XML 46 R36.htm IDEA: XBRL DOCUMENT
v3.22.1

Revenue Recognition - Additional Information - Contract Costs (Details) - Weighted Average | 3 Months Ended
--- | ---
Mar. 31, 2022
Mass Markets Customers, Average Contract Life |
Contract Costs [Line Items] |
Length of customer life | 32 months
Business Customer, Average Contract Life |
Contract Costs [Line Items] |
Length of customer life | 30 months

X
- Definition Revenue from Contract with Customer, Length of Customer Life + References No definition available. + Details
Name: | lumn_RevenueFromContractWithCustomerLengthOfCustomerLife
Namespace Prefix: | lumn_
Data Type: | xbrli:durationItemType
Balance Type: | na
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_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_MajorCustomersAxis=lumn_MassMarketsCustomersAverageContractLifeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=lumn_BusinessCustomerAverageContractLifeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |