Goodwill (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	$ 7,132
Tax benefit credited to goodwill	(4)
Foreign exchange	(1)
Goodwill, balance at end of period	7,130
Issuance of contingent consideration	3
Activision
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	6,942
Tax benefit credited to goodwill	(4)
Foreign exchange	(1)
Goodwill, balance at end of period	6,940
Issuance of contingent consideration	3
Blizzard
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	178
Tax benefit credited to goodwill	0
Foreign exchange	0
Goodwill, balance at end of period	178
Issuance of contingent consideration	0
Distribution
Changes in carrying amount of goodwill
Goodwill, balance at beginning of period	12
Tax benefit credited to goodwill	0
Foreign exchange	0
Goodwill, balance at end of period	12
Issuance of contingent consideration	$ 0