Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total Revenue	$ 1,161	$ 1,363	$ 3,589	$ 4,144
Adjustments for non-ASC 606 revenue	(69)	(69)	(205)	(217)
Total Revenue from Contracts with Customers	1,092	1,294	3,384	3,927
Other Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	186	226	588	716
Adjustments for non-ASC 606 revenue	(17)	(19)	(54)	(60)
Total Revenue from Contracts with Customers	169	207	534	656
Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	111	127	336	391
Adjustments for non-ASC 606 revenue	(4)	(2)	(1)	(10)
Total Revenue from Contracts with Customers	107	125	335	381
Fiber Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	78	92	246	289
Adjustments for non-ASC 606 revenue	(3)	(3)	(9)	(9)
Total Revenue from Contracts with Customers	75	89	237	280
Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	199	225	633	704
Adjustments for non-ASC 606 revenue	(29)	(29)	(92)	(92)
Total Revenue from Contracts with Customers	170	196	541	612
Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	79	90	248	268
Adjustments for non-ASC 606 revenue	(2)	(2)	(7)	(6)
Total Revenue from Contracts with Customers	77	88	241	262
Grow
Disaggregation of Revenue [Line Items]
Total Revenue	31	33	97	100
Adjustments for non-ASC 606 revenue	(2)	(2)	(6)	(4)
Total Revenue from Contracts with Customers	29	31	91	96
Affiliate Services
Disaggregation of Revenue [Line Items]
Total Revenue	477	570	1,441	1,676
Adjustments for non-ASC 606 revenue	(12)	(12)	(36)	(36)
Total Revenue from Contracts with Customers	$ 465	$ 558	$ 1,405	$ 1,640