Share-Based Payments - Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense before income taxes	$ 218	$ 166	$ 209
Income tax benefit	(28)	(29)	(46)
Total share-based compensation expense, net of income tax benefit	190	137	163
Cost of revenues—product sales: Software royalties, amortization, and intellectual property licenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense before income taxes	14	19	13
Cost of revenues—in-game, subscription, and other: Game Operations and Distribution Costs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense before income taxes	1	1	2
Cost of revenues—in-game, subscription, and other: Software royalties, amortization, and intellectual property licenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense before income taxes	0	1	3
Product development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense before income taxes	42	53	61
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense before income taxes	21	10	15
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense before income taxes	$ 140	$ 82	$ 115