Goodwill (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	$ 7,092,000,000
Tax benefit credited to goodwill	(3,000,000)
Goodwill, balance at end of period	7,089,000,000
Activision
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	6,914,000,000
Tax benefit credited to goodwill	(3,000,000)
Goodwill, balance at end of period	6,911,000,000
Blizzard
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	178,000,000
Tax benefit credited to goodwill	0
Goodwill, balance at end of period	$ 178,000,000