Balance Sheet Details (Property And Equipment, Net Schedule) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Mar. 31, 2017
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 1,342	$ 1,315
Less: accumulated depreciation	(906)	(881)
Property and equipment, net	436	434
Computer, equipment and software
Property and Equipment, Net [Line Items]
Property and equipment, gross	737	723
Buildings
Property and Equipment, Net [Line Items]
Property and equipment, gross	320	316
Leasehold improvements
Property and Equipment, Net [Line Items]
Property and equipment, gross	133	126
Equipment, furniture and fixtures, and other
Property and Equipment, Net [Line Items]
Property and equipment, gross	84	82
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	$ 7	$ 7

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

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
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