Segment Information (Net Revenue By Revenue Composition ) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item
Net revenue	$ 1,673	$ 1,593	$ 4,283	$ 4,150
Recognized at a point in time
Segment Reporting, Revenue Reconciling Item
Net revenue	860	772	1,639	1,649
Recognized over time
Segment Reporting, Revenue Reconciling Item
Net revenue	813	821	2,644	2,501
Full game, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	722	689	1,363	1,531
Full game downloads, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	347	286	733	600
Packaged goods, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	375	403	630	931
Live services and other, net revenue [Member]
Segment Reporting, Revenue Reconciling Item
Net revenue	$ 951	$ 904	$ 2,920	$ 2,619