Segment Information (Net Revenue By Revenue Composition) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 1,387	$ 1,593	$ 1,348	$ 1,209	$ 1,238	$ 1,289	$ 1,286	$ 1,137	$ 5,537	$ 4,950	$ 5,150
Full game downloads, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue									809	680	707
Live services, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue									2,813	2,216	2,083
Mobile, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue									692	814	660
Total Digital, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue									4,314	3,710	3,450
Total Packaged goods and other, net revenue [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue									$ 1,223	$ 1,240	$ 1,700