. We are directly responsible for the fulfillment of the contractual terms and any remedy for issues with such fulfillment. For Snap-sold revenue, we also have latitude in establishing the selling price with the advertiser, as we sell advertisements at a rate determined at our sole discretion. We recognize partner-sold revenue on a net basis predominately because the content partner, and not Snap, is the primary obligor responsible for fulfillment, including the acceptability of the services delivered. In partner-sold advertising arrangements, the content partner has a direct contractual relationship with the advertiser. There is no contractual relationship between us and the advertiser for partner-sold transactions. When a content partner sells advertisements, the content partner is responsible for fulfilling the advertisements, and accordingly, we have determined the content partner is the primary obligor. Additionally, we do not have any latitude in establishing the price with the advertiser for partner-sold advertising. The content partner may sell advertisements at a rate determined at its sole discretion. For the periods presented, partner-sold revenue was not material. We also generate revenue from sales of our hardware product, Spectacles. For the periods presented, revenue from the sales of Spectacles was not material. The following table represents our revenue disaggregated by geography based on the billing address of the advertising customer: Three Months Ended September 30, Nine Months Ended September 30, 2017 2018 2017 2018 (in thousands) Revenue: North America (1) (2) $ 169,102 $ 196,320 $ 457,849 $ 534,878 Europe (3) 27,788 49,033 56,824 120,364 Rest of world 11,047 52,342 24,583 135,382 Total revenue $ 207,937 $ 297,695 $ 539,256 $ 790,624 (1) North America includes Mexico and the Caribbean. (2) United States revenue was $188.5 million and $162.8 million for the three months ended September 30, 2018 and 2017, respectively, and $515.4 million and $432.2 million for the nine months ended September 30, 2018 and 2017, respectively. (3) Europe includes Russia and Turkey.

Net Loss per Share

Net Loss per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Net Loss per Share	3. Net Loss per Share We compute net loss per share using the two-class method required for multiple classes of common stock and participating securities. Our participating securities include any shares issued on the early exercise of stock options subject to repurchase because holders of such shares have non-forfeitable dividend rights in the event a dividend is paid on common stock. In March 2017, we completed our initial public offering (“IPO”) in which we issued and sold 160.3 million shares of Class A common stock, inclusive of the over-allotment, at an initial public offering price of $17.00 per share and excluding shares sold in the IPO by certain of our existing stockholders. We received net proceeds of $2.6 billion after deducting underwriting discounts and commissions of $68.1 million and other offering expenses of $14.7 million. On the closing of the IPO, all shares of our then-outstanding convertible preferred stock other than Series FP preferred stock automatically converted into an aggregate of 246.8 million shares of Class B common stock and all outstanding shares of Series FP preferred stock automatically converted into 215.9 million shares of Class C common stock. Following the IPO, we have three classes of authorized common stock – Class A common stock, Class B common stock, and Class C common stock. Before the IPO, our participating securities also included Series D, E, F, and FP preferred stock and Series A, A-1, B, and C convertible preferred stock. The rights, including the liquidation and dividend rights, of the Class A common stock and Class B common stock, and the Series D, E, F, and FP preferred stock were substantially identical, other than voting rights. Accordingly, the Class A common stock, Class B common stock, and the Series D, E, F, and FP preferred stock shared equally in our net losses. The holders of early exercised shares subject to repurchase and the holders of Series A, A-1, B, and C convertible preferred stock did not have a contractual obligation to share in our losses, and as a result our net losses were not allocated to these participating securities. In connection with our IPO, our Series D, E, and F preferred stock converted on a one-to-one basis into Class B common stock, and our Series FP preferred stock converted on a one-to-one basis into Class C common stock. The liquidation and dividend rights of the aforementioned preferred series are substantially identical to the rights of the common classes into which they converted. Accordingly, we have presented the Series D, E, and F preferred stock outstanding before the IPO together with the Class B common stock, and the Series FP preferred stock outstanding before the IPO together with the Class C common stock for purposes of calculating net loss per share. The prior period presentation has been adjusted to conform to our current period presentation. Also in connection with our IPO, our Series A, A-1, B, and C preferred stock converted on a one-to-one basis into Class B common stock. The shares of Class B common stock that resulted from the conversion of the Series A, A-1, B, and C preferred stock are weighted in the denominator of net loss per share for Class B common stock for the portion of the time outstanding subsequent to our IPO. Basic net loss per share is computed by dividing net loss attributable to each class of stockholders by the weighted-average number of shares of such class of stock outstanding during the period. Vested restricted stock units (“RSUs”) that have not been settled, including the vested equity award granted to our CEO (“CEO award”), have been included in the appropriate common share class used to calculate basic net loss per share. For the calculation of diluted net loss per share, net loss per share attributable to common stockholders for basic net loss per share is adjusted by the effect of dilutive securities, including awards under our equity compensation plans. Diluted net loss per share attributable to common stockholders is computed by dividing the resulting net loss attributable to common stockholders by the weighted-average number of fully diluted common shares outstanding. For the three and nine months ended September 30, 2017 and 2018, our potentially dilutive shares relating to stock options, RSUs, and common stock subject to repurchase, and, for the prior year period, shares of Series A, A-1, B, and C convertible preferred stock were not included in the computation of diluted net loss per share as the effect of including these shares in the calculation would have been anti-dilutive. The numerators and denominators of the basic and diluted net loss per share computations for our common stock are calculated as follows for the three and nine months ended September 30, 2017 and 2018: Three Months Ended September 30, Nine Months Ended September 30, 2017 2018 2017 2018 (in thousands, except per share data) Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Numerator: Net loss $ (289,818 ) $ (62,288 ) $ (91,053 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (1,869,782 ) $ (561,713 ) $ (663,594 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Net loss attributable to common stockholders $ (289,818 ) $ (62,288 ) $ (91,053 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (1,869,782 ) $ (561,713 ) $ (663,594 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Denominator: Basic shares: Weighted-average common shares - Basic 806,353 173,304 253,336 968,090 94,364 247,464 688,690 206,894 244,420 932,767 95,598 248,928 Diluted shares: Weighted-average common shares - Diluted 806,353 173,304 253,336 968,090 94,364 247,464 688,690 206,894 244,420 932,767 95,598 248,928 Net loss per share attributable to common stockholders: Basic $ (0.36 ) $ (0.36 ) $ (0.36 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (2.71 ) $ (2.71 ) $ (2.71 ) $ (0.83 ) $ (0.83 ) $ (0.83 ) Diluted $ (0.36 ) $ (0.36 ) $ (0.36 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (2.71 ) $ (2.71 ) $ (2.71 ) $ (0.83 ) $ (0.83 ) $ (0.83 ) The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented: Three and Nine Months Ended September 30, 2017 2018 (in thousands) Stock options 31,106 16,999 Unvested RSUs 169,719 141,179

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stockholders' Equity	4. Stockholders’ Equity We maintain three share-based employee compensation plans: the 2017 Equity Incentive Plan (“2017 Plan”), the 2014 Equity Incentive Plan (“2014 Plan”), and the 2012 Equity Incentive Plan (“2012 Plan”, and collectively with the 2017 Plan and the 2014 Plan, the “Stock Plans”). In January 2017, our board of directors adopted the 2017 Plan, and in February 2017 our stockholders approved the 2017 Plan, effective on March 1, 2017, which serves as the successor to the 2014 Plan and 2012 Plan and provides for the grant of incentive stock options to employees, including employees of any parent or subsidiary, and for the grant of nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance stock awards, performance cash awards, and other forms of stock awards to employees, directors, and consultants, including employees and consultants of our affiliates. The following table summarizes the restricted stock activity during the nine months ended September 30, 2018: Class A Outstanding Restricted Stock Class B Outstanding Restricted Stock Weighted- Average Grant Date Fair Value per Restricted Stock (in thousands, except per share data) Unvested at December 31, 2017 156,005 7,791 $ 15.89 Granted 55,035 — $ 14.19 Vested (37,651 ) (5,218 ) $ 15.66 Forfeited (33,817 ) (966 ) $ 16.28 Unvested at September 30, 2018 139,572 1,607 $ 15.20 RSUs granted to employees before January 1, 2017 (“Pre-2017 RSUs”) included both service-based and performance conditions to vest in the underlying common stock. The performance condition related to these awards was satisfied on the effectiveness of the registration statement for our IPO, which occurred in March 2017. Total unrecognized compensation cost related to Pre-2017 RSUs was $269.2 million as of September 30, 2018 and is expected to be recognized over a weighted-average period of 1.9 years. All RSUs granted after December 31, 2016 vest on the satisfaction of only a service-based condition (“Post-2017 RSUs”). Total unrecognized compensation cost related to Post-2017 RSUs was $1.1 billion as of September 30, 2018 and is expected to be recognized over a weighted-average period of 3.2 years. The service condition for RSUs granted prior to February 2018 is generally satisfied over four years, 10% after the first year of service, 20% over the second year, 30% over the third year, and 40% over the fourth year. In limited instances, we have issued Post-2017 RSUs with vesting periods in excess of four years. The service condition for RSUs granted after February 2018 is generally satisfied in equal monthly installments over four years. Additionally, we have 26.6 million and 34.4 million RSUs that are vested but have not yet settled as of September 30, 2018 and December 31, 2017, respectively. These RSUs are primarily related to the CEO award. The following table summarizes the stock option award activity under the Stock Plans during the nine months ended September 30, 2018: Class A Number of Shares Class B Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (1) (in thousands, except per share data) Outstanding at December 31, 2017 20,807 11,790 $ 4.10 4.99 $ 343,110 Granted 4,687 — $ 14.00 — $ — Exercised (10,393 ) (8,319 ) $ 2.56 — $ — Forfeited (1,402 ) (171 ) $ 15.21 — $ — Outstanding at September 30, 2018 13,699 3,300 $ 7.73 6.53 $ 60,036 (1) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the closing market price of our Class A common stock as of December 31, 2017 and September 30, 2018, respectively. Total unrecognized compensation cost related to stock options granted and assumed was $47.5 million as of September 30, 2018 Stock-Based Compensation Expense by Function Total stock-based compensation expense by function was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2018 2017 2018 (in thousands) Cost of revenue $ 1,951 $ 1,368 $ 23,882 $ 3,111 Research and development 143,303 95,329 1,025,231 265,447 Sales and marketing 27,254 25,082 207,538 63,264 General and administrative 49,194 5,030 1,202,200 84,617 Total $ 221,702 $ 126,809 $ 2,458,851 $ 416,439

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	5. Goodwill and Intangible Assets The changes in the carrying amount of goodwill for the nine months ended September 30, 2018 were as follows: Goodwill (in thousands) Balance as of December 31, 2017 $ 639,882 Foreign currency translation (5,696 ) Balance as of September 30, 2018 $ 634,186 Intangible assets consisted of the following: September 30, 2018 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands except years) Domain names 1.7 $ 5,414 $ 4,013 $ 1,401 Trademarks 1.7 5,772 3,732 2,040 Acquired developed technology 4.0 179,849 70,450 109,399 Customer relationships 2.2 15,572 7,098 8,474 Patents 7.1 19,710 4,551 15,159 $ 226,317 $ 89,844 $ 136,473 December 31, 2017 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands except years) Domain names 2.1 $ 5,418 $ 3,210 $ 2,208 Trademarks 2.3 5,772 2,701 3,071 Acquired developed technology 4.7 180,396 45,435 134,961 Customer relationships 2.6 15,558 3,506 12,052 Patents 7.8 17,150 2,969 14,181 $ 224,294 $ 57,821 $ 166,473 Amortization of intangible assets was $10.6 million and $9.7 million for the three months ended September 30, 2018 and 2017, respectively, and $32.2 million and $20.8 million for the nine months ended September 30, 2018 and 2017, respectively. As of September 30, 2018, the estimated intangible asset amortization expense for the next five years and thereafter is as follows: Estimated Amortization (in thousands) Remainder of 2018 $ 10,459 2019 38,687 2020 32,216 2021 25,154 2022 15,423 Thereafter 14,534 Total $ 136,473

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	6. Commitments and Contingencies Commitments Leases We entered into various non-cancelable lease agreements for certain of our offices with original lease periods expiring between 2018 and 2027. Certain of the arrangements have free rent periods or escalating rent payment provisions. We recognize rent expense under such arrangements on a straight-line basis. Our future minimum lease payments required under these non-cancelable operating lease obligations as of September 30, 2018, are as follows: Operating Leases (in thousands) Remainder of 2018 $ 14,524 2019 60,877 2020 57,331 2021 54,672 2022 46,775 Thereafter 144,732 Total minimum lease payments $ 378,911 Operating lease expenses for the three months ended September 30, 2018 and 2017 were $15.1 million and $13.5 million, respectively, and $46.4 million and $38.2 million for the nine months ended September 30, 2018 and 2017, respectively. We have and will continue to exit various operating leases prior to the end of the contractual lease term, primarily as a result of moving to a centralized corporate office located in Santa Monica, California. As of September 30, 2018, these leases have a remaining contractual obligation of approximately $69.5 million. In the three and nine months ended September 30, 2018, we recorded lease exit charges of $29.3 million and $33.3 million, respectively. The charges, recorded as general and administrative expense, primarily include the present value of our remaining lease obligation on the cease use dates that occurred during the quarter, net of estimated sublease income. Based on current exit plans and management’s assumptions, we have incurred the substantial majority of total lease exit charges expected. We have several lease agreements where we are deemed the owner under build-to-suit lease accounting. The fair value of the leased property and corresponding financing obligations are included in property and equipment, net and other liabilities, respectively, on our consolidated balance sheets as of September 30, 2018. Our future minimum lease payments required under non-cancelable financing lease obligations, which exclusively relate to our build-to-suit leases, as of September 30, 2018, are as follows: Financing Leases (in thousands) Remainder of 2018 $ 1,187 2019 4,796 2020 4,947 2021 5,092 2022 5,167 Thereafter 20,785 Total minimum lease payments $ 41,974 We recognize an increase in the fair value of the asset as additional building costs are incurred during the construction period and a corresponding increase in the lease financing obligation for any construction costs to be reimbursed by the landlord. As of September 30, 2018, $16.6 million of lease financing obligations are included in other liabilities on our consolidated balance sheets. Contractual Commitments We have non-cancelable contractual agreements related to the hosting of our data storage processing, storage, and other computing services. In January 2017, we entered into the Google Cloud Platform License Agreement, which was amended in September 2017, December 2017, and January 2018. Under the agreement, we were granted a license to access and use certain cloud services. The agreement has an initial term of five years and we are required to purchase at least $400.0 million of cloud services in each year of the agreement. For each of the first four years, up to 15% of this amount may be moved to a subsequent year. If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference. In March 2016, we entered into the AWS Enterprise Agreement for the use of cloud services from Amazon Web Services, Inc. (“AWS”) which was amended in March 2016 and February 2017. The agreement will continue indefinitely until terminated by either party. Under the February 2017 addendum, we committed to spend $1.0 billion on AWS services between January 2017 and December 2021. That addendum was amended in October 2018, and we are now committed to spend an aggregate of $1.1 billion between January 2017 and December 2022 on AWS services ($90.0 million in 2018, $150.0 million in 2019, $215.0 million in 2020, $280.0 million in 2021, and $349.0 million in 2022). If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference. Any such payment may be applied to future use of AWS services during the addendum term, although it will not count towards meeting the future minimum purchase commitments under the addendum. The future minimum contractual commitments including commitments less than one year, as of September 30, 2018, inclusive of the changes related to the AWS October 2018 addendum, for each of the next five years are as follows: Minimum Commitment (in thousands) Remainder of 2018 $ 117,832 2019 555,167 2020 625,917 2021 686,785 2022 382,333 Thereafter — Total minimum commitments $ 2,368,034 Contingencies We record a loss contingency when it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. We also disclose material contingencies when we believe a loss is not probable but reasonably possible. Accounting for contingencies requires us to use judgment related to both the likelihood of a loss and the estimate of the amount or range of loss. Many legal and tax contingencies can take years to be resolved. Pending Matters Beginning in May 2017, we, certain of our officers and directors, and the underwriters for our IPO were named as defendants in securities class actions purportedly brought on behalf of purchasers of our Class A common stock, alleging violation of securities laws in connection with our IPO. Management believes these lawsuits are without merit and intend to vigorously defend them. Based on the preliminary nature of the proceedings in this case, the outcome of this matter remains uncertain. On April 3, 2018, BlackBerry Limited filed a lawsuit against us alleging that we infringe six of its patents. We are currently investigating BlackBerry’s allegations, and management believes we have meritorious defenses. Based on the preliminary nature of the proceedings, the outcome of this matter remains uncertain. In 2017, Vaporstream, Inc. filed a lawsuit against us alleging that we infringe a number of its patents. We filed a motion to dismiss, which the court denied without prejudice to re-file after further factual development. Later in 2017, we filed a motion for summary judgment. On February 27, 2018, the court issued an order denying our motion for summary judgment. On June 13, 2018, the court stayed the lawsuit pending the outcome of several challenges to the validity of the patents, filed by us at the U.S. Patent Office. While management believes we have meritorious defenses to Vaporstream’s claims, the outcome of this matter remains uncertain. The outcomes of our legal proceedings are inherently unpredictable, subject to significant uncertainties, and could be material to our financial condition, results of operations, and cash flows for a particular period. For the pending matters described above, it is not possible to estimate the reasonably possible loss or range of loss. We are subject to various other legal proceedings and claims in the ordinary course of business, including certain patent, trademark, privacy, and employment matters. Although occasional adverse decisions or settlements may occur, we do not believe that the final disposition of any of our other pending matters will seriously harm our business, financial condition, results of operations, and cash flows. Indemnifications In the ordinary course of business, we may provide indemnifications of varying scope and terms to customers, vendors, lessors, investors, directors, officers, employees, and other parties with respect to certain matters. Indemnification may include losses from our breach of such agreements, services we provide, or third party intellectual property infringement claims. These indemnifications may survive termination of the underlying agreement and the maximum potential amount of future indemnification payments may not be subject to a cap. We have not incurred material costs to defend lawsuits or settle claims related to these indemnifications as of September 30, 2018. We believe the fair value of these liabilities is immaterial and accordingly have no liabilities recorded for these agreements at September 30, 2018.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	7. Fair Value Measurements We classify our marketable securities within Level 1 because we use quoted market prices to determine their fair value. The following table sets forth our financial assets as of December 31, 2017 and September 30, 2018 that are measured at fair value on a recurring basis during the period: Fair Value December 31, 2017 September 30, 2018 (in thousands) Cash and cash equivalents Cash $ 267,715 $ 325,302 U.S. government securities 25,861 12,473 U.S. government agency securities 40,487 12,623 Total cash and cash equivalents $ 334,063 $ 350,398 Marketable securities U.S. government securities $ 1,350,581 $ 909,005 U.S. government agency securities 358,395 155,004 Total marketable securities $ 1,708,976 $ 1,064,009 The amortized cost of U.S. government securities with maturities less than one year was $909.4 million and $1.4 billion as of September 30, 2018 and December 31, 2017, respectively. The amortized cost of U.S. government agency securities with maturities of less than one year was $155.0 million and $358.6 million as of September 30, 2018 and December 31, 2017, respectively.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes Our tax provision for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items arising in that quarter. Our effective tax rate differs from the U.S. statutory tax rate primarily due to valuation allowances on our deferred tax assets as it is more likely than not that some or all of our deferred tax assets will not be realized. Income tax expense was $0.2 million and $2.9 million for the three and nine months ended September 30, 2018, respectively, compared to a tax benefit of $12.3 million and $15.1 million for the three and nine months ended September 30, 2017, respectively. The income tax benefit for the three and nine months ended September 30, 2017 was primarily from the partial release of a valuation allowance against our net deferred tax assets that was not in the three and nine months ended September 30, 2018. The valuation allowance release was the result of net deferred tax liabilities originating from acquisitions that were an available source of income to realize a portion of our deferred tax assets. The Tax Cuts and Jobs Act introduced the global intangible low-taxed income (“GILTI”) provisions that impose a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. We recognize the tax on GILTI as an expense in the period the tax is incurred. We have not provided deferred taxes related to temporary differences that on their reversal will affect the amount of income subject to GILTI in the period.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2018
Accumulated Other Comprehensive Income Loss [Abstract]
Accumulated Other Comprehensive Income (Loss)	9. Accumulated Other Comprehensive Income (Loss) The table below presents the changes in accumulated other comprehensive income (loss) (“AOCI”) by component and the reclassifications out of AOCI: Changes in Accumulated Other Comprehensive Income (Loss) by Component Marketable Securities Foreign Currency Translation Total (in thousands) Balance at December 31, 2017 $ (1,078 ) $ 15,235 $ 14,157 OCI before reclassifications (1) 564 (8,251 ) (7,687 ) Amounts reclassified from AOCI (2) — — — Net current period OCI 564 (8,251 ) (7,687 ) Balance at September 30, 2018 $ (514 ) $ 6,984 $ 6,470 (1) Net of tax expense of $0.1 million for gains / losses on marketable securities. (2) Realized gains and losses on marketable securities are reclassified from AOCI into other income (expense), net in the consolidated statements of operations.

Property and Equipment, Net

Property and Equipment, Net	9 Months Ended
	Sep. 30, 2018
Property Plant And Equipment [Abstract]
Property and Equipment, Net	10. Property and Equipment, Net The following table lists property and equipment, net by geographic area: As of December 31, 2017 As of September 30, 2018 (in thousands) Property and equipment, net: United States $ 146,862 $ 193,752 Rest of world (1) 19,900 22,857 Total property and equipment, net $ 166,762 $ 216,609 (1) No individual country exceeded 10% of our total property and equipment, net for any period presented.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Our consolidated financial statements include the accounts of Snap Inc. and our wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Our fiscal year ends on December 31. These unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017, as filed with the SEC on February 22, 2018 (the “Annual Report”). In our opinion, the unaudited interim consolidated financial statements include all adjustments of a normal recurring nature necessary for the fair presentation of our financial position, results of operations, and cash flows. The results of operations for the three and nine months ended September 30, 2018 are not necessarily indicative of the results to be expected for the year ending December 31, 2018. Other than described below, there have been no changes to our significant accounting policies described in our Annual Report that have had a material impact on our consolidated financial statements and related notes.
Use of Estimates	Use of Estimates The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements. Management’s estimates are based on historical information available as of the date of the consolidated financial statements and various other assumptions that we believe are reasonable under the circumstances. Actual results could differ from those estimates. Key estimates relate primarily to determining the fair value of assets and liabilities assumed in business combinations, evaluation of contingencies, uncertain tax positions, excess inventory reserves, lease exit charges, and the fair value of stock-based awards. On an ongoing basis, management evaluates our estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In January 2017, the Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash, In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) Leases (Topic 842): Targeted Improvements In January 2016, the FASB issued ASU 2016-01, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). Revenue Recognition, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). In June 2018, the FASB issued ASU 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting In August 2018, the FASB issued ASU 2018-15, Intangibles — Goodwill and Other — Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue From Contract With Customer [Abstract]
Disaggregation of Revenue by Geography	The following table represents our revenue disaggregated by geography based on the billing address of the advertising customer: Three Months Ended September 30, Nine Months Ended September 30, 2017 2018 2017 2018 (in thousands) Revenue: North America (1) (2) $ 169,102 $ 196,320 $ 457,849 $ 534,878 Europe (3) 27,788 49,033 56,824 120,364 Rest of world 11,047 52,342 24,583 135,382 Total revenue $ 207,937 $ 297,695 $ 539,256 $ 790,624 (1) North America includes Mexico and the Caribbean. (2) United States revenue was $188.5 million and $162.8 million for the three months ended September 30, 2018 and 2017, respectively, and $515.4 million and $432.2 million for the nine months ended September 30, 2018 and 2017, respectively. (3) Europe includes Russia and Turkey.

Net Loss per Share (Tables)

Net Loss per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Numerators and Denominators of Basic and Diluted Net Loss per Share Computations for Common Stock	The numerators and denominators of the basic and diluted net loss per share computations for our common stock are calculated as follows for the three and nine months ended September 30, 2017 and 2018: Three Months Ended September 30, Nine Months Ended September 30, 2017 2018 2017 2018 (in thousands, except per share data) Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Numerator: Net loss $ (289,818 ) $ (62,288 ) $ (91,053 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (1,869,782 ) $ (561,713 ) $ (663,594 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Net loss attributable to common stockholders $ (289,818 ) $ (62,288 ) $ (91,053 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (1,869,782 ) $ (561,713 ) $ (663,594 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Denominator: Basic shares: Weighted-average common shares - Basic 806,353 173,304 253,336 968,090 94,364 247,464 688,690 206,894 244,420 932,767 95,598 248,928 Diluted shares: Weighted-average common shares - Diluted 806,353 173,304 253,336 968,090 94,364 247,464 688,690 206,894 244,420 932,767 95,598 248,928 Net loss per share attributable to common stockholders: Basic $ (0.36 ) $ (0.36 ) $ (0.36 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (2.71 ) $ (2.71 ) $ (2.71 ) $ (0.83 ) $ (0.83 ) $ (0.83 ) Diluted $ (0.36 ) $ (0.36 ) $ (0.36 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (2.71 ) $ (2.71 ) $ (2.71 ) $ (0.83 ) $ (0.83 ) $ (0.83 )
Schedule of Potentially Dilutive Shares Excluded from Calculation of Diluted Net Loss per Share	The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented: Three and Nine Months Ended September 30, 2017 2018 (in thousands) Stock options 31,106 16,999 Unvested RSUs 169,719 141,179

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Restricted Stock Activity	The following table summarizes the restricted stock activity during the nine months ended September 30, 2018: Class A Outstanding Restricted Stock Class B Outstanding Restricted Stock Weighted- Average Grant Date Fair Value per Restricted Stock (in thousands, except per share data) Unvested at December 31, 2017 156,005 7,791 $ 15.89 Granted 55,035 — $ 14.19 Vested (37,651 ) (5,218 ) $ 15.66 Forfeited (33,817 ) (966 ) $ 16.28 Unvested at September 30, 2018 139,572 1,607 $ 15.20
Summary of Stock Option Award Activity	The following table summarizes the stock option award activity under the Stock Plans during the nine months ended September 30, 2018: Class A Number of Shares Class B Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (1) (in thousands, except per share data) Outstanding at December 31, 2017 20,807 11,790 $ 4.10 4.99 $ 343,110 Granted 4,687 — $ 14.00 — $ — Exercised (10,393 ) (8,319 ) $ 2.56 — $ — Forfeited (1,402 ) (171 ) $ 15.21 — $ — Outstanding at September 30, 2018 13,699 3,300 $ 7.73 6.53 $ 60,036 (1) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the closing market price of our Class A common stock as of December 31, 2017 and September 30, 2018, respectively.
Summary of Total Stock-based Compensation Expense	Total stock-based compensation expense by function was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2018 2017 2018 (in thousands) Cost of revenue $ 1,951 $ 1,368 $ 23,882 $ 3,111 Research and development 143,303 95,329 1,025,231 265,447 Sales and marketing 27,254 25,082 207,538 63,264 General and administrative 49,194 5,030 1,202,200 84,617 Total $ 221,702 $ 126,809 $ 2,458,851 $ 416,439

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill for the nine months ended September 30, 2018 were as follows: Goodwill (in thousands) Balance as of December 31, 2017 $ 639,882 Foreign currency translation (5,696 ) Balance as of September 30, 2018 $ 634,186
Schedule of Intangible Assets	Intangible assets consisted of the following: September 30, 2018 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands except years) Domain names 1.7 $ 5,414 $ 4,013 $ 1,401 Trademarks 1.7 5,772 3,732 2,040 Acquired developed technology 4.0 179,849 70,450 109,399 Customer relationships 2.2 15,572 7,098 8,474 Patents 7.1 19,710 4,551 15,159 $ 226,317 $ 89,844 $ 136,473 December 31, 2017 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands except years) Domain names 2.1 $ 5,418 $ 3,210 $ 2,208 Trademarks 2.3 5,772 2,701 3,071 Acquired developed technology 4.7 180,396 45,435 134,961 Customer relationships 2.6 15,558 3,506 12,052 Patents 7.8 17,150 2,969 14,181 $ 224,294 $ 57,821 $ 166,473
Schedule of Estimated Intangible Asset Amortization Expense	As of September 30, 2018, the estimated intangible asset amortization expense for the next five years and thereafter is as follows: Estimated Amortization (in thousands) Remainder of 2018 $ 10,459 2019 38,687 2020 32,216 2021 25,154 2022 15,423 Thereafter 14,534 Total $ 136,473

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments for Operating Leases	Our future minimum lease payments required under these non-cancelable operating lease obligations as of September 30, 2018, are as follows: Operating Leases (in thousands) Remainder of 2018 $ 14,524 2019 60,877 2020 57,331 2021 54,672 2022 46,775 Thereafter 144,732 Total minimum lease payments $ 378,911
Schedule of Future Minimum Payments for Financing Leases	Our future minimum lease payments required under non-cancelable financing lease obligations, which exclusively relate to our build-to-suit leases, as of September 30, 2018, are as follows: Financing Leases (in thousands) Remainder of 2018 $ 1,187 2019 4,796 2020 4,947 2021 5,092 2022 5,167 Thereafter 20,785 Total minimum lease payments $ 41,974
Schedule of Future Minimum Contractual Commitments	The future minimum contractual commitments including commitments less than one year, as of September 30, 2018, inclusive of the changes related to the AWS October 2018 addendum, for each of the next five years are as follows: Minimum Commitment (in thousands) Remainder of 2018 $ 117,832 2019 555,167 2020 625,917 2021 686,785 2022 382,333 Thereafter — Total minimum commitments $ 2,368,034

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Summary of Financial Assets Measured at Fair Value on Recurring Basis	The following table sets forth our financial assets as of December 31, 2017 and September 30, 2018 that are measured at fair value on a recurring basis during the period: Fair Value December 31, 2017 September 30, 2018 (in thousands) Cash and cash equivalents Cash $ 267,715 $ 325,302 U.S. government securities 25,861 12,473 U.S. government agency securities 40,487 12,623 Total cash and cash equivalents $ 334,063 $ 350,398 Marketable securities U.S. government securities $ 1,350,581 $ 909,005 U.S. government agency securities 358,395 155,004 Total marketable securities $ 1,708,976 $ 1,064,009

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2018
Accumulated Other Comprehensive Income Loss [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss)	The table below presents the changes in accumulated other comprehensive income (loss) (“AOCI”) by component and the reclassifications out of AOCI: Changes in Accumulated Other Comprehensive Income (Loss) by Component Marketable Securities Foreign Currency Translation Total (in thousands) Balance at December 31, 2017 $ (1,078 ) $ 15,235 $ 14,157 OCI before reclassifications (1) 564 (8,251 ) (7,687 ) Amounts reclassified from AOCI (2) — — — Net current period OCI 564 (8,251 ) (7,687 ) Balance at September 30, 2018 $ (514 ) $ 6,984 $ 6,470 (1) Net of tax expense of $0.1 million for gains / losses on marketable securities. (2) Realized gains and losses on marketable securities are reclassified from AOCI into other income (expense), net in the consolidated statements of operations.

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2018
Property Plant And Equipment [Abstract]
Property and Equipment, Net by Geographic Area	The following table lists property and equipment, net by geographic area: As of December 31, 2017 As of September 30, 2018 (in thousands) Property and equipment, net: United States $ 146,862 $ 193,752 Rest of world (1) 19,900 22,857 Total property and equipment, net $ 166,762 $ 216,609 (1) No individual country exceeded 10% of our total property and equipment, net for any period presented.

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenue	$ 297,695	$ 207,937	$ 790,624	$ 539,256
North America
Disaggregation Of Revenue [Line Items]
Total revenue	196,320	169,102	534,878	457,849
Europe
Disaggregation Of Revenue [Line Items]
Total revenue	49,033	27,788	120,364	56,824
Rest of World
Disaggregation Of Revenue [Line Items]
Total revenue	$ 52,342	$ 11,047	$ 135,382	$ 24,583

Revenue - Disaggregation of R_2

Revenue - Disaggregation of Revenue by Geography (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenue	$ 297,695	$ 207,937	$ 790,624	$ 539,256
United States
Disaggregation Of Revenue [Line Items]
Total revenue	$ 188,500	$ 162,800	$ 515,400	$ 432,200

Net Loss per Share - Additional

Net Loss per Share - Additional Information (Details) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2017USD ($)$ / sharesshares	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)
Earnings Per Share [Line Items]
Net proceeds from initial public offering		$ 0	$ 0	$ 0	$ 2,657,797
IPO | Class A Common Stock
Earnings Per Share [Line Items]
Common stock, shares issued and sold | shares	160.3
Initial public offering price per share | $ / shares	$ 17
Net proceeds from initial public offering	$ 2,600,000
Underwriting discounts and commissions	68,100
Other stock offering expenses	$ 14,700
Convertible Preferred Stock Other Than Series FP Preferred Stock | IPO | Class B Common Stock
Earnings Per Share [Line Items]
Conversion of convertible preferred stock into common stock | shares	246.8
Series D, E, and F Preferred Stock | IPO | Class B Common Stock
Earnings Per Share [Line Items]
Conversion ratio				1
Series FP Preferred Stock | IPO | Class C Common Stock
Earnings Per Share [Line Items]
Conversion of convertible preferred stock into common stock | shares	215.9
Conversion ratio				1
Series A, A-1, B, and C Preferred Stock | IPO | Class B Common Stock
Earnings Per Share [Line Items]
Conversion ratio				1

Net Loss per Share - Numerators

Net Loss per Share - Numerators and Denominators of Basic and Diluted Net Loss per Share Computations for Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net loss	$ (325,148)	$ (443,159)	$ (1,064,243)	$ (3,095,089)
Basic shares:
Weighted-average common shares - Basic	1,309,918	1,232,993	1,277,293	1,140,004
Diluted shares:
Weighted-average common shares - Diluted	1,309,918	1,232,993	1,277,293	1,140,004
Net loss per share attributable to common stockholders:
Basic	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Diluted	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Class A Common Stock
Numerator:
Net loss	$ (240,299)	$ (289,818)	$ (777,184)	$ (1,869,782)
Net loss attributable to common stockholders	$ (240,299)	$ (289,818)	$ (777,184)	$ (1,869,782)
Basic shares:
Weighted-average common shares - Basic	968,090	806,353	932,767	688,690
Diluted shares:
Weighted-average common shares - Diluted	968,090	806,353	932,767	688,690
Net loss per share attributable to common stockholders:
Basic	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Diluted	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Class B Common Stock
Numerator:
Net loss	$ (23,423)	$ (62,288)	$ (79,652)	$ (561,713)
Net loss attributable to common stockholders	$ (23,423)	$ (62,288)	$ (79,652)	$ (561,713)
Basic shares:
Weighted-average common shares - Basic	94,364	173,304	95,598	206,894
Diluted shares:
Weighted-average common shares - Diluted	94,364	173,304	95,598	206,894
Net loss per share attributable to common stockholders:
Basic	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Diluted	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Class C Common Stock
Numerator:
Net loss	$ (61,426)	$ (91,053)	$ (207,407)	$ (663,594)
Net loss attributable to common stockholders	$ (61,426)	$ (91,053)	$ (207,407)	$ (663,594)
Basic shares:
Weighted-average common shares - Basic	247,464	253,336	248,928	244,420
Diluted shares:
Weighted-average common shares - Diluted	247,464	253,336	248,928	244,420
Net loss per share attributable to common stockholders:
Basic	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)
Diluted	$ (0.25)	$ (0.36)	$ (0.83)	$ (2.71)

Net Loss per Share - Schedule o

Net Loss per Share - Schedule of Potentially Dilutive Shares Excluded from Calculation of Diluted Net Loss per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Unvested RSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share	141,179	169,719	141,179	169,719
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share	16,999	31,106	16,999	31,106

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)Planshares	Dec. 31, 2017shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of share-based employee compensation plans | Plan	3
RSUs vested but not yet settled | shares	26.6	34.4
Pre-2017 RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 269.2
Weighted average recognition period	1 year 10 months 24 days
Post-2017 RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 1.1
Weighted average recognition period	3 years 2 months 12 days
Service condition satisfied, years	4 years
Post-2017 RSUs | First Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	10.00%
Post-2017 RSUs | Second Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	20.00%
Post-2017 RSUs | Third Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	30.00%
Post-2017 RSUs | Fourth Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	40.00%
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average recognition period	2 years 8 months 12 days
Unrecognized compensation cost related to stock options granted and assumed	$ 47.5

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Restricted Stock Activity (Details) - Restricted Stock shares in Thousands	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Weighted-Average Grant Date Fair Value per Restricted Stock
Weighted-Average Grant Date Fair Value per Restricted Stock, Unvested Beginning Balance | $ / shares	$ 15.89
Weighted-Average Grant Date Fair Value per Restricted Stock, Granted | $ / shares	14.19
Weighted-Average Grant Date Fair Value per Restricted Stock, Vested | $ / shares	15.66
Weighted-Average Grant Date Fair Value per Restricted Stock, Forfeited | $ / shares	16.28
Weighted-Average Grant Date Fair Value per Restricted Stock, Unvested Ending Balance | $ / shares	$ 15.20
Class A Common Stock
Outstanding Restricted Stock
Outstanding Restricted Stock, Unvested Beginning Balance	156,005
Outstanding Restricted Stock, Granted	55,035
Outstanding Restricted Stock, Vested	(37,651)
Outstanding Restricted Stock, Forfeited	(33,817)
Outstanding Restricted Stock, Unvested Ending Balance	139,572
Class B Common Stock
Outstanding Restricted Stock
Outstanding Restricted Stock, Unvested Beginning Balance	7,791
Outstanding Restricted Stock, Granted	0
Outstanding Restricted Stock, Vested	(5,218)
Outstanding Restricted Stock, Forfeited	(966)
Outstanding Restricted Stock, Unvested Ending Balance	1,607

Stockholders' Equity - Summar_2

Stockholders' Equity - Summary of Stock Option Award Activity (Details) - Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Weighted-Average Exercise Price
Weighted Average Exercise Price, Beginning balance	$ 4.10
Weighted Average Exercise Price, Granted	14
Weighted Average Exercise Price, Exercised	2.56
Weighted Average Exercise Price, Forfeited	15.21
Weighted Average Exercise Price, Ending balance	$ 7.73	$ 4.10
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (in years)	6 years 6 months 10 days	4 years 11 months 26 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Outstanding	$ 60,036	$ 343,110
Class A Common Stock
Number of Shares
Weighted Average Exercise Price, Beginning balance	20,807
Number of Shares, Granted	4,687
Number of Shares, Exercised	(10,393)
Number of Shares, Forfeited	(1,402)
Weighted Average Exercise Price, Ending balance	13,699	20,807
Class B Common Stock
Number of Shares
Weighted Average Exercise Price, Beginning balance	11,790
Number of Shares, Exercised	(8,319)
Number of Shares, Forfeited	(171)
Weighted Average Exercise Price, Ending balance	3,300	11,790

Stockholders' Equity - Summar_3

Stockholders' Equity - Summary of Total Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	$ 126,809	$ 221,702	$ 416,439	$ 2,458,851
Cost of Revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	1,368	1,951	3,111	23,882
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	95,329	143,303	265,447	1,025,231
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	25,082	27,254	63,264	207,538
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	$ 5,030	$ 49,194	$ 84,617	$ 1,202,200

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, beginning balance	$ 639,882
Foreign currency translation	(5,696)
Goodwill, ending balance	$ 634,186

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 226,317	$ 224,294
Accumulated Amortization	89,844	57,821
Net	$ 136,473	$ 166,473
Domain Names
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life - Years	1 year 8 months 12 days	2 years 1 month 6 days
Gross Carrying Amount	$ 5,414	$ 5,418
Accumulated Amortization	4,013	3,210
Net	$ 1,401	$ 2,208
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life - Years	1 year 8 months 12 days	2 years 3 months 18 days
Gross Carrying Amount	$ 5,772	$ 5,772
Accumulated Amortization	3,732	2,701
Net	$ 2,040	$ 3,071
Acquired Developed Technology
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life - Years	4 years	4 years 8 months 12 days
Gross Carrying Amount	$ 179,849	$ 180,396
Accumulated Amortization	70,450	45,435
Net	$ 109,399	$ 134,961
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life - Years	2 years 2 months 12 days	2 years 7 months 6 days
Gross Carrying Amount	$ 15,572	$ 15,558
Accumulated Amortization	7,098	3,506
Net	$ 8,474	$ 12,052
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Useful Life - Years	7 years 1 month 6 days	7 years 9 months 18 days
Gross Carrying Amount	$ 19,710	$ 17,150
Accumulated Amortization	4,551	2,969
Net	$ 15,159	$ 14,181

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 10.6	$ 9.7	$ 32.2	$ 20.8

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Estimated Intangible Asset Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract]
Remainder of 2018	$ 10,459
2,019	38,687
2,020	32,216
2,021	25,154
2,022	15,423
Thereafter	14,534
Net	$ 136,473	$ 166,473

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases (Details) $ in Thousands	Sep. 30, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
Remainder of 2018	$ 14,524
2,019	60,877
2,020	57,331
2,021	54,672
2,022	46,775
Thereafter	144,732
Total minimum lease payments	$ 378,911

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Oct. 31, 2018	Feb. 28, 2017
Loss Contingencies [Line Items]
Operating lease expense		$ 15,100,000	$ 13,500,000	$ 46,400,000	$ 38,200,000
Operating leases, remaining contractual obligation		69,500,000		69,500,000
Lease exit charges		29,340,000	$ 0	33,268,000	$ 0
Lease financing obligations included in other liabilities		16,600,000		16,600,000
General and Administrative
Loss Contingencies [Line Items]
Lease exit charges		29,300,000		33,300,000
Indemnification Agreement
Loss Contingencies [Line Items]
Liabilities recorded		$ 0		$ 0
Google Cloud Platform License Agreement
Loss Contingencies [Line Items]
Purchase commitment, description				The agreement has an initial term of five years and we are required to purchase at least $400.0 million of cloud services in each year of the agreement. For each of the first four years, up to 15% of this amount may be moved to a subsequent year. If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference.
Initial term of agreement	5 years
Minimum amount of services to be purchased in each year	$ 400,000,000
Initial period required to purchase minimum amount of services	4 years
Google Cloud Platform License Agreement | Maximum
Loss Contingencies [Line Items]
Purchase commitment, percentage of minimum purchase requirement that can be moved to subsequent year	15.00%
AWS Enterprise Agreement, Cloud Services
Loss Contingencies [Line Items]
Purchase commitment, description				In March 2016, we entered into the AWS Enterprise Agreement for the use of cloud services from Amazon Web Services, Inc. (“AWS”) which was amended in March 2016 and February 2017. The agreement will continue indefinitely until terminated by either party. Under the February 2017 addendum, we committed to spend $1.0 billion on AWS services between January 2017 and December 2021. That addendum was amended in October 2018, and we are now committed to spend an aggregate of $1.1 billion between January 2017 and December 2022 on AWS services ($90.0 million in 2018, $150.0 million in 2019, $215.0 million in 2020, $280.0 million in 2021, and $349.0 million in 2022). If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference. Any such payment may be applied to future use of AWS services during the addendum term, although it will not count towards meeting the future minimum purchase commitments under the addendum.
Minimum purchase commitment to spend between January 2017 and December 2021							$ 1,000,000,000
AWS Enterprise Agreement, Cloud Services | Subsequent Event [Member]
Loss Contingencies [Line Items]
Minimum purchase commitment to spend between January 2017 and December 2022						$ 1,100,000,000
Minimum purchase commitment, due in 2018						90,000,000
Minimum purchase commitment, due in 2019						150,000,000
Minimum purchase commitment, due in 2020						215,000,000
Minimum purchase commitment, due in 2021						280,000,000
Minimum purchase commitment, due in 2022						$ 349,000,000

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Financing Leases (Details) - Build-to-suit Leases $ in Thousands	Sep. 30, 2018USD ($)
Commitments And Contingencies Disclosure [Line Items]
Remainder of 2018	$ 1,187
2,019	4,796
2,020	4,947
2,021	5,092
2,022	5,167
Thereafter	20,785
Total minimum lease payments	$ 41,974

Commitments and Contingencies_4

Commitments and Contingencies - Schedule of Future Minimum Contractual Commitments (Details) $ in Thousands	Sep. 30, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
Remainder of 2018	$ 117,832
2,019	555,167
2,020	625,917
2,021	686,785
2,022	382,333
Thereafter	0
Total minimum commitments	$ 2,368,034

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	$ 1,064,009	$ 1,708,976
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	350,398	334,063
Marketable securities	1,064,009	1,708,976
Fair Value, Measurements, Recurring | Cash
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	325,302	267,715
Fair Value, Measurements, Recurring | U.S. Government Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	12,473	25,861
Marketable securities	909,005	1,350,581
Fair Value, Measurements, Recurring | U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalents	12,623	40,487
Marketable securities	$ 155,004	$ 358,395

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
U.S. Government Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized cost with maturities less than one year	$ 909.4	$ 1,400
U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized cost with maturities less than one year	$ 155	$ 358.6

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income tax benefit (expense)	$ (244)	$ 12,300	$ (2,899)	$ 15,102

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedules of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period			$ 2,992,327
OCI before reclassifications			(7,687)
Total other comprehensive income (loss), net of tax	$ (1,737)	$ 8,092	(7,687)	$ 13,739
Balance, end of period	2,384,092		2,384,092
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period			(1,078)
OCI before reclassifications			564
Total other comprehensive income (loss), net of tax			564
Balance, end of period	(514)		(514)
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period			15,235
OCI before reclassifications			(8,251)
Total other comprehensive income (loss), net of tax			(8,251)
Balance, end of period	6,984		6,984
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period			14,157
Balance, end of period	$ 6,470		$ 6,470

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Tax expense for gains / losses on marketable securities	$ 0.1

Property and Equipment, Net - P

Property and Equipment, Net - Property and Equipment, Net by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property and equipment, net:
Total property and equipment, net	$ 216,609	$ 166,762
United States
Property and equipment, net:
Total property and equipment, net	193,752	146,862
Rest of World
Property and equipment, net:
Total property and equipment, net	$ 22,857	$ 19,900

Property and Equipment, Net -_2

Property and Equipment, Net - Property and Equipment, Net by Geographic Area (Parenthetical) (Details) - Country	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Geographic Concentrations | Property and Equipment Net | Rest of World
Revenues From External Customers And Long Lived Assets [Line Items]
Number of individual country exceeded 10% of total property and equipment	0	0