XML 83 R49.htm IDEA: XBRL DOCUMENT
v3.21.2

Intangible Assets - Narrative (Details) $ in Millions |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 01, 2021 USD ($) | Jun. 30, 2021 USD ($) license | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Licenses |  |  |  |
Cash paid for licenses |  | $ 1,264 | $ 144 |
Auction 107 |  |  |  |
Licenses |  |  |  |
Licenses won | license |  | 254 |  |
Total winning bid |  | $ 1,283 |  |
FCC upfront payment |  |  |  | $ 30
Auction 107 | Subsequent event |  |  |  |
Licenses |  |  |  |
Cash paid for licenses | $ 178 |  |  |

X
- Definition Total number of licenses won in an FCC license auction. + References No definition available. + Details
Name: | tds_FccLicenseAuctionTotalLicensesWon
Namespace Prefix: | tds_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total winning bid amount in a FCC license auction. + References No definition available. + Details
Name: | tds_FccLicenseAuctionTotalWinningBid
Namespace Prefix: | tds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Federal Communications Commission License Auction, Upfront Payment + References No definition available. + Details
Name: | tds_FederalCommunicationsCommissionLicenseAuctionUpfrontPayment
Namespace Prefix: | tds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | tds_AcquisitionEventAxis=tds_Auction107AquisitionEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |