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Long-Term Debt and Credit Facilities Long-Term Debt and Credit Facilities (Details 3) - Mar. 19, 2015 - CenturyLink, Inc. - Senior notes - 5.625% Notes due 2025
Total
Debt instrument, redemption, period one  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, redemption, description greater of 100% of the principal amount of the Notes or the sum of the present value of the remaining scheduled payments of principal and interest on the Notes, discounted to the redemption date in the manner described in the Notes
Debt instrument, redemption, period two  
Debt Instrument, Redemption [Line Items]  
Debt Instrument, redemption, description redeem the Notes at par
Debt instrument, redemption, period three  
Debt Instrument, Redemption [Line Items]  
Debt instrument, redemption price, percentage of principal amount (percent) 35.00%
Debt instrument, redemption price, percentage (percent) 105.625%
Debt instrument, redemption, period four  
Debt Instrument, Redemption [Line Items]  
Debt instrument, redemption price, percentage (percent) 101.00%