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Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Licenses
Activity related to Licenses for the nine months ended September 30, 2019, is presented below:
 
Licenses
(Dollars in millions)
 
Balance at December 31, 2018
$
2,186

Acquisitions
259

Transferred to Assets held for sale
(10
)
Exchanges - Licenses received
26

Balance at September 30, 2019
$
2,461