Royalties And Licenses (Schedule Of Royalty-Related Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Mar. 31, 2023
Royalties and Licenses
Royalty-related assets	$ 119	$ 136
Other Current Assets
Royalties and Licenses
Royalty-related assets	88	105
Other assets
Royalties and Licenses
Royalty-related assets	$ 31	$ 31