Revenue Recognition - Revenue by Segment, Sales Channel and Product Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total Revenue	$ 14,557	$ 17,478	$ 19,687
Adjustments for Non-ASC 606 Revenue	(1,036)	(1,370)	(1,892)
Total Revenue from Contracts with Customers	13,521	16,108	17,795
Goods and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	178	154	138
Services performed over time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	13,343	15,954	17,657
Business
Disaggregation of Revenue [Line Items]
Total Revenue	11,535	13,041	14,119
Mass Markets
Disaggregation of Revenue [Line Items]
Total Revenue	3,022	4,437	5,568
Operating Segments | Business
Disaggregation of Revenue [Line Items]
Total Revenue	11,535	13,041	14,119
Adjustments for Non-ASC 606 Revenue	(858)	(1,018)	(1,095)
Total Revenue from Contracts with Customers	10,677	12,023	13,024
Operating Segments | Business | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	4,469	4,595	4,687
Adjustments for Non-ASC 606 Revenue	(654)	(758)	(819)
Total Revenue from Contracts with Customers	3,815	3,837	3,868
Operating Segments | Business | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	3,465	4,094	4,540
Adjustments for Non-ASC 606 Revenue	(25)	(23)	(25)
Total Revenue from Contracts with Customers	3,440	4,071	4,515
Operating Segments | Business | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	2,785	3,557	4,069
Adjustments for Non-ASC 606 Revenue	(170)	(226)	(240)
Total Revenue from Contracts with Customers	2,615	3,331	3,829
Operating Segments | Business | Other
Disaggregation of Revenue [Line Items]
Total Revenue	816	795	823
Adjustments for Non-ASC 606 Revenue	(9)	(11)	(11)
Total Revenue from Contracts with Customers	807	784	812
Operating Segments | Business | Large Enterprise
Disaggregation of Revenue [Line Items]
Total Revenue	4,616	5,377	5,918
Adjustments for Non-ASC 606 Revenue	(299)	(360)	(434)
Total Revenue from Contracts with Customers	4,317	5,017	5,484
Operating Segments | Business | Large Enterprise | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	2,167	2,415	2,552
Adjustments for Non-ASC 606 Revenue	(294)	(352)	(427)
Total Revenue from Contracts with Customers	1,873	2,063	2,125
Operating Segments | Business | Large Enterprise | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	1,450	1,685	1,906
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	1,450	1,685	1,906
Operating Segments | Business | Large Enterprise | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	760	1,022	1,205
Adjustments for Non-ASC 606 Revenue	0	0	(2)
Total Revenue from Contracts with Customers	760	1,022	1,203
Operating Segments | Business | Large Enterprise | Other
Disaggregation of Revenue [Line Items]
Total Revenue	239	255	255
Adjustments for Non-ASC 606 Revenue	(5)	(8)	(5)
Total Revenue from Contracts with Customers	234	247	250
Operating Segments | Business | Mid-Market Enterprise
Disaggregation of Revenue [Line Items]
Total Revenue	2,011	2,212	2,398
Adjustments for Non-ASC 606 Revenue	(36)	(40)	(40)
Total Revenue from Contracts with Customers	1,975	2,172	2,358
Operating Segments | Business | Mid-Market Enterprise | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	803	757	724
Adjustments for Non-ASC 606 Revenue	(28)	(32)	(29)
Total Revenue from Contracts with Customers	775	725	695
Operating Segments | Business | Mid-Market Enterprise | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	797	915	1,026
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	797	915	1,026
Operating Segments | Business | Mid-Market Enterprise | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	378	510	613
Adjustments for Non-ASC 606 Revenue	(4)	(7)	(7)
Total Revenue from Contracts with Customers	374	503	606
Operating Segments | Business | Mid-Market Enterprise | Other
Disaggregation of Revenue [Line Items]
Total Revenue	33	30	35
Adjustments for Non-ASC 606 Revenue	(4)	(1)	(4)
Total Revenue from Contracts with Customers	29	29	31
Operating Segments | Business | Public Sector
Disaggregation of Revenue [Line Items]
Total Revenue	1,783	1,861	2,111
Adjustments for Non-ASC 606 Revenue	(82)	(109)	(89)
Total Revenue from Contracts with Customers	1,701	1,752	2,022
Operating Segments | Business | Public Sector | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	469	444	481
Adjustments for Non-ASC 606 Revenue	(81)	(103)	(84)
Total Revenue from Contracts with Customers	388	341	397
Operating Segments | Business | Public Sector | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	398	490	528
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	398	490	528
Operating Segments | Business | Public Sector | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	383	468	569
Adjustments for Non-ASC 606 Revenue	(1)	(4)	(3)
Total Revenue from Contracts with Customers	382	464	566
Operating Segments | Business | Public Sector | Other
Disaggregation of Revenue [Line Items]
Total Revenue	533	459	533
Adjustments for Non-ASC 606 Revenue	0	(2)	(2)
Total Revenue from Contracts with Customers	533	457	531
Operating Segments | Business | Wholesale
Disaggregation of Revenue [Line Items]
Total Revenue	3,125	3,591	3,692
Adjustments for Non-ASC 606 Revenue	(441)	(509)	(532)
Total Revenue from Contracts with Customers	2,684	3,082	3,160
Operating Segments | Business | Wholesale | Grow
Disaggregation of Revenue [Line Items]
Total Revenue	1,030	979	930
Adjustments for Non-ASC 606 Revenue	(251)	(271)	(279)
Total Revenue from Contracts with Customers	779	708	651
Operating Segments | Business | Wholesale | Nurture
Disaggregation of Revenue [Line Items]
Total Revenue	820	1,004	1,080
Adjustments for Non-ASC 606 Revenue	(25)	(23)	(25)
Total Revenue from Contracts with Customers	795	981	1,055
Operating Segments | Business | Wholesale | Harvest
Disaggregation of Revenue [Line Items]
Total Revenue	1,264	1,557	1,682
Adjustments for Non-ASC 606 Revenue	(165)	(215)	(228)
Total Revenue from Contracts with Customers	1,099	1,342	1,454
Operating Segments | Business | Wholesale | Other
Disaggregation of Revenue [Line Items]
Total Revenue	11	51	0
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	11	51	0
Operating Segments | Mass Markets
Disaggregation of Revenue [Line Items]
Total Revenue	3,022	4,437	5,568
Adjustments for Non-ASC 606 Revenue	(178)	(352)	(797)
Total Revenue from Contracts with Customers	2,844	4,085	4,771
Operating Segments | Mass Markets | Fiber Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	636	604	524
Adjustments for Non-ASC 606 Revenue	(16)	(18)	0
Total Revenue from Contracts with Customers	620	586	524
Operating Segments | Mass Markets | Other Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	1,394	2,164	2,507
Adjustments for Non-ASC 606 Revenue	(126)	(200)	(227)
Total Revenue from Contracts with Customers	1,268	1,964	2,280
Operating Segments | Mass Markets | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	992	1,669	2,537
Adjustments for Non-ASC 606 Revenue	(36)	(134)	(570)
Total Revenue from Contracts with Customers	$ 956	$ 1,535	$ 1,967