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Revenue Recognition - Additional Information (Details) $ in Millions		3 Months Ended	12 Months Ended
	Dec. 07, 2020 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2021 USD ($) state	Dec. 31, 2022 USD ($)
Disaggregation of Revenue [Line Items]
Revenue included in contract liability			$ 175	$ 169
Contract liabilities			244	269		$ 343
Performance obligation, amount			2,200
Non-customer revenue under government assistance programs			31	$ 36
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Performance obligation, amount			944
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Disaggregation of Revenue [Line Items]
Performance obligation, amount			832
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Disaggregation of Revenue [Line Items]
Performance obligation, amount			$ 452
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)			29.00%	24.00%
CAF Phase II Program | Lumen
Disaggregation of Revenue [Line Items]
Non-customer revenue under government assistance programs					$ 500
CAF Phase II Program | Qwest Corporation
Disaggregation of Revenue [Line Items]
Non-customer revenue under government assistance programs					$ 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			50 months
Average | Business customer, average contract life
Disaggregation of Revenue [Line Items]
Customer life			35 months

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