Balance Sheet Details (Property And Equipment, Net Schedule) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 1,576		$ 1,521
Less: accumulated depreciation	(1,066)		(1,030)
Property and equipment, net	510		491	[1]
Depreciation expense	40	$ 31
Computer, equipment and software
Property and Equipment, Net [Line Items]
Property and equipment, gross	829		808
Buildings
Property and Equipment, Net [Line Items]
Property and equipment, gross	372		370
Leasehold improvements
Property and Equipment, Net [Line Items]
Property and equipment, gross	184		172
Equipment, furniture and fixtures, and other
Property and Equipment, Net [Line Items]
Property and equipment, gross	95		93
Land
Property and Equipment, Net [Line Items]
Property and equipment, gross	67		66
Construction in progress
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 29		$ 12

[1] Derived from audited Consolidated Financial Statements.