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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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