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Revenue Recognition - Additional Information (Details) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 07, 2020 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) state | Dec. 31, 2021 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue included in contract liability |  |  | $ 169 | $ 192 |
Contract liabilities |  |  | 269 | 343 | $ 317
Performance obligation, amount |  |  | 2,000 |  |
Non-customer revenue under government assistance programs |  |  | 36 | $ 22 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Performance obligation, amount |  |  | 924 |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Performance obligation, amount |  |  | 571 |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Performance obligation, amount |  |  | $ 457 |  |
State Universal Service Fund Support Programs |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Non-customer revenue associate with state universal service fund support programs (as a percent) |  |  | 24.00% | 34.00% |
CAF Phase II Program | Lumen |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Non-customer revenue under government assistance programs |  |  |  | $ 500 | 500
CAF Phase II Program | Qwest Corporation |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Non-customer revenue under government assistance programs |  |  |  | $ 145 | $ 145
Number of states where required to meet infrastructure buildout requirements | state |  |  |  | 13 |
Previously deferred revenue recognized |  | $ 13 |  |  |
RDOF Phase I Program |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Allocated support payments | $ 6,400 |  |  |  |
Transaction duration | 10 years |  |  |  |
Minimum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Contract term |  |  | 1 year |  |
Maximum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Contract term |  |  | 5 years |  |
Average | Consumer customers, average contract life |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Customer life |  |  | 36 months |  |
Average | Business customer, average contract life |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Customer life |  |  | 33 months |  |

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