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(Schedule Of Royalty-Related Liabilities) (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Mar. 31, 2022
Royalty-Related Liabilities [Line Items]    
Royalty-related liabilities $ 208 $ 206
Accrued royalties    
Royalty-Related Liabilities [Line Items]    
Royalty-related liabilities 208 203
Other Liabilities [Member]    
Royalty-Related Liabilities [Line Items]    
Royalty-related liabilities $ 0 $ 3