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Goodwill And Acquisition-Related Intangibles (Schedule Of Changes In The Carrying Amount Of Goodwill) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Goodwill [Roll Forward] | ||
| Goodwill, Gross, Beginning balance | $ 2,091 | $ 2,089 |
| Accumulated impairment, beginning balance | (368) | (368) |
| Goodwill, Net, Beginning balance | 1,723 | 1,721 |
| Goodwill acquired | 0 | 5 |
| Effects of foreign currency translation | (10) | (3) |
| Goodwill, Gross, Ending balance | 2,081 | 2,091 |
| Accumulated impairment, ending balance | (368) | (368) |
| Goodwill, Net, Ending balance | $ 1,713 | $ 1,723 |