Segment Information (Net Revenue By Revenue Composition ) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Revenue Reconciling Item
Net revenue	$ 1,137	$ 1,449
Live services, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	610	501
Mobile, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	231	169
Full game downloads, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	116	209
Total Digital, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	957	879
Total Packaged goods and other, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	$ 180	$ 570