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v3.25.0.1

Background and Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 17, 2024 | Jan. 01, 2024 | Feb. 25, 2019
Accounting Policies [Line Items] |  |  |  |  |  |
Advertising expense | $ 94 | $ 87 | $ 62 |  |  |
Book overdrafts | $ 1 | $ 0 |  |  |  |
Accounts receivable, period past due (in days) | 30 days |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.00 | $ 1.00 |  | $ 1.00 |  |
Unissued shares of century link common stock (in shares) | 41,000,000 |  |  |  |  |
Preferred stock dividends (in dollars per share) | $ 25 |  |  |  |  |
Number of shares issued per share of common stock |  |  |  |  |  | 1
Depreciation | $ 1,900 | $ 1,900 | $ 2,100 |  |  |
Diluted loss per common share (in dollars per share) | $ (0.06) | $ (10.48) | $ (1.54) |  |  |
Service Life |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Depreciation | $ (63) |  |  |  |  |
Depreciation, net of tax | $ (48) |  |  |  |  |
Diluted loss per common share (in dollars per share) | $ 0.05 |  |  |  |  |
Fiber Network Assets |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Property, plant and equipment, useful life (in years) |  | 25 years |  |  | 30 years |
Capitalized Software |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life (in years) | 7 years |  |  |  |  |
Minimum |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Contract term (in years) | 1 year |  |  |  |  |
Minimum | Customer Relationships |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life (in years) | 7 years |  |  |  |  |
Minimum | Other Intangible Assets |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life (in years) | 9 years |  |  |  |  |
Maximum |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Contract term (in years) | 5 years |  |  |  |  |
Customer relationship period for revenue recognition (in years) | 20 years |  |  |  |  |
Maximum | Customer Relationships |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life (in years) | 14 years |  |  |  |  |
Maximum | Other Intangible Assets |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Estimated useful life (in years) | 20 years |  |  |  |  |
Weighted Average | Mass Markets |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Length of customer life (in months) | 50 months |  |  |  |  |
Weighted Average | Business |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |
Length of customer life (in months) | 35 months |  |  |  |  |

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