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Document And Entity Information
 9 Months Ended
Sep. 30, 2015
shares
Entity Registrant Name TELEPHONE & DATA SYSTEMS INC /DE/
Entity Central Index Key 0001051512
Document Type 10-Q
Document Period End Date Sep. 30, 2015
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Filer Category Large Accelerated Filer
Document Fiscal Year Focus 2015
Document Fiscal Period Focus Q3
Trading Symbol TDS
Common Shares  
Entity Common Stock, Shares Outstanding 101,556,713
Series A Common Shares  
Entity Common Stock, Shares Outstanding 7,204,168