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Revenue Recognition (Tables)
6 Months Ended
Jun. 30, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
In the following table, UScellular's revenues are disaggregated by type of service, which represents the relevant categorization of revenues for UScellular, and timing of recognition. Service revenues are recognized over time and Equipment sales are point in time.  
Three Months Ended
June 30,
Six Months Ended
June 30,
2021202020212020
(Dollars in millions)
Revenues from contracts with customers:
Retail service$686 $658 $1,371 $1,329 
Inbound roaming28 41 56 77 
Other service40 35 77 71 
Service revenues from contracts with customers754 734 1,504 1,477 
Equipment sales240 220 492 422 
Total revenues from contracts with customers994 954 1,996 1,899 
Operating lease income20 19 41 38 
Total operating revenues$1,014 $973 $2,037 $1,937 
Contract with Customer, Assets and Liabilities
The following table provides balances for contract assets from contracts with customers, which are recorded in Other current assets and Other assets and deferred charges in the Consolidated Balance Sheet, and contract liabilities from contracts with customers, which are recorded in Customer deposits and deferred revenues and Other deferred liabilities and credits in the Consolidated Balance Sheet.
 June 30, 2021December 31, 2020
(Dollars in millions) 
Contract assets$11 $10 
Contract liabilities$183 $171 
Remaining Performance Obligations
The following table includes estimated service revenues expected to be recognized related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period. These estimates represent service revenues to be recognized when wireless services are delivered to customers pursuant to service plan contracts and under certain roaming agreements with other carriers. These estimates are based on contracts in place as of June 30, 2021 and may vary from actual results. As practical expedients, revenue related to contracts of less than one year, generally month-to-month contracts, and contracts with a fixed per-unit price and variable quantity, are excluded from these estimates. 
Service Revenues
(Dollars in millions)
Remainder of 2021$162 
2022124 
Thereafter139 
Total
$425