Income Taxes	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company accounts for its provision for income taxes in accordance with ASC 740, Income Taxes, which requires an estimate of the annual effective tax rate for the full year to be applied to the interim period, taking into account year-to-date amounts and projected results for the full year. The provision for income taxes represents federal, foreign, state, and local income taxes. Our effective tax rate differs from the statutory U.S. income tax rate due to the effect of state and local income taxes, tax rates in foreign jurisdictions, and certain nondeductible expenses. Our effective tax rate could fluctuate significantly from quarter to quarter based on recurring and nonrecurring factors including, but not limited to: variations in the estimated and actual level of pre-tax income or loss by jurisdiction; changes in the mix of income by tax jurisdiction (as taxes are levied at relatively lower statutory rates in foreign regions and relatively higher statutory rates in the U.S.); research and development credits; changes in enacted tax laws and regulations, rulings, and interpretations thereof, including with respect to tax credits and state and local income taxes; developments in tax audits and other matters; recognition of excess tax benefits and tax deficiencies from share-based payments; and certain nondeductible expenses. Changes in judgment from the evaluation of new information resulting in the recognition, derecognition, or remeasurement of a tax position taken in a prior annual period are recognized separately in the quarter of the change. The income tax expense of $32 million for the three months ended September 30, 2017, reflects an effective tax rate of 15%, which is higher than the effective tax rate of 14% for the three months ended September 30, 2016. The increase is due to lower discrete tax benefits recognized in the current quarter, partially offset by higher excess tax benefits from share-based payments. The income tax expense of $109 million for the nine months ended September 30, 2017, reflects an effective tax rate of 11%, which is lower than the effective tax rate of 12% for the nine months ended September 30, 2016. The decrease is due to higher excess tax benefits from share-based payments in the current period, partially offset by lower discrete tax benefits, primarily related to an audit settlement recognized in the prior period. The effective tax rate of 15% and 11% for the three and nine months ended September 30, 2017, respectively, is lower than the U.S. statutory rate of 35%, primarily due to foreign earnings taxed at lower statutory rates, the recognition of excess tax benefits from share-based payments, and the recognition of federal and California research and development credits, partially offset by an increase of reserves for uncertain tax positions. The Internal Revenue Service (“IRS”) is currently examining Activision Blizzard’s federal tax returns for the 2009, 2010, and 2011 tax years. During the second quarter of 2015, the Company transitioned the review of its transfer pricing methodology from the advanced pricing agreement review process to the IRS examination team. Their review could result in a different allocation of profits and losses under the Company’s transfer pricing agreements. Such allocation could have a positive or negative impact on our provision for uncertain tax positions for the period in which such a determination is reached and the relevant periods thereafter. The Company also has several state level and non-U.S. audits pending. As part of purchase price accounting for the King Acquisition, the Company assumed $74 million of uncertain tax positions, primarily related to the transfer pricing on King tax years occurring prior to the King Acquisition. The Company is currently in negotiations with the relevant jurisdictions and taxing authorities with respect to King’s transfer pricing, which could result in a different allocation of profits and losses between the relevant jurisdictions. Vivendi Games’ results for the period from January 1, 2008 through July 9, 2008, are included in the consolidated federal and certain foreign state and local income tax returns filed by Vivendi or its affiliates, while Vivendi Games’ results for the period from July 10, 2008 through December 31, 2008, are included in the consolidated federal and certain foreign, state and local income tax returns filed by Activision Blizzard. IRS Appeals proceedings concerning Vivendi Games’ tax return for the 2008 tax year were concluded during July 2016, but that year remains open to examination by other major taxing authorities. The resolution of the 2008 IRS Appeals process did not have a material impact to the Company’s condensed consolidated financial statements. Certain of our subsidiaries are under examination or investigation or may be subject to examination or investigation by tax authorities in various jurisdictions, including France. These proceedings may lead to adjustments or proposed adjustments to our taxes or provisions for uncertain tax positions. Such proceedings may have a material adverse effect on the Company’s consolidated financial position, liquidity, or results of operations in the period or periods in which the matters are resolved or in which appropriate tax provisions are taken into account in our financial statements. If we were to receive a materially adverse assessment from a taxing jurisdiction, we would plan to vigorously contest it and consider all of our options, including the pursuit of judicial remedies. The final resolution of the Company’s global tax disputes is uncertain. There is significant judgment required in the analysis of disputes, including the probability determination and estimation of the potential exposure. Based on current information, in the opinion of the Company’s management, the ultimate resolution of these matters is not expected to have a material adverse effect on the Company’s consolidated financial position, liquidity, or results of operations, except as noted above.

Income Taxes

The Company accounts for its provision for income taxes in accordance with ASC 740, Income Taxes, which requires an estimate of the annual effective tax rate for the full year to be applied to the interim period, taking into account year-to-date amounts and projected results for the full year. The provision for income taxes represents federal, foreign, state, and local income taxes. Our effective tax rate differs from the statutory U.S. income tax rate due to the effect of state and local income taxes, tax rates in foreign jurisdictions, and certain nondeductible expenses. Our effective tax rate could fluctuate significantly from quarter to quarter based on recurring and nonrecurring factors including, but not limited to: variations in the estimated and actual level of pre-tax income or loss by jurisdiction; changes in the mix of income by tax jurisdiction (as taxes are levied at relatively lower statutory rates in foreign regions and relatively higher statutory rates in the U.S.); research and development credits; changes in enacted tax laws and regulations, rulings, and interpretations thereof, including with respect to tax credits and state and local income taxes; developments in tax audits and other matters; recognition of excess tax benefits and tax deficiencies from share-based payments; and certain nondeductible expenses. Changes in judgment from the evaluation of new information resulting in the recognition, derecognition, or remeasurement of a tax position taken in a prior annual period are recognized separately in the quarter of the change.

The income tax expense of $32 million for the three months ended September 30, 2017, reflects an effective tax rate of 15%, which is higher than the effective tax rate of 14% for the three months ended September 30, 2016. The increase is due to lower discrete tax benefits recognized in the current quarter, partially offset by higher excess tax benefits from share-based payments.

The income tax expense of $109 million for the nine months ended September 30, 2017, reflects an effective tax rate of 11%, which is lower than the effective tax rate of 12% for the nine months ended September 30, 2016. The decrease is due to higher excess tax benefits from share-based payments in the current period, partially offset by lower discrete tax benefits, primarily related to an audit settlement recognized in the prior period.

The effective tax rate of 15% and 11% for the three and nine months ended September 30, 2017, respectively, is lower than the U.S. statutory rate of 35%, primarily due to foreign earnings taxed at lower statutory rates, the recognition of excess tax benefits from share-based payments, and the recognition of federal and California research and development credits, partially offset by an increase of reserves for uncertain tax positions.

The Internal Revenue Service (“IRS”) is currently examining Activision Blizzard’s federal tax returns for the 2009, 2010, and 2011 tax years. During the second quarter of 2015, the Company transitioned the review of its transfer pricing methodology from the advanced pricing agreement review process to the IRS examination team. Their review could result in a different allocation of profits and losses under the Company’s transfer pricing agreements. Such allocation could have a positive or negative impact on our provision for uncertain tax positions for the period in which such a determination is reached and the relevant periods thereafter. The Company also has several state level and non-U.S. audits pending.

As part of purchase price accounting for the King Acquisition, the Company assumed $74 million of uncertain tax positions, primarily related to the transfer pricing on King tax years occurring prior to the King Acquisition. The Company is currently in negotiations with the relevant jurisdictions and taxing authorities with respect to King’s transfer pricing, which could result in a different allocation of profits and losses between the relevant jurisdictions.

Vivendi Games’ results for the period from January 1, 2008 through July 9, 2008, are included in the consolidated federal and certain foreign state and local income tax returns filed by Vivendi or its affiliates, while Vivendi Games’ results for the period from July 10, 2008 through December 31, 2008, are included in the consolidated federal and certain foreign, state and local income tax returns filed by Activision Blizzard. IRS Appeals proceedings concerning Vivendi Games’ tax return for the 2008 tax year were concluded during July 2016, but that year remains open to examination by other major taxing authorities. The resolution of the 2008 IRS Appeals process did not have a material impact to the Company’s condensed consolidated financial statements.

Certain of our subsidiaries are under examination or investigation or may be subject to examination or investigation by tax authorities in various jurisdictions, including France. These proceedings may lead to adjustments or proposed adjustments to our taxes or provisions for uncertain tax positions. Such proceedings may have a material adverse effect on the Company’s consolidated financial position, liquidity, or results of operations in the period or periods in which the matters are resolved or in which appropriate tax provisions are taken into account in our financial statements. If we were to receive a materially adverse assessment from a taxing jurisdiction, we would plan to vigorously contest it and consider all of our options, including the pursuit of judicial remedies.

The final resolution of the Company’s global tax disputes is uncertain. There is significant judgment required in the analysis of disputes, including the probability determination and estimation of the potential exposure. Based on current information, in the opinion of the Company’s management, the ultimate resolution of these matters is not expected to have a material adverse effect on the Company’s consolidated financial position, liquidity, or results of operations, except as noted above.