Segment Information (Net Revenue By Platform) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net Revenue by Platform [Line Items]
Net revenue	$ 1,826	$ 1,151	$ 3,377	$ 2,610
Console
Net Revenue by Platform [Line Items]
Net revenue	1,198	714	2,170	1,646
PC and other
Net Revenue by Platform [Line Items]
Net revenue	377	249	738	574
Mobile
Net Revenue by Platform [Line Items]
Net revenue	$ 251	$ 188	$ 469	$ 390