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Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Licenses | Activity related to Licenses for the nine months ended September 30, 2018, is presented below:
| Licenses
(Dollars in millions) |
Balance at December 31, 2017 | $ | 2,223 |
Acquisitions | 2 |
Transferred to Assets held for sale | (42 | )
Divestitures | (11 | )
Exchanges - Licenses received | 18 |
Exchanges - Licenses surrendered | (1 | )
Balance at September 30, 2018 | $ | 2,189 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b),(d) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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