XML 12 R1.htm IDEA: XBRL DOCUMENT v3.24.0.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 22, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-03040    
Entity Registrant Name QWEST CORPORATION    
Entity Incorporation, State or Country Code CO    
Entity Tax Identification Number 84-0273800    
Entity Address, Address Line One 100 CenturyLink Drive,    
Entity Address, City or Town Monroe,    
Entity Address, State or Province LA    
Entity Address, Postal Zip Code 71203    
City Area Code 318    
Local Phone Number 388-9000    
Entity Information [Line Items]      
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction true    
Document Financial Statement Restatement Recovery Analysis false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   1  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE: None.
    
Entity Central Index Key 0000068622    
Amendment Flag false    
Entity Public Float     $ 0
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
6.5% Notes Due 2056      
Entity Information [Line Items]      
Title of 12(b) Security 6.5% Notes Due 2056    
Trading Symbol(s) CTBB    
Security Exchange Name NYSE    
6.75% Notes Due 2057      
Entity Information [Line Items]      
Title of 12(b) Security 6.75% Notes Due 2057    
Trading Symbol(s) CTDD    
Security Exchange Name NYSE