Segment Information (Net Revenue By Revenue Composition) (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Mar. 31, 2019	[1]	Dec. 31, 2018	[1]	Sep. 30, 2018	[1]	Jun. 30, 2018	[1]	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2019		Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 1,238		$ 1,289		$ 1,286		$ 1,137		$ 1,582	$ 1,160	$ 959	$ 1,449	$ 4,950	[1]	$ 5,150	$ 4,845
Full game downloads, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue													680		707	659
Live services, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue													2,216		2,083	1,589
Mobile, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue													814		660	626
Total Digital, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue													3,710		3,450	2,874
Total Packaged goods and other, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue													$ 1,240		$ 1,700	$ 1,971

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