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Consolidated Statement of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity (Parenthetical) [Abstract]
TDS Common and Series A Common Share dividends (in dollars per share)	$ 0.170	$ 0.165	$ 0.34	$ 0.33

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- Definition

Statement of Stockholders' Equity (Parenthetical)

+ References

No definition available.

+ Details

Name:	tds_StatementofStockholdersEquityParentheticalAbstract
Namespace Prefix:	tds_
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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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