XML 35 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document And Entity Information
 9 Months Ended
Sep. 30, 2018
shares
Entity Registrant Name TELEPHONE & DATA SYSTEMS INC /DE/
Entity Central Index Key 0001051512
Document Type 10-Q
Document Period End Date Sep. 30, 2018
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Filer Category Large Accelerated Filer
Emerging Growth Company false
Smaller Reporting Company false
Document Fiscal Year Focus 2018
Document Fiscal Period Focus Q3
Trading Symbol TDS
Common Shares  
Entity Common Stock, Shares Outstanding 105,632,416
Series A Common Shares  
Entity Common Stock, Shares Outstanding 7,281,091