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Cover
Apr. 13, 2026
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Apr. 13, 2026
Registrant Name Lumen Technologies, Inc.
Entity Incorporation, State or Country Code LA
Entity File Number 001-7784
Entity Tax Identification Number 72-0651161
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
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Central Index Key 0000018926
Amendment Flag false
Common Stock  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, no-par value per share
Trading Symbol LUMN
Security Exchange Name NYSE
Preferred Stock Purchase Rights  
Document Information [Line Items]  
Title of 12(b) Security Preferred Stock Purchase Rights
No Trading Symbol Flag true
Security Exchange Name NYSE
Level 3 Parent, LLC  
Document Information [Line Items]  
Registrant Name Level 3 Parent, LLC
Entity Incorporation, State or Country Code DE
Entity File Number 001-35134
Entity Tax Identification Number 47-0210602
Entity Address, Address Line One 931 14th Street
Entity Address, City or Town Denver,
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80202
City Area Code 720
Local Phone Number 888-1000
Central Index Key 0000794323
Amendment Flag false
Qwest Corporation  
Document Information [Line Items]  
Registrant Name Qwest Corporation
Entity Incorporation, State or Country Code CO
Entity File Number 001-03040
Entity Tax Identification Number 84-0273800
Entity Address, Address Line One 931 14th Street
Entity Address, City or Town Denver,
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80202
City Area Code 318
Local Phone Number 388-9000
Central Index Key 0000068622
Amendment Flag false
Qwest Corporation | 6.5% Notes Due 2056  
Document Information [Line Items]  
Title of 12(b) Security 6.5% Notes Due 2056
Trading Symbol CTBB
Security Exchange Name NYSE
Qwest Corporation | 6.75% Notes Due 2057  
Document Information [Line Items]  
Title of 12(b) Security 6.75% Notes Due 2057
Trading Symbol CTDD
Security Exchange Name NYSE