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Intangible Assets | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Note 7 Intangible Assets Licenses UScellular reviews attractive opportunities to acquire additional wireless spectrum, including pursuant to FCC auctions. UScellular also may seek to divest outright or include in exchanges wireless spectrum that is not strategic to its long-term success. Activity related to UScellular's Licenses is presented below.
| 2020 |  | 2019
(Dollars in millions) |  |  |
Balance at beginning of year | $ | 2,471 |  |  | $ | 2,186 |
Acquisitions | 171 |  |  | 267 |
Divestitures | (18) |  |  | (10) |
Exchanges - Licenses received | — |  |  | 26 |
Capitalized interest | 5 |  |  | 2 |
Balance at end of year | $ | 2,629 |  |  | $ | 2,471 |
Auction 103 In March 2020, the FCC announced by way of public notice that UScellular was the provisional winning bidder for 237 wireless spectrum licenses in the 37, 39 and 47 GHz bands (Auction 103) for $146 million. In June 2020, the wireless spectrum licenses from Auction 103 were granted by the FCC.

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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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