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Royalties And Licenses (Schedule Of Royalty-Related Assets) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Mar. 31, 2013
Royalty-Related Assets    
Royalty-related assets $ 197 $ 156
Other current assets
    
Royalty-Related Assets    
Royalty-related assets 102 63
Other assets
    
Royalty-Related Assets    
Royalty-related assets $ 95 $ 93