Quarterly Financial And Market Information (Summary Of Quarterly Financial And Market Information) (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial And Market Information [Line Items]
Net revenue	$ 1,582		$ 1,160		$ 959	$ 1,449	$ 1,527	$ 1,149	$ 898	$ 1,271	$ 5,150	$ 4,845	$ 4,396
Gross profit	1,349		659		570	1,295	1,325	633	497	1,092	3,873	3,547	3,042
Operating income (loss)	753		(21)		(41)	743	717	(4)	(49)	560	1,434	1,224	898
Net income (loss)	$ 607	[1]	$ (186)	[1]	$ (22)	$ 644	$ 566	$ (1)	$ (38)	$ 440	$ 1,043	$ 967	$ 1,156
Earnings per share - Basic	$ 1.98		$ (0.60)		$ (0.07)	$ 2.08	$ 1.84	$ 0.00	$ (0.13)	$ 1.46	$ 3.39	$ 3.19	$ 3.73
Earnings per share - Diluted	1.95		(0.60)		(0.07)	2.06	1.81	0.00	(0.13)	1.40	3.34	3.08	$ 3.50
High price, Common stock per share	129.12		120.09		121.97	115.37	91.51	85.56	85.40	77.25	129.12	91.51
Low price, Common stock per share	$ 107.19		$ 100.83		$ 105.42	$ 88.40	$ 78.64	$ 75.58	$ 75.38	$ 61.85	$ 88.40	$ 61.85

[1] During the quarters ended December 31, 2017 and March 31, 2018, EA recognized a provisional tax expense due to the application of the U.S. Tax Act, enacted on December 22, 2017.