Income Taxes (Details 4) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Allowance for sales returns and price protection	$ 66	$ 74
Inventory reserve	11	9
Accrued expenses	40	38
Deferred revenue	288	291
Tax credit carryforwards	58	50
Net operating loss carryforwards	10	10
Stock-based compensation	54	69
Transaction costs	9	9
Other	19	13
Deferred tax assets	555	563
Valuation allowance	0	0
Deferred tax assets, net of valuation allowance	555	563
Deferred tax liabilities:
Intangibles	(166)	(169)
Prepaid royalties	(30)	(22)
Capitalized software development expenses	(81)	(84)
State taxes	(7)	(34)
Other	(6)	0
Deferred tax liabilities	(290)	(309)
Net deferred tax assets	$ 265	$ 254