Segment Information (Net Revenue By Platform) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Net Revenue by Platform [Line Items]
Revenue, Net	$ 1,070	$ 1,126	$ 3,088	$ 3,330
Xbox One, PLAYSTATION 4
Net Revenue by Platform [Line Items]
Revenue, Net	571	427	1,390	1,037
Xbox 360, PLAYSTATION 3
Net Revenue by Platform [Line Items]
Revenue, Net	157	306	605	1,157
Other consoles
Net Revenue by Platform [Line Items]
Revenue, Net	3	9	6	18
Total consoles
Net Revenue by Platform [Line Items]
Revenue, Net	731	742	2,001	2,212
PC and Browsers, net revenue
Net Revenue by Platform [Line Items]
Revenue, Net	182	218	619	657
Mobile, net revenue
Net Revenue by Platform [Line Items]
Revenue, Net	128	122	397	368
Other, net revenue
Net Revenue by Platform [Line Items]
Revenue, Net	$ 29	$ 44	$ 71	$ 93