Goodwill (Details) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Goodwill [Roll Forward]
Balance at December 31, 2018	$ 9,762
Other	1
March 31, 2019	9,763
Activision
Goodwill [Roll Forward]
Balance at December 31, 2018	6,897
Other	1
March 31, 2019	6,898
Blizzard
Goodwill [Roll Forward]
Balance at December 31, 2018	190
Other	0
March 31, 2019	190
King
Goodwill [Roll Forward]
Balance at December 31, 2018	2,675
Other	0
March 31, 2019	$ 2,675

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 20
-Section 45
-Paragraph 1
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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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