(Schedule Of Royalty-Related Assets) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Royalties And Licenses [Line Items]
Royalty-related assets	$ 155	$ 156
Other Current Assets [Member]
Royalties And Licenses [Line Items]
Royalty-related assets	97	63
Other Assets [Member]
Royalties And Licenses [Line Items]
Royalty-related assets	$ 58	$ 93