Segment Information (Net Revenue By Revenue Composition) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 5,629	$ 5,537	$ 4,950
Full game, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	1,613	1,887	1,793
Full game downloads, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	918	811	681
Packaged goods, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	695	1,076	1,112
Live services and other, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 4,016	$ 3,650	$ 3,157