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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

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