The total amount of letters of credit that can be issued, subject to the availability of the revolving credit facility.

No definition available.

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Balance Type:	credit
Period Type:	instant

- Definition

Base Rate Margin for debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	atvi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Subsequent maximum end of range for Consolidated Total Net Debt Ratio financial covenant for our long term debt.

+ References

No definition available.

+ Details

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

- Definition

Variable Rate Interest Floor.

+ References

No definition available.

+ Details

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Namespace Prefix:	atvi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of authorized repayments of our existing outstanding debt.

+ References

No definition available.

+ Details

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

- Definition

Write Off Of Unamortized Discount (Premium) And Deferred Debt Issuance Costs as a result of extinguishment.

+ References

No definition available.

+ Details

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

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

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ 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 FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

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

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

+ Details

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

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

+ 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:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atvi_A2017TrancheATermLoanMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=atvi_A2016TrancheATermLoanMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=atvi_A2017TrancheATermLoanMember
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Balance Type:
Period Type:

- Details

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- Details

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- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
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- Details

Name:	us-gaap_CreditFacilityAxis=atvi_NewNotesMember
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Debt - Credit Facilities (Details) - USD ($)						12 Months Ended
Debt - Credit Facilities (Details) - USD ($)	Feb. 27, 2018	Feb. 01, 2018	May 26, 2017	Feb. 15, 2017	Feb. 03, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Gross Carrying Amount						$ 4,440,000,000	$ 4,940,000,000
Repayment of long-term debt						4,251,000,000	6,104,000,000	$ 250,000,000
Proceeds from new note issuances						3,741,000,000	6,878,000,000	$ 0
Revolver
Debt Instrument [Line Items]
Amount of letters of credit that can be issued under the Revolver					$ 50,000,000	50,000,000
Revolver
Debt Instrument [Line Items]
Maximum borrowing capacity							250,000,000
Line of Credit
Debt Instrument [Line Items]
Repayment of long-term debt						$ 1,700,000,000
Debt covenant, Consolidated Total Net Debt ratio, contingent maximum						350.00%
Line of Credit \| 2017 TLA
Debt Instrument [Line Items]
Gross Carrying Amount						$ 990,000,000
Line of Credit \| 2016 TLA
Debt Instrument [Line Items]
Gross Carrying Amount							$ 2,700,000,000
Repayment of long-term debt					139,000,000
Line of Credit \| Revolver
Debt Instrument [Line Items]
Amount drawn						$ 0
Line of Credit \| 2017 TLA
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 2,550,000,000
Repayment of long-term debt			$ 1,200,000,000	$ 361,000,000
Variable rate at end of period						2.73%
Write-off of unamortized discount and deferred financing costs			12,000,000
Line of Credit \| 2017 TLA \| Federal Funds Rate
Debt Instrument [Line Items]
Base rate margin						0.50%
Line of Credit \| 2017 TLA \| LIBOR
Debt Instrument [Line Items]
Base rate margin						1.00%
Variable rate interest floor						0.00%
Line of Credit \| 2017 TLA \| LIBOR \| Minimum
Debt Instrument [Line Items]
Applicable margin (as a percent)						1.125%
Line of Credit \| 2017 TLA \| LIBOR \| Maximum
Debt Instrument [Line Items]
Applicable margin (as a percent)						2.00%
Line of Credit \| 2017 TLA \| Base Rate
Debt Instrument [Line Items]
Variable rate interest floor						1.00%
Line of Credit \| 2017 TLA \| Base Rate \| Minimum
Debt Instrument [Line Items]
Applicable margin (as a percent)						0.125%
Line of Credit \| 2017 TLA \| Base Rate \| Maximum
Debt Instrument [Line Items]
Applicable margin (as a percent)						1.00%
Unsecured Debt \| 2022, 2027, and 2047 Notes
Debt Instrument [Line Items]
Proceeds from new note issuances			$ 1,200,000,000
Subsequent Events \| Line of Credit
Debt Instrument [Line Items]
Repayment of long-term debt	$ 0
Authorized debt repayments		$ 1,800,000,000