Commitments and Contingencies	3 Months Ended
Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Commitments Operating Leases The Company leases its facilities and certain equipment under non-cancelable operating leases that expire at various dates through November 30, 2022. Certain leases require the Company to pay variable costs such as taxes, maintenance, and insurance and include renewal options and escalation clauses. Future minimum payments under the non-cancelable operating leases totaled $221.3 million as of March 31, 2014. Rent expense was $13.0 million and $13.7 million for the three months ended March 31, 2014 and March 31, 2013, respectively. Purchase Commitments with Contract Manufacturers and Suppliers In order to reduce manufacturing lead times and ensure adequate component supply, the Company enters into agreements with contract manufacturers and certain suppliers to procure inventory based on the Company's requirements. A significant portion of the Company's purchase commitments arising from these agreements consists of firm and non-cancelable commitments. These purchase commitments totaled $489.7 million as of March 31, 2014. The Company establishes a liability in connection with purchase commitments related to quantities in excess of its demand forecasts or obsolete materials charges for components purchased by the contract manufacturers based on the Company’s demand forecast or customer orders. As of March 31, 2014, the Company accrued $20.5 million based on its estimate of such charges. Long-Term Debt and Interest Payment on Long-Term Debt As of March 31, 2014, the Company held long-term debt consisting of senior notes with a carrying value of $1,348.9 million. Of these Notes, $300.0 million will mature in 2016 and bears interest at a fixed rate of 3.10%, $300.0 million will mature in 2021 and bears interest at a fixed rate of 4.60%, $350.0 million will mature in 2024 and bears interest at a fixed rate of 4.50%, and $400.0 million will mature in 2041 and bears interest at a fixed rate of 5.95%. Interest on the Notes is payable semiannually. See Note 10, Long-Term Debt and Financing, for further discussion of the Company's long-term debt. Other Contractual Obligations As of March 31, 2014, other contractual obligations primarily consisted of $71.6 million in indemnity-related and service related escrows, as required in connection with certain asset purchases and acquisitions completed between 2005 and 2014, campus build-out obligations of $13.9 million, and $7.8 million of agreements that are firm, non-cancelable and specify terms, including: fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of payment. Tax Liabilities As of March 31, 2014, the Company had $121.7 million included in long-term income taxes payable in the Condensed Consolidated Balance Sheets for unrecognized tax positions. At this time, the Company is unable to make a reasonably reliable estimate of the timing of payments related to this amount due to uncertainties in the timing of tax audit outcomes. Guarantees The Company enters into agreements with customers that contain indemnification provisions relating to potential situations where claims could be alleged that the Company’s products infringe the intellectual property rights of a third-party. The Company also has financial guarantees consisting of guarantees of product and service performance, guarantees related to third-party customer-financing arrangements, custom and duty guarantees, and standby letters of credit for certain lease facilities. As of March 31, 2014 and December 31, 2013, the Company had $28.7 million and $40.1 million, respectively, in financing arrangements, bank guarantees, and standby letters of credit related to these financial guarantees, of which $21.9 million in financing guarantees was recorded in other accrued liabilities and other long-term liabilities in the Condensed Consolidated Balance Sheets as of March 31, 2014. See Note 10, Long-Term Debt and Financing, for further discussion of the Company's third-party customer financing arrangements that contain guarantee provisions. Legal Proceedings The Company is involved in disputes, litigation, and other legal actions, including, but not limited to, the matters described below. The Company is aggressively defending its current litigation matters. There are many uncertainties associated with any litigation and these actions or other third-party claims against the Company may cause the Company to incur costly litigation and/or substantial settlement charges. In addition, the resolution of any intellectual property litigation may require the Company to make royalty payments, which could adversely affect gross margins in future periods. If any of those events were to occur, the Company's business, financial condition, results of operations, and cash flows could be adversely affected. The actual liability in any such matters may be materially different from the Company's estimates, if any, which could result in the need to adjust the liability and record additional expenses. Unless otherwise noted below, during the period presented, we have not recorded any accrual for loss contingencies associated with such legal proceedings; determined that an unfavorable outcome is probable or reasonably possible; or determined that the amount or range of any possible loss is reasonably estimable. 2013 Federal Securities Class Action On August 12, 2013, a purported securities class action lawsuit, captioned Warren Avery v. Juniper Networks, Inc., et al., Case No. 13-cv-3733-WHO, was filed in the United States District Court for the Northern District of California naming the Company and certain of its officers and directors as defendants. The complaint alleged that the defendants made false and misleading statements regarding the Company's revenues, business practices, and internal controls. The complaint purported to assert claims for violations of Sections 10 (b) and 20(a) of the Securities Exchange Act of 1934 and SEC Rule 10b-5 on behalf of those who purchased Juniper Networks' securities between April 24, 2012 and August 8, 2013, inclusive. Plaintiff sought an unspecified amount of monetary damages on behalf of the purported class. On November 12, 2013, the court issued an order appointing Warren Avery as lead plaintiff. On January 9, 2014, lead plaintiff filed a notice of voluntary dismissal of the action without prejudice. On January, 23, 2014, the court entered an order of dismissal without prejudice. 2013 Shareholder Derivative Lawsuit On August 28, 2013, a purported shareholder derivative action captioned Washtenaw County Employees’ Retirement System v. Kriens, et al., Case No. 1-13-CV-252083, was filed in the Superior Court of the State of California, County of Santa Clara, naming certain of the Company's officers and directors as defendants. On October 17, 2013, the action was removed to the United States District Court for the Northern District of California, and is now Case No. 13-cv-04829-WHO. The Company is named only as a nominal defendant in the action. The complaint alleges that the defendants failed to implement adequate internal controls and compliance programs to prevent violations of the Foreign Corrupt Practices Act. The complaint purports to assert claims against the defendants for breach of fiduciary duties, abuse of control, and waste of corporate assets. The complaint seeks, among other relief, damages in an unspecified amount, restitution, and attorneys' fees and costs. On January 22, 2014, the Company filed a motion to dismiss the action. On March 6, 2014, plaintiff filed a stipulation of voluntary dismissal, and on March 12, 2014, the Court entered an order of dismissal without prejudice. Investigations The U.S. Securities and Exchange Commission and the U.S. Department of Justice are conducting investigations into possible violations by the Company of the U.S. Foreign Corrupt Practices Act. The Company is cooperating with these agencies regarding these matters. The Company is unable to predict the duration, scope or outcome of these investigations.

Commitments and Contingencies

Commitments

Operating Leases

The Company leases its facilities and certain equipment under non-cancelable operating leases that expire at various dates through November 30, 2022. Certain leases require the Company to pay variable costs such as taxes, maintenance, and insurance and include renewal options and escalation clauses. Future minimum payments under the non-cancelable operating leases totaled $221.3 million as of March 31, 2014. Rent expense was $13.0 million and $13.7 million for the three months ended March 31, 2014 and March 31, 2013, respectively.

Purchase Commitments with Contract Manufacturers and Suppliers

In order to reduce manufacturing lead times and ensure adequate component supply, the Company enters into agreements with contract manufacturers and certain suppliers to procure inventory based on the Company's requirements. A significant portion of the Company's purchase commitments arising from these agreements consists of firm and non-cancelable commitments. These purchase commitments totaled $489.7 million as of March 31, 2014.

The Company establishes a liability in connection with purchase commitments related to quantities in excess of its demand forecasts or obsolete materials charges for components purchased by the contract manufacturers based on the Company’s demand forecast or customer orders. As of March 31, 2014, the Company accrued $20.5 million based on its estimate of such charges.

Long-Term Debt and Interest Payment on Long-Term Debt

As of March 31, 2014, the Company held long-term debt consisting of senior notes with a carrying value of $1,348.9 million. Of these Notes, $300.0 million will mature in 2016 and bears interest at a fixed rate of 3.10%, $300.0 million will mature in 2021 and bears interest at a fixed rate of 4.60%, $350.0 million will mature in 2024 and bears interest at a fixed rate of 4.50%, and $400.0 million will mature in 2041 and bears interest at a fixed rate of 5.95%. Interest on the Notes is payable semiannually. See Note 10, Long-Term Debt and Financing, for further discussion of the Company's long-term debt.

Other Contractual Obligations

As of March 31, 2014, other contractual obligations primarily consisted of $71.6 million in indemnity-related and service related escrows, as required in connection with certain asset purchases and acquisitions completed between 2005 and 2014, campus build-out obligations of $13.9 million, and $7.8 million of agreements that are firm, non-cancelable and specify terms, including: fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of payment.

Tax Liabilities

As of March 31, 2014, the Company had $121.7 million included in long-term income taxes payable in the Condensed Consolidated Balance Sheets for unrecognized tax positions. At this time, the Company is unable to make a reasonably reliable estimate of the timing of payments related to this amount due to uncertainties in the timing of tax audit outcomes.

Guarantees

The Company enters into agreements with customers that contain indemnification provisions relating to potential situations where claims could be alleged that the Company’s products infringe the intellectual property rights of a third-party. The Company also has financial guarantees consisting of guarantees of product and service performance, guarantees related to third-party customer-financing arrangements, custom and duty guarantees, and standby letters of credit for certain lease facilities. As of March 31, 2014 and December 31, 2013, the Company had $28.7 million and $40.1 million, respectively, in financing arrangements, bank guarantees, and standby letters of credit related to these financial guarantees, of which $21.9 million in financing guarantees was recorded in other accrued liabilities and other long-term liabilities in the Condensed Consolidated Balance Sheets as of March 31, 2014. See Note 10, Long-Term Debt and Financing, for further discussion of the Company's third-party customer financing arrangements that contain guarantee provisions.

Legal Proceedings

The Company is involved in disputes, litigation, and other legal actions, including, but not limited to, the matters described below. The Company is aggressively defending its current litigation matters. There are many uncertainties associated with any litigation and these actions or other third-party claims against the Company may cause the Company to incur costly litigation and/or substantial settlement charges. In addition, the resolution of any intellectual property litigation may require the Company to make royalty payments, which could adversely affect gross margins in future periods. If any of those events were to occur, the Company's business, financial condition, results of operations, and cash flows could be adversely affected. The actual liability in any such matters may be materially different from the Company's estimates, if any, which could result in the need to adjust the liability and

record additional expenses. Unless otherwise noted below, during the period presented, we have not recorded any accrual for loss contingencies associated with such legal proceedings; determined that an unfavorable outcome is probable or reasonably possible; or determined that the amount or range of any possible loss is reasonably estimable.

2013 Federal Securities Class Action

On August 12, 2013, a purported securities class action lawsuit, captioned Warren Avery v. Juniper Networks, Inc., et al., Case No. 13-cv-3733-WHO, was filed in the United States District Court for the Northern District of California naming the Company and certain of its officers and directors as defendants. The complaint alleged that the defendants made false and misleading statements regarding the Company's revenues, business practices, and internal controls. The complaint purported to assert claims for violations of Sections 10 (b) and 20(a) of the Securities Exchange Act of 1934 and SEC Rule 10b-5 on behalf of those who purchased Juniper Networks' securities between April 24, 2012 and August 8, 2013, inclusive. Plaintiff sought an unspecified amount of monetary damages on behalf of the purported class. On November 12, 2013, the court issued an order appointing Warren Avery as lead plaintiff. On January 9, 2014, lead plaintiff filed a notice of voluntary dismissal of the action without prejudice. On January, 23, 2014, the court entered an order of dismissal without prejudice.

2013 Shareholder Derivative Lawsuit

On August 28, 2013, a purported shareholder derivative action captioned Washtenaw County Employees’ Retirement System v. Kriens, et al., Case No. 1-13-CV-252083, was filed in the Superior Court of the State of California, County of Santa Clara, naming certain of the Company's officers and directors as defendants. On October 17, 2013, the action was removed to the United States District Court for the Northern District of California, and is now Case No. 13-cv-04829-WHO. The Company is named only as a nominal defendant in the action. The complaint alleges that the defendants failed to implement adequate internal controls and compliance programs to prevent violations of the Foreign Corrupt Practices Act. The complaint purports to assert claims against the defendants for breach of fiduciary duties, abuse of control, and waste of corporate assets. The complaint seeks, among other relief, damages in an unspecified amount, restitution, and attorneys' fees and costs. On January 22, 2014, the Company filed a motion to dismiss the action. On March 6, 2014, plaintiff filed a stipulation of voluntary dismissal, and on March 12, 2014, the Court entered an order of dismissal without prejudice.

Investigations

The U.S. Securities and Exchange Commission and the U.S. Department of Justice are conducting investigations into possible violations by the Company of the U.S. Foreign Corrupt Practices Act. The Company is cooperating with these agencies regarding these matters. The Company is unable to predict the duration, scope or outcome of these investigations.