Goodwill (Details) $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 9,768
Other	(4)
Ending balance	9,764
Activision
Goodwill [Roll Forward]
Beginning balance	6,903
Other	(4)
Ending balance	6,899
Blizzard
Goodwill [Roll Forward]
Beginning balance	190
Other	0
Ending balance	190
Goodwill segment transfer	12
King
Goodwill [Roll Forward]
Beginning balance	2,675
Other	0
Ending balance	2,675
Other segments
Goodwill [Roll Forward]
Goodwill segment transfer	$ (12)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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- Definition

Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of transfers into (out of) an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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