Segment Information (Net Revenue By Platform) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Net Revenue by Platform [Line Items]
Revenue, Net	$ 1,203	$ 1,214
Xbox One, PLAYSTATION 4
Net Revenue by Platform [Line Items]
Revenue, Net	487	293
Xbox 360, PLAYSTATION 3
Net Revenue by Platform [Line Items]
Revenue, Net	293	543
Other consoles
Net Revenue by Platform [Line Items]
Revenue, Net	2	3
Total consoles
Net Revenue by Platform [Line Items]
Revenue, Net	782	839
PC and Browsers, net revenue
Net Revenue by Platform [Line Items]
Revenue, Net	253	231
Mobile, net revenue
Net Revenue by Platform [Line Items]
Revenue, Net	145	123
Other, net revenue
Net Revenue by Platform [Line Items]
Revenue, Net	$ 23	$ 21