XML 133 R100.htm IDEA: XBRL DOCUMENT
v3.22.4

Employee Benefits - Derivative Instruments (Details) - Combined Pension Plan - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Exchange-traded U.S. equity futures |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | $ 70 | $ 108
Exchange-traded Treasury and other interest rate futures |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | 1,256 | 1,688
Exchange-traded Foreign currency futures |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | 2 | 11
Exchange-traded EURO futures |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | 0 | 5
Interest rate swaps |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | 82 | 127
Credit default swaps |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | 139 | 132
Index swaps |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | 90 | 1,036
Foreign exchange forwards |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | 50 | 93
Options |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Derivative, notional amount | $ 251 | $ 654

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_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=lumn_ExchangeTradedDomesticEquityFuturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=lumn_ExchangeTradedTreasuryFuturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeFutureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=lumn_ExchangetradedEurofuturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CreditDefaultSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_EquitySwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_OptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |