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Intangible Assets - Narrative (Details) - Auction 103 - U.S. Cellular $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) license
Licenses
Licenses won | license		237
Total winning bid		$ 146
FCC upfront payment	$ 24

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