Royalties And Licenses (Schedule Of Royalty-Related Liabilities) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Mar. 31, 2016 |
|---|---|---|
| Royalty Related Liabilities | ||
| Royalty-related liabilities | $ 273 | $ 277 |
| Accrued royalties | ||
| Royalty Related Liabilities | ||
| Royalty-related liabilities | 162 | 159 |
| Other liabilities | ||
| Royalty Related Liabilities | ||
| Royalty-related liabilities | $ 111 | $ 118 |