Royalties And Licenses (Schedule Of Royalty-Related Assets) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Royalties and Licenses
Royalty-related assets	$ 94	$ 155
Other Current Assets
Royalties and Licenses
Royalty-related assets	57	97
Other assets
Royalties and Licenses
Royalty-related assets	$ 37	$ 58