Cash received from financing provider that has not been recognized as revenue.

No definition available.

Name:	jnpr_CashReceivedFromFinancingProviderThatHasNotBeenRecognizedAsRevenue
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Debt Instrument, Redemption, Discount Rate, Basis Spread on Variable Rate

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Redemption, Redemption Period

+ References

No definition available.

+ Details

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- Definition

Financing arrangements.

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Additional Borrowing Capacity

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Maximum term for guarantees relating to third-party financing arrangements

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Receivables from sale of receivables.

+ References

No definition available.

+ Details

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Namespace Prefix:	jnpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Repurchase Price Percentage Related to Change of Control

+ References

No definition available.

+ Details

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Namespace Prefix:	jnpr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Sale of trade receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	jnpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow associated with the proceeds from sale and collection of receivables during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=jnpr_FinancingguaranteewithrecourseMember
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- Details

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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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- Details

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- Details

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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_EurodollarMember
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Data Type:	na
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- Details

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- Details

Name:	us-gaap_DebtInstrumentAxis=jnpr_FixedRateNoteDue2025Member
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- Details

Name:	us-gaap_DebtInstrumentAxis=jnpr_FixedRateNoteDue2024Member
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Name:	us-gaap_DebtInstrumentAxis=jnpr_FixedRateNoteDue2016Member
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Name:	us-gaap_DebtInstrumentAxis=jnpr_OtherFixedRateNotesMember
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Debt and Financing (Details) - USD ($)		12 Months Ended
Debt and Financing (Details) - USD ($)	Jun. 27, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2011
Debt Instrument [Line Items]
Repurchase price percentage related to change in control		101.00%
Financing Arrangements [Abstract]
Sale of receivables		$ 72,500,000	$ 440,300,000	$ 898,400,000
Proceeds from sale and collection of receivables		99,300,000	602,100,000	$ 843,900,000
Receivables from sale of receivables		$ 1,200,000	28,000,000
Maximum term for guarantees relating to third-party financing arrangements		3 years
Cash received from financing provider that has not been recognized as revenue		$ 1,400,000	$ 45,300,000
Financing guarantee with recourse [Member]
Financing Arrangements [Abstract]
Guarantor obligations, current carrying value		$ 9,900,000
Minimum [Member]
Financing Arrangements [Abstract]
Number of days due from receivable		30 days
Maximum [Member]
Financing Arrangements [Abstract]
Number of days due from receivable		90 days
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 500,000,000.0
Additional borrowing capacity	$ 200,000,000
Revolving Credit Facility [Member] \| Federal Funds Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility [Member] \| ICE Benchmark Administration Settlement Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Revolving Credit Facility [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Revolving Credit Facility [Member] \| Minimum [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.90%
Revolving Credit Facility [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility [Member] \| Maximum [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Fixed rate note due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption, Redemption Period		1 month
Long-term debt		$ 300,000,000			$ 300,000,000
Stated interest rate		3.30%			3.30%
Fixed Rate Note Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption, Redemption Period		3 months
Long-term debt		$ 300,000,000			$ 300,000,000
Stated interest rate		4.35%			4.35%
Fixed Rate Note Due 2024 [Member]
Debt Instrument [Line Items]
Long-term debt		$ 350,000,000				$ 350,000,000
Stated interest rate		4.50%				4.50%
Fixed Rate Note Due 2016 [Member]
Debt Instrument [Line Items]
Long-term debt		$ 300,000,000					$ 300,000,000
Stated interest rate		3.10%					3.10%
Fixed Rate Note Due 2021 [Member]
Debt Instrument [Line Items]
Long-term debt		$ 300,000,000					$ 300,000,000
Stated interest rate		4.60%					4.60%
Fixed Rate Note Due 2041 [Member]
Debt Instrument [Line Items]
Long-term debt		$ 400,000,000					$ 400,000,000
Stated interest rate		5.95%					5.95%
Other Fixed Rate Notes [Member]
Financing Arrangements [Abstract]
Debt Instrument, Redemption Price, Percentage		100.00%
One Month Prior to Maturity [Member] \| Fixed rate note due 2020 [Member] \| Treasury Rate [Member]
Financing Arrangements [Abstract]
Debt Instrument, Redemption, Discount Rate, Basis Spread on Variable Rate		0.30%
One Month Prior to Maturity [Member] \| Fixed Rate Note Due 2025 [Member] \| Treasury Rate [Member]
Financing Arrangements [Abstract]
Debt Instrument, Redemption, Discount Rate, Basis Spread on Variable Rate		0.375%
One Month Prior to Maturity [Member] \| Fixed Rate Notes Due 2020 And 2025 [Member]
Financing Arrangements [Abstract]
Debt Instrument, Redemption Price, Percentage		100.00%
Any Time on or After May 15, 2020 [Member] \| Fixed rate note due 2020 [Member]
Financing Arrangements [Abstract]
Debt Instrument, Redemption Price, Percentage		100.00%
Any Time on or After March 15, 2025 [Member] \| Fixed rate note due 2020 [Member]
Financing Arrangements [Abstract]
Debt Instrument, Redemption Price, Percentage		100.00%