Intangible Assets, Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 License agreements and other	Dec. 31, 2012 License agreements and other	Mar. 31, 2013 License agreements and other Maximum	Dec. 31, 2012 License agreements and other Maximum	Mar. 31, 2013 License agreements and other Minimum	Dec. 31, 2012 License agreements and other Minimum	Mar. 31, 2013 Internally developed franchises	Dec. 31, 2012 Internally developed franchises	Mar. 31, 2013 Internally developed franchises Maximum	Dec. 31, 2012 Internally developed franchises Maximum	Mar. 31, 2013 Internally developed franchises Minimum	Dec. 31, 2012 Internally developed franchises Minimum	Mar. 31, 2013 Activision trademark	Dec. 31, 2012 Activision trademark	Mar. 31, 2013 Acquired trade names	Dec. 31, 2012 Acquired trade names
Amortization expense disclosure
Amortization expense	$ 3	$ 3
Finite-Lived and Indefinite Lived Intangible Assets
Estimated useful life						10 years	10 years	3 years	3 years			12 years	12 years	11 years	11 years
Gross carrying amount, definite-lived intangible assets				98	98					309	309
Accumulated amortization, definite-lived intangible assets	(343)		(339)	(89)	(88)					(254)	(251)
Net carrying amount, definite-lived intangible assets	64		68	9	10					55	58
Gross carrying amount, intangible assets excluding goodwill	840		840
Net carrying amount, intangible assets	497		501
Indefinite Lived Intangible Assets
Gross carrying amount, indefinite-lived intangible assets																386	386	47	47
Net carrying amount, indefinite-lived intangible assets	433		433													386	386	47	47
Definite-lived intangible assets, future amortization expense disclosure
2013	21
2014	19
2015	10
2016	6
2017	4
Thereafter	4
Total	$ 64		$ 68	$ 9	$ 10					$ 55	$ 58