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Balance Sheet Details (Inventories Schedule) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Mar. 31, 2013
Balance Sheet Related Disclosures [Abstract]    
Raw materials and work in process $ 0 $ 1
Finished goods 41 41
Inventories $ 41 $ 42 [1]
[1] Derived from audited consolidated financial statements.