Balance Sheet Details (Deferred Net Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Current	$ 1,305		$ 1,527	[1]
Deferred Revenue, Revenue Recognized	961	$ 742
Online enabled games [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Current	1,305		1,527
Other [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Current	113		95
Noncurrent [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Noncurrent	26		14
Total [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	$ 1,444		$ 1,636

[1] Derived from audited Consolidated Financial Statements.