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Balance Sheet Details (Inventories Schedule) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Mar. 31, 2013
Balance Sheet Related Disclosures [Abstract]    
Finished goods $ 54 $ 41
Raw materials and work in process 4 1
Inventories $ 58 $ 42 [1]
[1] Derived from audited consolidated financial statements.