Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total operating revenue	$ 5,915	$ 6,449	$ 6,951
Adjustments for Non-ASC 606 Revenue	(315)	(373)	(483)
Total Revenue from Contracts with Customers	5,600	6,076	6,468
Goods and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	23	28	30
Services performed over time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	5,577	6,048	6,438
Other Broadband
Disaggregation of Revenue [Line Items]
Total operating revenue	1,111	1,275	1,360
Adjustments for Non-ASC 606 Revenue	(95)	(106)	(107)
Total Revenue from Contracts with Customers	1,016	1,169	1,253
Voice and Other
Disaggregation of Revenue [Line Items]
Total operating revenue	589	691	985
Adjustments for Non-ASC 606 Revenue	(16)	(31)	(161)
Total Revenue from Contracts with Customers	573	660	824
Fiber Broadband
Disaggregation of Revenue [Line Items]
Total operating revenue	470	461	408
Adjustments for Non-ASC 606 Revenue	(12)	(12)	0
Total Revenue from Contracts with Customers	458	449	408
Harvest
Disaggregation of Revenue [Line Items]
Total operating revenue	1,048	1,134	1,206
Adjustments for Non-ASC 606 Revenue	(139)	(161)	(167)
Total Revenue from Contracts with Customers	909	973	1,039
Nuture
Disaggregation of Revenue [Line Items]
Total operating revenue	393	435	450
Adjustments for Non-ASC 606 Revenue	(8)	(9)	(10)
Total Revenue from Contracts with Customers	385	426	440
Grow
Disaggregation of Revenue [Line Items]
Total operating revenue	145	159	153
Adjustments for Non-ASC 606 Revenue	0	(9)	(9)
Total Revenue from Contracts with Customers	145	150	144
Affiliate Services
Disaggregation of Revenue [Line Items]
Total operating revenue	2,159	2,294	2,389
Adjustments for Non-ASC 606 Revenue	(45)	(45)	(29)
Total Revenue from Contracts with Customers	$ 2,114	$ 2,249	$ 2,360