Balance Sheet Details (Property And Equipment, Net Schedule) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Mar. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,376	$ 1,315
Less accumulated depreciation	(923)	(881)
Property and equipment, net	453	434
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	744	723
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	336	316
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	139	126
Equipment, furniture and fixtures, and other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	84	82
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	66	61
Construction in progress
Property, Plant and Equipment [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

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+ References

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