|
Goodwill And Acquisition-Related Intangibles, Net (Schedule Of Acquisition-Related Intangibles) (Details) (USD $)
In Millions, unless otherwise specified
|
Mar. 31, 2015
|
Mar. 31, 2014
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross carrying amount |
$ 833 |
$ 833 |
| Accumulated amortization |
(722) |
(656) |
| Acquisition-related intangibles, net |
111 |
177 |
| Developed And Core Technology |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross carrying amount |
531 |
531 |
| Accumulated amortization |
(439) |
(385) |
| Acquisition-related intangibles, net |
92 |
146 |
| Trade Names And Trademarks |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross carrying amount |
130 |
130 |
| Accumulated amortization |
(111) |
(105) |
| Acquisition-related intangibles, net |
19 |
25 |
| Registered User Base And Other Intangibles |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross carrying amount |
87 |
87 |
| Accumulated amortization |
(87) |
(87) |
| Acquisition-related intangibles, net |
0 |
0 |
| Carrier Contracts And Related |
|
|
| Finite-Lived Intangible Assets [Line Items] |
|
|
| Gross carrying amount |
85 |
85 |
| Accumulated amortization |
(85) |
(79) |
| Acquisition-related intangibles, net |
$ 0 |
$ 6 |