Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Reserves and allowances	$ 11	$ 20
Allowance for sales returns and price protection	56	59
Inventory reserve	5	2
Accrued expenses	65	101
Deferred revenue	357	330
Tax credit carryforwards	62	43
Net operating loss carryforwards	14	15
Stock-based compensation	119	91
Foreign deferred assets	7	16
Other	2	5
Deferred tax assets	698	682
Valuation allowance	0	0
Deferred tax assets, net of valuation allowance	698	682
Deferred tax liabilities:
Intangibles	(161)	(177)
Prepaid royalties	0	(2)
Capitalized software development expenses	(54)	(33)
State taxes	(21)	(18)
Deferred tax liabilities	(236)	(230)
Net deferred tax assets (liabilities)	462	452
Operating loss carryforwards not subject to limitations of internal revenue code	17
Tax credit carryforward, federal	6
Tax credit carrforwards, state	56
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	$ 45