Amount of the fees associated with providing collateral for the credit facility.

No definition available.

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

- Definition

Amount of the fee for available but unused credit capacity under the credit facility.

+ 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 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Description of when the fee for available but unused credit capacity is required to be paid (for example, annually, quarterly, or monthly).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInitiationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of claims settled and dismissed during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility extended maturity month and year.

+ References

No definition available.

+ Details

Name:	znga_LineOfCreditFacilityExtendedMaturityMonthAndYear
Namespace Prefix:	znga_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility revolving credit amount withdrawn.

+ References

No definition available.

+ Details

Name:	znga_LineOfCreditFacilityRevolvingCreditAmountWithdrawn
Namespace Prefix:	znga_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_StatementGeographicalAxis=stpr_DE
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=znga_CaseOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=znga_CaseTwoMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=znga_SanFranciscoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
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- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_StatementGeographicalAxis=znga_NorthernCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=znga_CaseEightMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_CreditFacilityAxis=znga_AmendedCreditFacilityMember
Namespace Prefix:
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Commitments and Contingencies - Additional Information (Detail)										1 Months Ended	9 Months Ended	38 Months Ended
	Aug. 04, 2015 USD ($)	Apr. 02, 2014 Cases	Apr. 04, 2013 Cases	Mar. 11, 2013 Cases	Nov. 19, 2012 Cases	Aug. 16, 2012 Cases	Aug. 03, 2012 Cases	Aug. 01, 2012 Cases	Jul. 30, 2012 Cases	Jun. 30, 2013 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($) Cases
Loss Contingencies [Line Items]
Line of credit facility, initiation date											Jul. 31, 2011
Line of credit facility maximum borrowing capacity \| $										$ 1,000,000,000
Line of credit facility commitment fee amount \| $										$ 600,000
Amount drawn down under credit facility \| $											$ 0	$ 0
Litigation settlement \| $	$ 23,000,000
Delaware [Member]
Loss Contingencies [Line Items]
Claims filed				1
Claims settled					1
Case one [Member] \| California [Member]
Loss Contingencies [Line Items]
Claims filed									1
Lee v. Pincus [Member] \| Delaware [Member]
Loss Contingencies [Line Items]
Claims filed			1
Reyes v. Zynga Inc. [Member] \| San Francisco [Member]
Loss Contingencies [Line Items]
Claims filed								1
Stockholder Derivative Lawsuits [Member]
Loss Contingencies [Line Items]
Claims filed												9
Zynga Shareholder Derivative Litigation [Member] \| San Francisco [Member]
Loss Contingencies [Line Items]
Claims filed							3
Zynga Inc. Derivative Litigation [Member] \| Northern California [Member]
Loss Contingencies [Line Items]
Claims filed						4
Sandys v. Pincus [Member] \| Delaware [Member]
Loss Contingencies [Line Items]
Claims filed		1
Amended Credit Facility [Member]
Loss Contingencies [Line Items]
Line of credit facility, extended maturity										2018-06
Line of credit facility maximum borrowing capacity \| $										$ 200,000,000
Line of credit facility additional up-front fees \| $										300,000
Line of credit facility frequency of commitment fee payment											Quarterly
Line of credit facility commitment fee amount \| $										$ 100,000
Line of credit facility, interest rate description											The interest rate for the amended credit facility is determined based on a formula using certain market rates, as described in the amended credit agreement.