Balance Sheet Details (Property And Equipment, Net Schedule) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,319	$ 1,279
Less accumulated depreciation	(809)	(731)
Property and equipment, net	510	548
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	718	660
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	327	336
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	129	129
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	67	72
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	63	64
Warehouse equipment and other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10	10
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5	$ 8