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Revenue Recognition - Contract Cost Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Contract cost assets
Total contract cost assets	$ 147	$ 149
Sales commissions
Contract cost assets
Total contract cost assets	145	143
Installation costs
Contract cost assets
Total contract cost assets	$ 2	$ 6

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- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479483/340-40-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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Period Type:	duration

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- Details

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Namespace Prefix:
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Period Type:

X

- Details

Name:	us-gaap_CapitalizedContractCostAxis=tds_InstallationCostsMember
Namespace Prefix:
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Period Type: