Royalties And Licenses (Schedule Of Royalty-Related Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Mar. 31, 2022
Royalties and Licenses
Royalty-related assets	$ 73	$ 63
Other Current Assets
Royalties and Licenses
Royalty-related assets	45	35
Other assets
Royalties and Licenses
Royalty-related assets	$ 28	$ 28