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Goodwill And Acquisition-Related Intangibles, Net (Schedule Of Amortization Of Intangible Assets) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 31, 2013
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| Finite-Lived Intangible Assets Classified by Expense | |||
| Amortization of intangibles | $ 14 | $ 16 | $ 30 |
| Cost of product | |||
| Finite-Lived Intangible Assets Classified by Expense | |||
| Amortization of intangibles | 16 | 33 | 55 |
| Cost of service and other | |||
| Finite-Lived Intangible Assets Classified by Expense | |||
| Amortization of intangibles | 36 | 27 | 38 |
| Operating expenses | |||
| Finite-Lived Intangible Assets Classified by Expense | |||
| Amortization of intangibles | 14 | 16 | 30 |
| Total amortization | |||
| Finite-Lived Intangible Assets Classified by Expense | |||
| Amortization of intangibles | $ 66 | $ 76 | $ 123 |