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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Fair value measurements
TDS 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
 
September 30, 2019
 
December 31, 2018
 
Book Value
 
Fair Value
 
Book Value
 
Fair Value
(Dollars in millions)
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
1
 
$
853

 
$
853

 
$
921

 
$
921

Short-term investments
1
 

 

 
17

 
17

Long-term debt
 
 
 
 
 
 
 
 
 
Retail
2
 
1,753

 
1,796

 
1,753

 
1,596

Institutional
2
 
534

 
583

 
534

 
531

Other
2
 
173

 
173

 
182

 
182