Juniper Networks (JNPR) 10-K 26 Feb 10 2009 FY Annual report Financial data

Document and Company Informatio

Document and Company Information (USD $)
	12 Months Ended Dec. 31, 2009	Feb. 22, 2010	Jun. 30, 2009
Document and Company Information [Abstract]
Entity Registrant Name	JUNIPER NETWORKS INC
Entity Central Index Key	0001043604
Document Type	10-K
Document Period End Date	2009-12-31
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$8,114,000,000
Entity Common Stock, Shares Outstanding		521,197,000

Consolidated Statements of Oper

Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data	12 Months Ended Dec. 31, 2009	12 Months Ended Dec. 31, 2008	12 Months Ended Dec. 31, 2007
Net revenues:
Product	$2,567,992	$2,910,960	$2,326,983
Service	747,920	661,416	509,105
Total net revenues	3,315,912	3,572,376	2,836,088
Cost of revenues:
Product	841,722	867,595	676,258
Service	316,080	298,371	251,380
Total cost of revenues	1,157,802	1,165,966	927,638
Gross margin	2,158,110	2,406,410	1,908,450
Operating expenses:
Research and development	741,708	731,151	622,961
Sales and marketing	734,038	782,940	666,688
General and administrative	159,459	144,837	116,489
Amortization of purchased intangible assets	10,416	43,508	85,896
Litigation settlement charges (gain)	182,331	9,000	(5,278)
Restructuring charges	19,463	0	691
Other charges	0	0	13,941
Total operating expenses	1,847,415	1,711,436	1,501,388
Operating income	310,695	694,974	407,062
Interest and other income, net	6,928	48,749	96,776
(Loss) gain on equity investments	(5,562)	(14,832)	6,745
Income before income taxes and noncontrolling interest	312,061	728,891	510,583
Provision for income taxes	196,833	217,142	149,753
Consolidated net income	115,228	511,749	360,830
Plus: Net loss attributable to noncontrolling interest	1,771	0	0
Net income attributable to Juniper Networks	$116,999	$511,749	$360,830
Net income per share attributable to Juniper Networks common stockholders:
Basic	0.22	0.96	0.67
Diluted	0.22	0.93	0.62
Shares used in computing net income per share:
Basic	523,603	530,337	537,767
Diluted	534,015	551,433	579,145

Consolidated Balance Sheets

Consolidated Balance Sheets (USD $)
In Thousands	Dec. 31, 2009	Dec. 31, 2008
Current assets:
Cash and cash equivalents	$1,604,723	$2,019,084
Short-term investments	570,522	172,896
Accounts receivable, net of allowance for doubtful accounts of $9,116 for 2009 and $9,738 for 2008	458,652	429,970
Deferred tax assets, net	196,318	145,230
Prepaid expenses and other current assets	48,744	49,026
Total current assets	2,878,959	2,816,206
Property and equipment, net	455,651	436,433
Long-term investments	483,505	101,415
Restricted cash	53,732	43,442
Purchased intangible assets, net	13,834	28,861
Goodwill	3,658,602	3,658,602
Long-term deferred tax assets, net	10,555	71,079
Other long-term assets	35,425	31,303
Total assets	7,590,263	7,187,341
Current liabilities:
Accounts payable	242,591	249,854
Accrued compensation	176,551	160,471
Accrued warranty	38,199	40,090
Deferred revenue	571,652	459,749
Income taxes payable	34,936	33,047
Accrued litigation settlements	169,330	0
Other accrued liabilities	142,526	113,399
Total current liabilities	1,375,785	1,056,610
Long-term deferred revenue	181,937	130,514
Long-term income tax payable	170,245	78,164
Other long-term liabilities	37,531	20,648
Juniper Networks stockholders' equity:
Convertible preferred stock, $0.00001 par value; 10,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.00001 par value, 1,000,000 shares authorized; 519,341 and 526,752 shares issued and outstanding at December 31, 2009, and 2008, respectively	5	5
Additional paid-in capital	9,060,089	8,811,497
Accumulated other comprehensive loss	(1,433)	(4,245)
Accumulated deficit	(3,236,525)	(2,905,852)
Total Juniper Networks stockholders' equity	5,822,136	5,901,405
Noncontrolling interest	2,629	0
Total equity	5,824,765	5,901,405
Total liabilities and stockholders' equity	$7,590,263	$7,187,341

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands	Dec. 31, 2009	Dec. 31, 2008
Current assets:
Accounts receivable, doubtful accounts	$9,116	$9,738
Juniper Networks stockholders' equity:
Convertible preferred stock, par value	0.00001	0.00001
Convertible preferred stock, shares authorized	10,000	10,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Common stock, par value	0.00001	0.00001
Common stock, shares authorized	1,000,000	1,000,000
Common stock, shares issued	519,341	526,752
Common stock, shares outstanding	519,341	526,752

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (USD $)
In Thousands	12 Months Ended Dec. 31, 2009	12 Months Ended Dec. 31, 2008	12 Months Ended Dec. 31, 2007
Cash flows from operating activities:
Consolidated net income	$115,228	$511,749	$360,830
Adjustments to reconcile consolidated net income to net cash from operating activities:
Depreciation and amortization	148,373	172,453	193,166
Stock-based compensation	139,659	108,133	87,990
Loss (gain) on equity investments	5,562	14,832	(6,745)
Excess tax benefits from share-based compensation	(3,510)	(40,182)	(19,686)
Deferred income taxes	9,436	14,314	865
Other non-cash charges	0	613	2,765
Changes in operating assets and liabilities:
Accounts receivable, net	(28,682)	(50,211)	(120,904)
Prepaid expenses and other assets	(8,520)	(539)	(3,934)
Accounts payable	(2,422)	19,770	34,938
Accrued compensation	16,079	1,761	48,259
Accrued warranty	(1,891)	2,640	2,622
Income taxes payable	43,672	49,554	85,191
Accrued litigation settlements	169,330	0	0
Other accrued liabilities	30,457	(6,702)	(6,524)
Deferred revenue	163,326	76,994	127,690
Net cash provided by operating activities	796,097	875,179	786,523
Cash flows from investing activities:
Purchases of property and equipment	(153,101)	(164,604)	(146,858)
Purchases of available-for-sale investments	(1,461,532)	(474,007)	(298,615)
Proceeds from sales of available-for-sale investments	285,379	130,237	684,666
Proceeds from maturities of available-for-sale investments	398,435	369,114	344,415
Changes in restricted cash	(11,276)	(8,094)	(7,407)
Purchases of privately-held equity investments, net	(6,205)	(2,458)	(4,075)
Payments made in connection with business acquisitions, net	0	0	(375)
Net cash (used in) provided by investing activities	(948,300)	(149,812)	571,751
Cash flows from financing activities:
Proceeds from issuance of common stock	164,207	119,450	355,007
Purchases and retirement of common stock	(453,888)	(604,700)	(1,623,190)
Net proceeds from customer financing arrangements	19,613	22,963	10,000
Redemption of convertible debt	0	(288)	0
Excess tax benefits from share-based compensation	3,510	40,182	19,686
Proceeds from noncontrolling interest	4,400	0	0
Net cash used in financing activities	(262,158)	(422,393)	(1,238,497)
Net (decrease) increase in cash and cash equivalents	(414,361)	302,974	119,777
Cash and cash equivalents at beginning of period	2,019,084	1,716,110	1,596,333
Cash and cash equivalents at end of period	1,604,723	2,019,084	1,716,110
Supplemental disclosures of cash flow information:
Cash paid for interest	5,417	5,224	1,495
Cash paid for taxes	139,969	147,999	57,856
Supplemental disclosure of non-cash financing activities:
Common stock issued in connection with conversion of the senior notes	$0	$399,208	$448

Consolidated Statements of Shar

Consolidated Statements of Shareholders Equity (USD $)
In Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit	Noncontrolling Interest	Total
Balance at Dec. 31, 2006	$6	$7,646,047	$1,266	($1,532,235)		$6,115,084
Balance, shares at Dec. 31, 2006	569,234
Cumulative effect from the adoption of ASC Topic 740-10 (formerly FIN 48)				(19,195)		(19,195)
Issuance of shares in connection with Employee Stock Purchase Plan		10,502				10,502
Issuance of shares in connection with Employee Stock Purchase Plan, shares	615
Exercise of stock options by employees, net of repurchases		345,585				345,585
Exercise of stock options by employees, net of repurchases, shares	22,399
Release of escrow related to an acquisition, net of cancelled escrow shares		14,840				14,840
Release of escrow related to an acquisition, net of cancelled escrow shares, shares	(15)
Issuance of shares in connection with vesting of restricted share units	3
Issuance of shares in connection with conversion of the convertible senior notes		448				448
Issuance of shares in connection with conversion of the convertible senior notes, shares	22
Repurchase and retirement of common stock	(1)	(461)		(1,622,728)		(1,623,190)
Repurchase and retirement of common stock, shares	(69,443)
Stock-based compensation expense		94,453				94,453
Adjustment related to tax benefit from employee stock option plans		43,518				43,518
Net income (loss)				360,830		360,830
Other comprehensive income (loss):
Change in unrealized gain (loss) on investments, net tax of nil			3,169			3,169
Foreign currency translation gains (loss), net tax of nil			7,816			7,816
Balance at Dec. 31, 2007	5	8,154,932	12,251	(2,813,328)		5,353,860
Balance, shares at Dec. 31, 2007	522,815
Issuance of shares in connection with Employee Stock Purchase Plan		35,879				35,879
Issuance of shares in connection with Employee Stock Purchase Plan, shares	1,590
Exercise of stock options by employees, net of repurchases		82,608				82,608
Exercise of stock options by employees, net of repurchases, shares	5,701
Exercise of warrants in connection with acquisitions	8
Issuance of shares in connection with vesting of restricted share units	1,904
Issuance of shares in connection with conversion of the convertible senior notes		399,208				399,208
Issuance of shares in connection with conversion of the convertible senior notes, shares	19,822
Repurchase and retirement of common stock		(427)		(604,273)		(604,700)
Repurchase and retirement of common stock, shares	(25,088)
Stock-based compensation expense		108,133				108,133
Adjustment related to tax benefit from employee stock option plans		31,164				31,164
Net income (loss)				511,749		511,749
Other comprehensive income (loss):
Change in unrealized gain (loss) on investments, net tax of nil			2,547			2,547
Foreign currency translation gains (loss), net tax of nil			(19,043)			(19,043)
Balance at Dec. 31, 2008	5	8,811,497	(4,245)	(2,905,852)		5,901,405
Balance, shares at Dec. 31, 2008	526,752
Issuance of shares in connection with Employee Stock Purchase Plan		39,164				39,164
Issuance of shares in connection with Employee Stock Purchase Plan, shares	3,221
Exercise of stock options by employees, net of repurchases		126,284				126,284
Exercise of stock options by employees, net of repurchases, shares	8,651
Issuance of shares in connection with vesting of restricted share units	1,432
Purchase of subsidiary shares by noncontrolling interest					4,400	4,400
Repurchase and retirement of common stock		(6,216)		(447,672)		(453,888)
Repurchase and retirement of common stock, shares	(20,715)
Stock-based compensation expense		139,659				139,659
Adjustment related to tax benefit from employee stock option plans		(50,299)				(50,299)
Net income (loss)				116,999	(1,771)	115,228
Other comprehensive income (loss):
Change in unrealized gain (loss) on investments, net tax of nil			(2,757)			(2,757)
Foreign currency translation gains (loss), net tax of nil			5,569			5,569
Balance at Dec. 31, 2009	$5	$9,060,089	($1,433)	($3,236,525)	$2,629	$5,824,765
Balance, shares at Dec. 31, 2009	519,341

Summary of Significant Accounti

Summary of Significant Accounting Policies
	12 Months Ended Dec. 31, 2009 USD / shares
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note1. Summary of Significant Accounting Policies Description of Business Juniper Networks, Inc. (Juniper Networks or the Company) designs, develops, and sells innovative products and services that together provide its customers with high-performance network infrastructure that creates responsive and trusted environments for accelerating the deployment of services and applications over a single network. The Company has the following two segments: Infrastructure and Service Layer Technologies (SLT). The Infrastructure segment primarily offers scalable Internet Protocol (IP)-router and Ethernet switching products that are used to control and direct network traffic. The SLT segment offers networking solutions that meet a broad array of its customers priorities, from securing the network and the data on the network, to maximizing existing bandwidth and acceleration of applications across a distributed network. Both segments offer worldwide services, including technical support and professional services, as well as educational and training programs to their customers. Basis of Presentation The consolidated financial statements, which include the Company and its wholly-owned subsidiaries are prepared in accordance with U.S.generally accepted accounting principles (U.S.GAAP). All inter-company balances and transactions have been eliminated. The information included in this Annual Report on Form10-K should be read in conjunction with Managements Discussion and Analysis of Financial Condition and Results of Operations, Risk Factors, and Quantitative and Qualitative Disclosures About Market Risk. In 2009, the Company held a majority interest in a joint venture with Nokia Siemens Networks B.V. (NSN). As of December31, 2009, the Company owned a 60percent interest in the joint venture. Given the Companys majority ownership interest in the joint venture, the accounts of the joint venture have been consolidated with the accounts of the Company, and a noncontrolling interest has been recorded for the noncontrolling investors interests in the net assets and operations of the joint venture. Use of Estimates The preparation of the financial statements and related disclosures in conformity with U.S.GAAP requires the Company to make judgments, assumptions, and estimates that affect the amounts reported in the consolidated financial statements and the accompanying notes. The Company bases its estimates and assumptions on current facts, historical experience, and various other factors that it believes are reasonable under the circumstances, to determine the carrying values of assets and liabilities that are not readily apparent from other sources. The critical accounting policies described below are significantly affected by critical accounting estimates. Such accounting policies require significant judgments, assumptions, and estimates used in the preparation of the consolidated financial statements and actual results could differ materially from the amounts reported based on these policies. To the extent there are material differences between our estimates and the actual results, our future consolidated results of o

Net Income Per Share

Net Income Per Share
	12 Months Ended Dec. 31, 2009 USD / shares
Net Income Per Share [Abstract]
Net Income Per Share	Note2. Net Income Per Share Basic net income per share is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding for that period. Diluted net income per share is computed giving effect to all dilutive potential common shares that were outstanding during the period on a weighted average basis. Dilutive potential common shares consist of shares issuable upon conversion of senior notes, if any, and various employee stock awards, including common shares issuable upon exercise of stock options, vesting of RSUs, and vesting of performance shares. The following table presents the calculation of basic and diluted net income per share attributable to Juniper Networks (in millions, except per share amounts): Years Ended December31, 2009 2008 2007 Numerator: Net income attributable to Juniper Networks: $ 117.0 $ 511.7 $ 360.8 Denominator: Weighted-average shares used to compute basic net income per share 523.6 530.3 537.8 Effect of dilutive securities: Shares issuable upon conversion of the Senior Notes 8.8 19.8 Employee stock awards 10.4 12.3 21.5 Weighted-average shares used to compute diluted net income per share 534.0 551.4 579.1 Net income per share attributable to Juniper Networks common stockholders: Basic $ 0.22 $ 0.96 $ 0.67 Diluted $ 0.22 $ 0.93 $ 0.62 Employee stock awards of approximately 38.9million shares and 33.0million shares of the Companys common stock were not included in the computation of diluted earnings per share for the years ended December31, 2009, and December31, 2008, respectively, because their effect would have been anti-dilutive.

Cash, Cash Equivalents, and Inv

Cash, Cash Equivalents, and Investments
	12 Months Ended Dec. 31, 2009 USD / shares
Cash, Cash Equivalents, and Investments [Abstract]
Cash, Cash Equivalents, and Investments	Note3. Cash, Cash Equivalents, and Investments Cash and Cash Equivalents The following table summarizes the Companys cash and cash equivalents (in millions): As of December31, 2009 2008 Cash: Demand deposits $ 427.2 $ 285.9 Time deposits 127.9 125.1 Total cash 555.1 411.0 Cash equivalents: U.S. government securities 141.8 Government-sponsored enterprise obligations 94.8 Commercial paper 17.0 90.4 Money market funds 1,032.6 1,281.1 Total cash equivalents 1,049.6 1,608.1 Total cash and cash equivalents $ 1,604.7 $ 2,019.1 Investments in Available-for-Sale and Trading Securities The following table summarizes the Companys unrealized gains and losses, and fair value of investments designated as trading or available-for-sale, as of December31, 2009, and 2008 (in millions): Gross Gross Amortized Unrealized Unrealized Estimated Fair Cost Gains Losses Value As of December31, 2009: Fixed income securities: U.S. government securities $ 245.0 $ 0.1 $ $ 245.1 Government-sponsored enterprise obligations 212.0 0.6 (0.3 ) 212.3 Foreign government debt securities 96.4 0.3 (0.1 ) 96.6 Corporate debt securities 488.2 2.0 (0.3 ) 489.9 Total fixed income securities 1,041.6 3.0 (0.7 ) 1,043.9 Publicly-traded equity securities 10.1 10.1 Total $ 1,051.7 $ 3.0 $ (0.7 ) $ 1,054.0 Reported as: Short-term investments $ 569.5 $ 1.0 $ $ 570.5 Long-term investments 482.2 2.0 (0.7 ) 483.5 Total $ 1,051.7 $ 3.0 $ (0.7 ) $ 1,054.0 Gross Gross Amortized Unrealized Unrealized Estimated Fair Cost Gains Losses Value As of December31, 2008: Fixed income securities: U.S. government securities $ 86.6 $ 0.1 $ $

Fair Value Measurements

Fair Value Measurements
	12 Months Ended Dec. 31, 2009 USD / shares
Fair Value Measurements [Abstract]
Fair Value Measurements	Note4. Fair Value Measurements Fair Value Hierarchy The Company determines the fair values of its financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value: Level1 Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level2 Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level3 Inputs are unobservable inputs based on the Companys assumptions. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following tables provide a summary of the assets and liabilities measured at fair value on a recurring basis (in millions): Fair Value Measurements at December31, 2009, Using Quoted Prices in Significant Other Significant Other Active Markets Observable Unobservable for Identical Remaining Remaining Assets Inputs Inputs Total (Level 1) (Level 2) (Level 3) Assets measured at fair value: U.S. government securities(1) $ 72.6 $ 192.3 $ $ 264.9 Government-sponsored enterprise obligations 193.3 19.0 212.3 Foreign government debt securities 26.3 70.3 96.6 Corporate debt securities 489.9 489.9 Commercial paper 17.0 17.0 Money market funds(2) 1,062.7 1,062.7 Publicly-traded securities 10.1 10.1 Total assets 1,365.0 788.5 2,153.5 Liabilities measured at fair value: Derivative liability (1.3 ) (1.3 )

Goodwill and Purchased Intangib

Goodwill and Purchased Intangible Assets
	12 Months Ended Dec. 31, 2009 USD / shares
Goodwill and Purchased Intangible Assets [Abstract]
Goodwill and Purchased Intangible Assets	Note5. Goodwill and Purchased Intangible Assets Goodwill The changes in the carrying amount of goodwill during the two years ended December31, 2009, are as follows (in millions): Balance at Adjustments Escrow and Balance at December31, to Existing Other December31, Segments 2008 Acquisitions Goodwill Additions 2009 Infrastructure $ 1,500.5 $ $ $ $ 1,500.5 Service Layer Technologies 2,158.1 2,158.1 Total $ 3,658.6 $ $ $ $ 3,658.6 Balance at Adjustments Escrow and Balance at December31, to Existing Other December31, Segments 2007 Reallocation Goodwill Additions 2008 Infrastructure $ 976.6 $ 523.9 $ $ $ 1,500.5 Service Layer Technologies 1,879.7 278.4 2,158.1 Service 802.3 (802.3 ) Total $ 3,658.6 $ $ $ $ 3,658.6 In 2009 and 2008, there were no additions to goodwill. In the first quarter of 2008, the Company realigned its organizational structure to eliminate its Service segment and to include its service business into the related Infrastructure and SLT segments. As a result, the Company, with the assistance of an external service provider, reallocated goodwill of the former Service segment to the Infrastructure and SLT segments based on a relative fair value approach. Fair value was based on comparative market values and discounted cash flows. There was no indication of impairment when goodwill was reallocated to the new reporting segments. The Company performed goodwill impairment reviews as of November1, 2009 and 2008, and concluded that there was no impairment in the years ended 2009 and 2008. Purchased Intangible Assets The following table presents the Companys purchased intangible assets with definite lives (in millions): Accumulated Gross Amortization Impairment Net As of December31, 2009: Technologies and patents $ 380.0 $ (376.0 ) $ $ 4.0 Other 68.9 (59.1 ) 9.8 Total $ 448.9 $ (435.1 ) $ $ 13.8 As of December31, 2008:

Other Financial Information

Other Financial Information
	12 Months Ended Dec. 31, 2009 USD / shares
Other Financial Information [Abstract]
Other Financial Information	Note6. Other Financial Information Property and Equipment Property and equipment consist of the following (in millions): As of December31, 2009 2008 Computers and equipment $ 492.4 $ 399.7 Software 58.3 58.1 Leasehold improvements 158.0 143.2 Furniture and fixtures 21.5 20.9 Land 192.4 192.4 Property and equipment, gross 922.6 814.3 Accumulated depreciation (466.9 ) (377.9 ) Property and equipment, net $ 455.7 $ 436.4 Depreciation expense was $133.0million, $123.5million, and $101.8million in 2009, 2008, and 2007, respectively. Deferred Revenue Amounts billed in excess of revenue recognized are included as deferred revenue in the accompanying consolidated balance sheets. Product deferred revenue, net of the related deferred cost of revenue, includes shipments to end-users, value-added resellers, and distributors. Below is a breakdown of the Companys deferred revenue (in millions): As of December31, 2009 2008 Product: Deferred gross product revenue $ 391.3 $ 268.0 Deferred cost of product revenue (150.0 ) (110.0 ) Deferred product revenue, net 241.3 158.0 Deferred service revenue 512.3 432.3 Total $ 753.6 $ 590.3 Reported as: Current $ 571.7 $ 459.8 Long-term 181.9 130.5 Total $ 753.6 $ 590.3 Warranties The Company provides for the estimated cost of product warranties at the time revenue is recognized. This provision is reported as accrued warranty within current liabilities on its consolidated balance sheets. Changes in the Companys accrued warranty are as follows (in millions): Years Ended December31, 2009 2008 Beginning balance $ 40.1 $ 37.5 Provisions made during the period, net 46.9 47.8 Change in estimate (5.6 ) Actual costs incurred during the period (43.2 ) (45.2 ) Ending balance $ 38.2 $ 40.1 Restructuring Liabilities During 2009, the Company implemented a restructuring plan (the 2009 Restructuring Plan) in an effort to better align its business operations with the current market and macroeconomic conditions. The restructuring plan included a restructuring of certain business functions that resulted in reductions of workforce and facilities. The Company recorded $19.5million in restructuring charges during the year ended December31, 2009, associated with the 2009 Restr

Financing Arrangements

Financing Arrangements
	12 Months Ended Dec. 31, 2009 USD / shares
Financing Arrangements [Abstract]
Financing Arrangements	Note7. Financing Arrangements The Company has customer financing arrangements to sell its accounts receivable to a major third-party financing provider. The program does not and is not intended to affect the timing of revenue recognition because the Company only recognizes revenue upon sell-through. Under the financing arrangements, proceeds from the financing provider are due to the Company 30days from the sale of the receivable. In these transactions with the financing provider, the Company has surrendered control over the transferred assets. The accounts receivable have been isolated from the Company and put beyond the reach of creditors, even in the event of bankruptcy. The Company does not maintain effective control over the transferred assets through obligations or rights to redeem, transfer, or repurchase the receivables after they have been transferred. Pursuant to the financing arrangements for the sale of receivables, the Company sold net receivables of $449.8million and $427.2million in 2009 and 2008, respectively. In 2009 and 2008, the Company received cash proceeds of $426.3million and $392.7million, respectively. The amounts owed by the financing provider recorded as accounts receivable on the Companys consolidated balance sheets as of December31, 2009, and December31, 2008, were $89.8million and $73.9million, respectively. The portion of the receivable financed that has not been recognized as revenue is accounted for as a financing arrangement and is included in other accrued liabilities in the consolidated balance sheet. As of December31, 2009, and December31, 2008, the estimated amounts of cash received from the financing provider that has not been recognized as revenue from its distributors was $52.6million and $33.0million, respectively.

Derivative Instruments

Derivative Instruments
	12 Months Ended Dec. 31, 2009 USD / shares
Derivative Instruments[Abstract]
Derivative Instruments	Note8. Derivative Instruments The Company uses derivatives partially to offset its market exposure to fluctuations in certain foreign currencies and does not enter into derivatives for speculative or trading purposes. Cash Flow Hedges The Company uses foreign currency forward or option contracts to hedge certain forecasted foreign currency transactions relating to cost of services and operating expenses. The derivatives are intended to protect the U.S.Dollar equivalent of the Companys planned cost of services and operating expenses denominated in foreign currencies. These derivatives are designated as cash flow hedges. Execution of these cash flow hedge derivatives typically occurs every month with maturities of less than one year. The effective portion of the derivatives gain or loss is initially reported as a component of accumulated other comprehensive income (loss), and upon occurrence of the forecasted transaction, is subsequently reclassified into the cost of services or operating expense line item to which the hedged transaction relates. The Company records any ineffectiveness of the hedging instruments, which was immaterial during each of the three years ended December31, 2009, in interest and other income, net on its consolidated statements of operations. Cash flows from such hedges are classified as operating activities. All amounts within other comprehensive income (loss) are expected to be reclassified into income within the next 12months. Non-Designated Hedges The Company also uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in foreign currencies. These hedges do not qualify for special hedge accounting treatment. These derivatives are carried at fair value with changes recorded in interest and other income, net. Changes in the fair value of these derivatives are largely offset by re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. The derivatives have maturities of approximately two months. The following table summarizes the total fair value of the Companys derivative instruments as of December31, 2009, (in millions): Asset Derivatives Liability Derivatives Balance Sheet Fair Balance Sheet Fair Location Value Location Value Derivatives designated as hedging instruments: Foreign exchange forward contracts Other current assets $ 0.2 Other current liabilities $ 1.5 Total $ 0.2 $ 1.5 The following represents the Companys top three outstanding derivative positions by currency as of December31, 2009, (in millions): Buy Buy Buy EUR GBP INR Foreign currency forward contracts:

Stockholders Equity

Stockholders Equity
	1/1/2009 - 12/31/2009 USD / shares
Stockholders' Equity [Abstract]
Stockholders' Equity	Note9. Stockholders Equity Stock Repurchase Activities In March 2008, the Companys Board of Directors (the Board) approved a $1.0billion stock repurchase program (the 2008 Stock Repurchase Program). Under this program, the Company repurchased approximately 20.7million shares of our common stock at an average price of $21.91 per share for a total purchase price of $453.5million in 2009. As of December31, 2009, the 2008 Stock Repurchase Program had remaining authorized funds of $318.6million. In 2008, the Company repurchased $604.7million, or 25.1million shares of common stock, at an average purchase price of $24.10 per share, under the 2008 Stock Repurchase Program and the $2.0billion stock repurchase program approved in 2006 and 2007 (the 2006 Stock Repurchase Program). As of December31, 2008, the 2006 Stock Repurchase Program had no remaining authorized funds available for future stock repurchases. All shares of common stock purchased under the 2006 and 2008 Stock Repurchase Programs have been retired. Future share repurchases under the Companys 2008 Stock Repurchase Program will be subject to a review of the circumstances in place at the time and will be made from time to time in private transactions or open market purchases as permitted by securities laws and other legal requirements. This program may be discontinued at any time. See Note16, Subsequent Events, for discussion of our stock repurchase activity in 2010. Convertible Preferred Stock There are 10,000,000shares of convertible preferred stock with a par value of $0.00001 per share authorized for issuance. No preferred stock was issued and outstanding as of December31, 2009, and December31, 2008.

Employee Benefit Plans

Employee Benefit Plans
	12 Months Ended Dec. 31, 2009 USD / shares
Employee Benefit Plans [Abstract]
Employee Benefit Plans	Note10. Employee Benefit Plans Stock Option Plans 2006 Equity Incentive Plan On May18, 2006, the Companys stockholders adopted the Companys 2006 Equity Incentive Plan (the 2006 Plan) to enable the granting of incentive stock options, nonstatutory stock options, RSUs, restricted stock, stock appreciation rights, performance shares, performance units, deferred stock units, and dividend equivalents to the employees and consultants of the Company. The 2006 Plan also provides for automatic, non-discretionary awards of nonstatutory stock options and RSUs to the Companys non-employee members of the Board. The maximum aggregate number of shares authorized under the 2006 Plan is 64,500,000shares of common stock, plus the addition of any shares subject to outstanding options under the Companys Amended and Restated 1996 Stock Plan (the 1996 Plan) and the Companys 2000 Nonstatutory Stock Option Plan (the 2000 Plan) to the extent that they expire unexercised after May18, 2006, up to a maximum of 75,000,000 additional shares of common stock. Options granted under the 2006 Plan have a maximum term of seven years from the grant date, and generally vest and become exercisable over a four-year period. Subject to the terms of change of control severance agreements, and except for a limited number of shares allowed under the 2006 Plan, restricted stock, performance shares, RSUs, or deferred stock units that vest solely based on continuing employment or provision of services will vest in full no earlier than the three-year anniversary of the grant date, or in the event vesting is based on factors other than continued future provision of services, such awards will vest in full no earlier than the one-year anniversary of the grant date. The 2006 Plan provides each non-employee director an automatic grant of an option to purchase 50,000shares of common stock on the date such individual first becomes a director, whether through election by the stockholders of the Company or appointment by the Board to fill a vacancy (the First Option). In addition, at each of the Companys annual stockholder meetings (i)each non-employee director who was a non-employee director on the date of the prior years annual stockholder meeting shall be automatically granted RSUs for a number of shares equal to the Annual Value (as defined below), and (ii)each non-employee director who was not a non-employee director on the date of the prior years annual stockholder meeting shall receive a RSU award for a number of shares determined by multiplying the Annual Value by a fraction, the numerator of which is the number of days since the non-employee director received their First Option, and the denominator of which is 365, rounded down to the nearest whole share. Each RSU award specified in (i)and (ii)are referred to herein as an Annual Award. The Annual Value means the number of RSUs equal to $125,000 divided by the average daily closing price of the Companys common stock over the six month period ending on the last day of the fiscal year preceding the date of grant. The First Option vests monthly over approximately three years from the grant date subject

Segments Information

Segments Information
	12 Months Ended Dec. 31, 2009 USD / shares
Segments Information [Abstract]
Segments Information	Note11. Segment Information The Companys chief operating decision maker (CODM) allocates resources and assesses performance based on financial information by the Companys business groups. The Companys operations are organized into two reportable segments: Infrastructure and SLT. The Infrastructure segment includes products from the E-, M-, MX-, and T-series router product families, EX-series switching products, as well as the circuit-to-packet products. The SLT segment consists primarily of Firewall virtual private network (Firewall) systems and appliances, SRX services gateways, secure socket layer (SSL) virtual private network (VPN) appliances, intrusion detection and prevention (IDP) appliances, the J-series router product family and wide area network (WAN) optimization platforms. The primary financial measure used by the CODM in assessing performance of the segments is segment operating income, which includes certain cost of revenues, RD expenses, sales and marketing expenses, and general and administrative expenses. The CODM does not allocate certain miscellaneous expenses to its segments even though such expenses are included in the Companys management operating income. For arrangements with both Infrastructure and SLT products and services, revenue is attributed to the segment based on the underlying purchase order, contract, or sell-through report. Direct costs and operating expenses, such as standard costs, research and development (RD), and product marketing expenses, are generally applied to each segment. Indirect costs, such as manufacturing overhead and other cost of revenues, are allocated based on standard costs. Indirect operating expenses, such as sales, marketing, business development, and general and administrative expenses are generally allocated to each segment based on factors including headcount, usage, and revenue. The CODM does not allocate stock-based compensation, amortization of purchased intangible assets, restructuring and impairment charges, gains or losses on equity investments, other net income and expense, income taxes, as well as certain other charges to the segments. The following table summarizes financial information for each segment used by the CODM (in millions): Years Ended December31, 2009 2008 2007 Net revenues: Infrastructure: Product $ 1,959.2 $ 2,301.9 $ 1,753.2 Service 482.4 424.0 320.1 Total Infrastructure revenues 2,441.6 2,725.9 2,073.3 Service Layer Technologies: Product 608.8 609.1 573.8 Service 265.5 237.4 189.0 Total Service Layer Technologies revenues 874.3 846.5 762.8 Total net revenues 3,315.9 3,572.4 2,836.1 Operating income: Infrastruc

Income Taxes

Income Taxes
	12 Months Ended Dec. 31, 2009 USD / shares
Income Taxes [Abstract]
Income Taxes	Note12. Income Taxes The components of income (loss) before the provision for income taxes and noncontrolling interest are summarized as follows (in millions): Years Ended December31, 2009 2008 2007 Domestic $ 50.1 $ 363.7 $ 225.9 Foreign 262.0 365.2 284.7 Total income before provision for income taxes and noncontrolling interest $ 312.1 $ 728.9 $ 510.6 The provision for income taxes is summarized as follows (in millions): Years Ended December31, 2009 2008 2007 Current Provision: Federal $ 123.8 $ 96.6 $ 52.9 State 21.4 35.8 15.2 Foreign 43.5 39.3 48.0 Total current provision 188.7 171.7 116.1 Deferred expense/(benefit): Federal (42.7 ) 21.4 (0.5 ) State 55.7 (4.4 ) (5.7 ) Foreign (5.9 ) (2.7 ) (3.6 ) Total deferred expense/(benefit) 7.1 14.3 (9.8 ) Income tax benefits attributable to employee stock plan activity 1.0 31.2 43.5 Total provision for income taxes $ 196.8 $ 217.2 $ 149.8 The provision for income taxes differs from the amount computed by applying the federal statutory rate to income (loss) before provision for income taxes as follows (in millions): Years Ended December31, 2009 2008 2007 Expected provision at 35% rate $ 109.2 $ 255.1 $ 178.7 State taxes, net of federal benefit (1.6 ) 16.6 6.5 Foreign income at different tax rates (33.8 ) (51.2 ) (21.7 ) RD credits (14.4 ) (12.1 ) (18.6 ) Stock-based compensation 62.1 2.4 1.2 Temporary differences not currently benefited 72.8 Other 2.5 6.4 3.7 Total provision for income taxes $ 196.8 $ 217.2 $ 149.8 Deferred income taxes reflect the net tax effects of tax carry-forward items and 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 Companys deferred tax assets and liabilities are as follows (in millions): As of December31, 2009 2008 Deferred tax assets:

Commitments and Contingencies

Commitments and Contingencies
	12 Months Ended Dec. 31, 2009 USD / shares
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note13. Commitments and Contingencies Commitments The following table summarizes the Companys principal contractual obligations as of December31, 2009, (in millions): Total 2010 2011 2012 2013 2014 Thereafter Other Operating leases $ 303.9 $ 51.6 $ 42.3 $ 36.7 $ 27.6 $ 23.8 $ 121.9 $ Sublease rental income (0.6 ) (0.6 ) Purchase commitments 139.5 139.5 Tax liabilities 177.0 1.5 175.5 Other contractual obligations 39.3 18.3 13.5 5.6 1.9 Total $ 659.1 $ 210.3 $ 55.8 $ 42.3 $ 29.5 $ 23.8 $ 121.9 $ 175.5 Operating Leases The Company leases its facilities under operating leases that expire at various times, the longest of which expires in November 2022. Future minimum payments under the non-cancelable operating leases, net of committed sublease income, totaled $303.3million as of December31, 2009. Rent expense for 2009, 2008, and 2007 was approximately $56.6million, $58.0million, and $48.7million, respectively. In October 2009, the Company amended three existing leases for the Companys corporate headquarters facilities in Sunnyvale, California. Each lease was amended to: (i)extend the underlying lease term, and (ii)establish new monthly base rent payments for periods after November1, 2009. The new monthly base rent payments represent a significant reduction in base rent that would have been payable for the previously remaining terms of each of the underlying leases. Purchase Commitments In order to reduce manufacturing lead times and ensure adequate component supply, contract manufacturers utilized by the Company place non-cancelable, non-returnable (NCNR) orders for components based on the Companys build forecasts. As of December31, 2009, there were NCNR component orders placed by the contract manufacturers with a value of $139.5million. The contract manufacturers use the components to build products based on the Companys forecasts and on purchase orders that the Company has received from customers. Generally, the Company does not own the components and title to the products transfers from the contract manufacturers to the Company and immediately to the Companys customers upon delivery at a designated shipment location. If the components remain unused or the products remain unsold for specified periods, the Company may incur carrying charges or obsolete materials charges for components that the contract manufacturers purch

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)
	12 Months Ended Dec. 31, 2009 USD / shares
Selected Quarterly Financial Data [Abstract]
Selected Quarterly Financial Data	Note14. Selected Quarterly Financial Data (Unaudited) The table below sets forth selected unaudited financial data for each quarter of the two years ended December31, 2009, (in millions, except per share amounts): First Second Third Fourth Year Ended December31, 2009 Quarter Quarter Quarter Quarter Net revenues: Product $ 587.8 $ 607.0 $ 634.1 $ 739.1 Service 176.3 179.4 189.8 202.4 Total net revenues 764.1 786.4 823.9 941.5 Cost of revenues: Cost of revenues Product 193.0 207.6 206.3 234.8 Cost of revenues Service 75.4 78.4 80.4 81.9 Total cost of revenues 268.4 286.0 286.7 316.7 Gross margin 495.7 500.4 537.2 624.8 Operating expenses: Research and development 185.4 183.9 185.2 187.2 Sales and marketing 181.2 170.6 177.3 204.9 General and administrative 39.2 39.2 39.9 41.2 Amortization of purchased intangibles 4.4 3.5 1.3 1.2 Litigation settlement charges 1.0 181.3 Restructuring charges 4.3 7.5 4.5 3.2 Total operating expenses 414.5 404.7 409.2 619.0 Operating income 81.2 95.7 128.0 5.8 Other income and expense, net 0.3 1.3 1.7 (1.9 ) Income before income taxes and noncontrolling interest 81.5 97.0 129.7 3.9 Provision for income taxes 85.9 82.2 45.9 (17.2 ) Consolidated (loss) net income (4.4 ) 14.8 83.8 21.1 Plus: Net loss attributable to noncontrolling interest 1.8 Net (loss) income attributable to Juniper Networks $ (4.4 ) $ 14.8 $ 83.8 $ 22.9 Net (loss) income per share attributable to Juniper Networks common stockholders: Basic (loss) income per share $ (0.01 ) $ 0.03 $ 0.16 $ 0.04 Diluted (loss) income per share $ (0.01 ) $ 0.0

Joint Venture

Joint Venture
	12 Months Ended Dec. 31, 2009 USD / shares
Joint Venture [Abstract]
Joint Venture	Note15. Joint Venture In 2009, the Company entered into an agreement to form a joint venture to provide a combined carrier Ethernet-based solution with NSN. At inception, the Company contributed $6.6million for a 60percent interest in the joint venture. Both NSN and Juniper Networks are entitled to appoint two board members to the Board of the joint venture. The Board shall consist of four board members at all times. Given the Companys majority ownership interest in the joint venture, the ventures financial results have been consolidated with the accounts of the Company, and a noncontrolling interest has been recorded to reflect the noncontrolling investors interest in the ventures results. All intercompany transactions have been eliminated, with the exception of the noncontrolling interest.

Subsequent Event

Subsequent Event
	12 Months Ended Dec. 31, 2009 USD / shares
Subsequent Event [Abstract]
Subsequent Event	Note16. Subsequent Event Stock Repurchases Subsequent to December31, 2009, through the filing of this report, the Company repurchased 2.1million shares of its common stock, for $55.3million at an average purchase price of $26.28 per share, under its 2008 Stock Repurchase Program. As of the filing of this Annual Report on Form10-K, the Companys 2008 Stock Repurchase Programs had remaining authorized funds of $263.3million. Purchases under this program are subject to a review of the circumstances in place at the time. Acquisitions under the Companys share repurchase program may be made from time to time as permitted by securities laws and other legal requirements. This program may be discontinued at any time. In February 2010, the Companys Board approved a new stock repurchase program which authorized the company to repurchase up to $1.0billion of its common stock. This new authorization is in addition to the Companys 2008 Stock Purchase Program. Share repurchases under the Company's stock repurchase programs will be subject to a review of the circumstances in place at the time and will be made from time to time in private transactions or open market purchases as permitted by securities laws and other legal requirements. These programs may be discontinued at any time.

Valuation and Qualifying Accoun

Valuation and Qualifying Account
	12 Months Ended Dec. 31, 2009 USD / shares
Valuation and Qualifying Account [Abstract]
Valuation and Qualifying Account	US GAAP element Schedule Of Valuation And Qualifying Accounts Disclosure Juniper Networks, Inc. ScheduleII Valuation and Qualifying Account Years Ended December31, 2009, 2008, and 2007 Charged to Balance at (Reversed from) Recoveries Beginning of Costs and (Deductions), Balance at Year Expenses Net End of Year (In millions) Year ended December31, 2009 Allowance for doubtful accounts $ 9.7 $ (0.6 ) $ $ 9.1 Sales returns reserve $ 36.8 $ 84.1 $ (75.3 ) $ 45.6 Year ended December31, 2008 Allowance for doubtful accounts $ 8.3 $ 1.7 $ (0.3 ) $ 9.7 Sales returns reserve $ 25.1 $ 89.0 $ (77.3 ) $ 36.8 Year ended December31, 2007 Allowance for doubtful accounts $ 7.3 $ 0.4 $ 0.6 $ 8.3 Sales returns reserve $ 15.0 $ 56.8 $ (46.7 ) $ 25.1