Revenue Recognition - Revenue by Segment, Sales Channel and Product Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total Revenue	$ 13,108	$ 14,557	$ 17,478
Adjustments for Non-ASC 606 Revenue	(979)	(1,036)	(1,370)
Total Revenue from Contracts with Customers	12,129	13,521	16,108
Goods and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	136	178	154
Services performed over time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	11,993	13,343	15,954
Business
Disaggregation of Revenue [Line Items]
Total Revenue	10,363	11,583	13,099
Mass Markets
Disaggregation of Revenue [Line Items]
Total Revenue	2,745	2,974	4,379
Operating Segments | Business
Disaggregation of Revenue [Line Items]
Total Revenue	10,363	11,583	13,099
Adjustments for Non-ASC 606 Revenue	(830)	(858)	(1,017)
Total Revenue from Contracts with Customers	9,533	10,725	12,082
Operating Segments | Business | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	4,373	4,494	4,618
Adjustments for Non-ASC 606 Revenue	(657)	(654)	(757)
Total Revenue from Contracts with Customers	3,716	3,840	3,861
Operating Segments | Business | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	2,961	3,493	4,128
Adjustments for Non-ASC 606 Revenue	(19)	(25)	(23)
Total Revenue from Contracts with Customers	2,942	3,468	4,105
Operating Segments | Business | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	2,271	2,679	3,411
Adjustments for Non-ASC 606 Revenue	(148)	(170)	(226)
Total Revenue from Contracts with Customers	2,123	2,509	3,185
Operating Segments | Business | Other
Disaggregation of Revenue [Line Items]
Total Revenue	758	917	942
Adjustments for Non-ASC 606 Revenue	(6)	(9)	(11)
Total Revenue from Contracts with Customers	752	908	931
Operating Segments | Business | Large Enterprise
Disaggregation of Revenue [Line Items]
Total Revenue	3,379	3,618	3,827
Adjustments for Non-ASC 606 Revenue	(257)	(184)	(208)
Total Revenue from Contracts with Customers	3,122	3,434	3,619
Operating Segments | Business | Large Enterprise | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	1,733	1,709	1,653
Adjustments for Non-ASC 606 Revenue	(256)	(179)	(199)
Total Revenue from Contracts with Customers	1,477	1,530	1,454
Operating Segments | Business | Large Enterprise | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	1,015	1,172	1,274
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	1,015	1,172	1,274
Operating Segments | Business | Large Enterprise | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	441	537	690
Adjustments for Non-ASC 606 Revenue	0	0	(2)
Total Revenue from Contracts with Customers	441	537	688
Operating Segments | Business | Large Enterprise | Other
Disaggregation of Revenue [Line Items]
Total Revenue	190	200	210
Adjustments for Non-ASC 606 Revenue	(1)	(5)	(7)
Total Revenue from Contracts with Customers	189	195	203
Operating Segments | Business | Mid-Market Enterprise
Disaggregation of Revenue [Line Items]
Total Revenue	1,887	2,044	2,242
Adjustments for Non-ASC 606 Revenue	(34)	(36)	(40)
Total Revenue from Contracts with Customers	1,853	2,008	2,202
Operating Segments | Business | Mid-Market Enterprise | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	841	807	768
Adjustments for Non-ASC 606 Revenue	(25)	(28)	(32)
Total Revenue from Contracts with Customers	816	779	736
Operating Segments | Business | Mid-Market Enterprise | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	690	829	949
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	690	829	949
Operating Segments | Business | Mid-Market Enterprise | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	320	372	494
Adjustments for Non-ASC 606 Revenue	(4)	(4)	(6)
Total Revenue from Contracts with Customers	316	368	488
Operating Segments | Business | Mid-Market Enterprise | Other
Disaggregation of Revenue [Line Items]
Total Revenue	36	36	31
Adjustments for Non-ASC 606 Revenue	(5)	(4)	(2)
Total Revenue from Contracts with Customers	31	32	29
Operating Segments | Business | Public Sector
Disaggregation of Revenue [Line Items]
Total Revenue	1,849	1,789	1,863
Adjustments for Non-ASC 606 Revenue	(89)	(82)	(84)
Total Revenue from Contracts with Customers	1,760	1,707	1,779
Operating Segments | Business | Public Sector | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	596	473	445
Adjustments for Non-ASC 606 Revenue	(85)	(81)	(79)
Total Revenue from Contracts with Customers	511	392	366
Operating Segments | Business | Public Sector | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	355	399	492
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	355	399	492
Operating Segments | Business | Public Sector | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	389	383	466
Adjustments for Non-ASC 606 Revenue	(4)	(1)	(3)
Total Revenue from Contracts with Customers	385	382	463
Operating Segments | Business | Public Sector | Other
Disaggregation of Revenue [Line Items]
Total Revenue	509	534	460
Adjustments for Non-ASC 606 Revenue	0	0	(2)
Total Revenue from Contracts with Customers	509	534	458
Operating Segments | Business | Wholesale
Disaggregation of Revenue [Line Items]
Total Revenue	2,875	3,152	3,605
Adjustments for Non-ASC 606 Revenue	(446)	(441)	(509)
Total Revenue from Contracts with Customers	2,429	2,711	3,096
Operating Segments | Business | Wholesale | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	1,048	1,052	991
Adjustments for Non-ASC 606 Revenue	(287)	(251)	(271)
Total Revenue from Contracts with Customers	761	801	720
Operating Segments | Business | Wholesale | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	740	827	1,012
Adjustments for Non-ASC 606 Revenue	(19)	(25)	(23)
Total Revenue from Contracts with Customers	721	802	989
Operating Segments | Business | Wholesale | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	1,079	1,261	1,551
Adjustments for Non-ASC 606 Revenue	(140)	(165)	(215)
Total Revenue from Contracts with Customers	939	1,096	1,336
Operating Segments | Business | Wholesale | Other
Disaggregation of Revenue [Line Items]
Total Revenue	8	12	51
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	8	12	51
Operating Segments | Business | International and Other
Disaggregation of Revenue [Line Items]
Total Revenue	373	980	1,562
Adjustments for Non-ASC 606 Revenue	(4)	(115)	(176)
Total Revenue from Contracts with Customers	369	865	1,386
Operating Segments | Business | International and Other | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	155	453	761
Adjustments for Non-ASC 606 Revenue	(4)	(115)	(176)
Total Revenue from Contracts with Customers	151	338	585
Operating Segments | Business | International and Other | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	161	266	401
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	161	266	401
Operating Segments | Business | International and Other | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	42	126	210
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	42	126	210
Operating Segments | Business | International and Other | Other
Disaggregation of Revenue [Line Items]
Total Revenue	15	135	190
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	15	135	190
Operating Segments | Mass Markets
Disaggregation of Revenue [Line Items]
Total Revenue	2,745	2,974	4,379
Adjustments for Non-ASC 606 Revenue	(149)	(178)	(353)
Total Revenue from Contracts with Customers	2,596	2,796	4,026
Operating Segments | Mass Markets | Fiber Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	736	637	604
Adjustments for Non-ASC 606 Revenue	(13)	(16)	(18)
Total Revenue from Contracts with Customers	723	621	586
Operating Segments | Mass Markets | Other Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	1,167	1,395	2,163
Adjustments for Non-ASC 606 Revenue	(105)	(126)	(200)
Total Revenue from Contracts with Customers	1,062	1,269	1,963
Operating Segments | Mass Markets | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	842	942	1,612
Adjustments for Non-ASC 606 Revenue	(31)	(36)	(135)
Total Revenue from Contracts with Customers	$ 811	$ 906	$ 1,477