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.

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Background (Details) - state	Oct. 06, 2026	Jun. 11, 2026	Feb. 02, 2026
Qwest Corporation \| 6.500% Notes due 2051 \| Senior Notes
Disposal Group, Including Discontinued Operations [Line Items]
Stated interest rate (as a percent)		6.50%
Qwest Corporation \| 6.750% Notes due 2052 \| Senior Notes
Disposal Group, Including Discontinued Operations [Line Items]
Stated interest rate (as a percent)		6.75%
Subsequent Event \| Qwest Corporation \| 6.500% Notes due 2051 \| Senior Notes
Disposal Group, Including Discontinued Operations [Line Items]
Stated interest rate (as a percent)	6.50%
Subsequent Event \| Qwest Corporation \| 6.750% Notes due 2052 \| Senior Notes
Disposal Group, Including Discontinued Operations [Line Items]
Stated interest rate (as a percent)	6.75%
Disposed of by sale \| Mass Markets Fiber-to-the Home Business
Disposal Group, Including Discontinued Operations [Line Items]
Number of states in which the business is conducted			11