Government Assistance, Allocated Support Payments

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Government Assistance, Percentage

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Government Assistance Receivable

+ References

No definition available.

+ Details

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Namespace Prefix:	lumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of Unserved Locations

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of government assistance recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 832
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=128342832&loc=SL128342943-244231

+ Details

Name:	us-gaap_GovernmentAssistanceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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_GovernmentAssistanceLineItems
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Balance Type:	na
Period Type:	duration

- Definition

Indicates line item in statement of income or comprehensive income that includes government assistance.

+ References

+ Details

Name:	us-gaap_GovernmentAssistanceStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	duration

- Definition

Duration of government assistance transaction, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 832
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=128342832&loc=SL128342950-244231

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GovernmentAssistanceTypeAxis=lumn_CAFIIProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GovernmentAssistanceTypeAxis=lumn_RDOFPhaseIProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Revenue Recognition - Governmental Funding (Details) unreservedLocations in Millions, $ in Millions		3 Months Ended	12 Months Ended	84 Months Ended
	Dec. 07, 2020 USD ($) unreservedLocations	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Government Assistance [Line Items]
Government funding			$ 190
Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration]			OPERATING REVENUE
State Universal Service Fund Support Programs
Government Assistance [Line Items]
Government assistance, percentage			31.00%
CAF II Program
Government Assistance [Line Items]
Government funding		$ 59		$ 500
RDOF Phase I Program
Government Assistance [Line Items]
Allocated support payments	$ 9,200
Support payments period	10 years
Number of unserved locations \| unreservedLocations	5.2
Government funding receivable	$ 26
RDOF Phase I Program \| ILEC Business
Government Assistance [Line Items]
Government assistance, percentage	36.00%