Nominal or face amount used to calculate payment on derivative.

No definition available.

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

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
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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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

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- Details

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Data Type:	na
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- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
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Fair Value Measurements - Foreign Currency Forward Contracts (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Net revenues	$ 1,954	$ 1,282	$ 5,674	$ 4,503
Buy USD, Sell Euro \| Designated as Hedging Instrument \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Notional amount	608		608		$ 350
Fair value gain (loss)	(18)		(18)		(2)
Foreign currency forward contracts \| Cash Flow Hedging \| Reclassification out of Accumulated Other Comprehensive Income
Derivatives, Fair Value [Line Items]
Net revenues	(5)	$ 7	$ 7	$ 24
Foreign currency forward contracts \| Designated as Hedging Instrument \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Contract maturity (or less)			13 months
Buy USD, Sell GBP \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	61		$ 61		25
Fair value gain (loss)	$ (1)		$ (1)		$ (2)