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Long-Term Debt and Credit Facilities Long-Term Debt and Credit Facilities (Details 3) (Senior notes)
 0 Months Ended
Nov. 27, 2013
May 23, 2013
Mar. 21, 2013
6.750% Notes due 2023 | Debt Instrument, Redemption, Period One [Member] | CenturyLink, Inc.
      
Debt Instrument, Redemption [Line Items]      
Debt Instrument, Redemption Price, Percentage 106.75%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= ctl_Notes6.750PercentDue2023Member
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodOneMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		    
6.125% Notes due 2053 | Debt Instrument, Redemption, Period One [Member] | Qwest Corporation
      
Debt Instrument, Redemption [Line Items]      
Debt Instrument, Redemption Price, Percentage   100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= ctl_Notes6.125PercentDue2053Member
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodOneMember
/ dei_LegalEntityAxis
= ctl_QwestCorporationMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		  
5.625% Notes due 2020 | Debt Instrument, Redemption, Period One [Member] | CenturyLink, Inc.
      
Debt Instrument, Redemption [Line Items]      
Debt Instrument, Redemption Price, Percentage of Principal Amount 35.00%ctl_DebtinstrumentRedemptionPricePercentageofPrincipalAmount
/ us-gaap_DebtInstrumentAxis
= ctl_Notes5.625PercentDue2020Member
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodOneMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		    
Debt Instrument, Redemption Price, Percentage     105.625%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= ctl_Notes5.625PercentDue2020Member
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodOneMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
5.625% Notes due 2020 | Debt Instrument, Redemption, Period Two [Member] | CenturyLink, Inc.
      
Debt Instrument, Redemption [Line Items]      
Debt Instrument, Redemption Price, Percentage 101.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= ctl_Notes5.625PercentDue2020Member
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= us-gaap_DebtInstrumentRedemptionPeriodTwoMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember