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Goodwill And Acquisition-Related Intangibles, Net | 9 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill And Acquisition-Related Intangibles, Net | (7) GOODWILL AND ACQUISITION-RELATED INTANGIBLES, NET The changes in the carrying amount of goodwill for the nine months ended December 31, 2020 are as follows (in millions):
| As of March 31, 2020 |  | Activity |  | Effects of Foreign Currency Translation |  | As of December 31, 2020
Goodwill | $ | 2,253 |  |  | $ | — |  |  | $ | 11 |  |  | $ | 2,264 |
Accumulated impairment | (368) |  |  | — |  |  | — |  |  | (368) |
Total | $ | 1,885 |  |  | $ | — |  |  | $ | 11 |  |  | $ | 1,896 |
Acquisition-related intangibles consisted of the following (in millions):
| As of December 31, 2020 |  | As of March 31, 2020
| Gross Carrying Amount |  | Accumulated Amortization |  | Acquisition- Related Intangibles, Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Acquisition- Related Intangibles, Net
Developed and core technology | $ | 474 |  |  | $ | (458) |  |  | $ | 16 |  |  | $ | 474 |  |  | $ | (450) |  |  | $ | 24 |
Trade names and trademarks | 161 |  |  | (140) |  |  | 21 |  |  | 161 |  |  | (132) |  |  | 29 |
Registered user base and other intangibles | 5 |  |  | (5) |  |  | — |  |  | 5 |  |  | (5) |  |  | — |
Carrier contracts and related | 85 |  |  | (85) |  |  | — |  |  | 85 |  |  | (85) |  |  | — |
Total | $ | 725 |  |  | $ | (688) |  |  | $ | 37 |  |  | $ | 725 |  |  | $ | (672) |  |  | $ | 53 |
Amortization of intangibles for the three and nine months ended December 31, 2020 and 2019 are classified in the Condensed Consolidated Statements of Operations as follows (in millions):
| Three Months Ended December 31, |  | Nine Months Ended December 31,
| 2020 |  | 2019 |  | 2020 |  | 2019
Cost of revenue | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | 9 |
Operating expenses | 5 |  |  | 5 |  |  | 16 |  |  | 16 |
Total | $ | 5 |  |  | $ | 10 |  |  | $ | 16 |  |  | $ | 25 |
Acquisition-related intangible assets are amortized using the straight-line method over the lesser of their estimated useful lives or the agreement terms, currently from 1 to 5 years. As of December 31, 2020 and March 31, 2020, the weighted-average remaining useful life for acquisition-related intangible assets was approximately 1.7 and 2.4 years, respectively. As of December 31, 2020, future amortization of finite-lived acquisition-related intangibles that will be recorded in the Condensed Consolidated Statements of Operations is estimated as follows (in millions):
Fiscal Year Ending March 31, |
2021 (remaining three months) | $ | 6 |
2022 | 22 |
2023 | 9 |
2024 and thereafter | — |
Total | $ | 37 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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