Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	$ 7,095,000,000	$ 7,086,000,000
Additions through acquisition	2,675,000,000	12,000,000
Other	(2,000,000)	(3,000,000)
Goodwill, balance at end of period	9,768,000,000	7,095,000,000
Accumulated impairment losses	0	0
Activision
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	6,905,000,000	6,908,000,000
Additions through acquisition	0	0
Other	(2,000,000)	(3,000,000)
Goodwill, balance at end of period	6,903,000,000	6,905,000,000
Blizzard
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	178,000,000	178,000,000
Additions through acquisition	0	0
Other	0	0
Goodwill, balance at end of period	178,000,000	178,000,000
King
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	0	0
Additions through acquisition	2,675,000,000	0
Other	0	0
Goodwill, balance at end of period	2,675,000,000	0
Other
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	12,000,000	0
Additions through acquisition	0	12,000,000
Other	0	0
Goodwill, balance at end of period	$ 12,000,000	$ 12,000,000