Balance Sheet Details (Property And Equipment, Net Schedule) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Mar. 31, 2016
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 1,289	$ 1,282
Less: accumulated depreciation	(865)	(843)
Property and equipment, net	424	439
Computer, equipment and software
Property and Equipment, Net [Line Items]
Property and equipment, gross	702	684
Buildings
Property and Equipment, Net [Line Items]
Property and equipment, gross	312	313
Leasehold improvements
Property and Equipment, Net [Line Items]
Property and equipment, gross	126	129
Equipment, furniture and fixtures, and other
Property and Equipment, Net [Line Items]
Property and equipment, gross	80	80
Land
Property and Equipment, Net [Line Items]
Property and equipment, gross	61	61
Construction in progress
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 8	$ 15

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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