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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2021
Fair Value Disclosures [Abstract]  
Fair value measurements
UScellular has applied the provisions of fair value accounting for purposes of computing the fair value of financial instruments for disclosure purposes as displayed below.
Level within the Fair Value Hierarchy
June 30, 2021December 31, 2020
Book Value
Fair Value
Book Value
Fair Value
(Dollars in millions)
Long-term debt
Retail2$1,842 $1,942 $1,917 $1,962 
Institutional2535 670 535 707 
Other2397 397 106 106