Segment Information Net Revenue by Platform (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Schedule of Net Revenue by Platform [Line Items]
Net revenue	$ 1,582	$ 1,160	$ 959	$ 1,449	$ 1,527	$ 1,149	$ 898	$ 1,271	$ 5,150	$ 4,845	$ 4,396
Total consoles, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue									3,635	3,390	2,942
Other consoles, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue									140	334	759
PC and Browsers, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue									827	773	814
Mobile, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue									672	627	548
Other, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue									16	55	92
Xbox One, PLAYSTATION 4, net revenue [Domain]
Schedule of Net Revenue by Platform [Line Items]
Net revenue									$ 3,495	$ 3,056	$ 2,183