Segment Information Net Revenue by Platform (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Schedule of Net Revenue by Platform [Line Items]
Net revenue	$ 5,629	$ 5,537	$ 4,950
Total consoles, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue	3,716	3,774	3,333
PC and Browsers, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue	1,195	1,036	793
Mobile, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue	$ 718	$ 727	$ 824