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(Schedule Of Royalty-Related Assets) (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Mar. 31, 2021
Royalties And Licenses [Line Items]    
Royalty-related assets $ 63 $ 44
Other Current Assets [Member]    
Royalties And Licenses [Line Items]    
Royalty-related assets 35 24
Other Assets [Member]    
Royalties And Licenses [Line Items]    
Royalty-related assets $ 28 $ 20