Revenue Recognition - Revenue by Segment, Sales Channel and Product Category (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,738	$ 4,676
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	3,738	4,676
Adjustments for non-ASC 606 revenue	(276)	(415)
Total revenue from contracts with customers	3,462	4,261
Operating Segments | Business
Disaggregation of Revenue [Line Items]
Total revenue	2,956	3,401
Adjustments for non-ASC 606 revenue	(230)	(275)
Total revenue from contracts with customers	2,726	3,126
Operating Segments | Business | Grow
Disaggregation of Revenue [Line Items]
Total revenue	1,128	1,186
Adjustments for non-ASC 606 revenue	(176)	(205)
Total revenue from contracts with customers	952	981
Operating Segments | Business | Nurture
Disaggregation of Revenue [Line Items]
Total revenue	905	1,093
Adjustments for non-ASC 606 revenue	(6)	(7)
Total revenue from contracts with customers	899	1,086
Operating Segments | Business | Harvest
Disaggregation of Revenue [Line Items]
Total revenue	739	947
Adjustments for non-ASC 606 revenue	(45)	(61)
Total revenue from contracts with customers	694	886
Operating Segments | Business | Other
Disaggregation of Revenue [Line Items]
Total revenue	184	175
Adjustments for non-ASC 606 revenue	(3)	(2)
Total revenue from contracts with customers	181	173
Operating Segments | Business | Large Enterprise
Disaggregation of Revenue [Line Items]
Total revenue	1,194	1,442
Adjustments for non-ASC 606 revenue	(80)	(105)
Total revenue from contracts with customers	1,114	1,337
Operating Segments | Business | Large Enterprise | Grow
Disaggregation of Revenue [Line Items]
Total revenue	550	653
Adjustments for non-ASC 606 revenue	(79)	(103)
Total revenue from contracts with customers	471	550
Operating Segments | Business | Large Enterprise | Nurture
Disaggregation of Revenue [Line Items]
Total revenue	375	454
Adjustments for non-ASC 606 revenue	0	0
Total revenue from contracts with customers	375	454
Operating Segments | Business | Large Enterprise | Harvest
Disaggregation of Revenue [Line Items]
Total revenue	207	276
Adjustments for non-ASC 606 revenue	0	0
Total revenue from contracts with customers	207	276
Operating Segments | Business | Large Enterprise | Other
Disaggregation of Revenue [Line Items]
Total revenue	62	59
Adjustments for non-ASC 606 revenue	(1)	(2)
Total revenue from contracts with customers	61	57
Operating Segments | Business | Mid-Market Enterprise
Disaggregation of Revenue [Line Items]
Total revenue	515	573
Adjustments for non-ASC 606 revenue	(10)	(10)
Total revenue from contracts with customers	505	563
Operating Segments | Business | Mid-Market Enterprise | Grow
Disaggregation of Revenue [Line Items]
Total revenue	196	185
Adjustments for non-ASC 606 revenue	(7)	(8)
Total revenue from contracts with customers	189	177
Operating Segments | Business | Mid-Market Enterprise | Nurture
Disaggregation of Revenue [Line Items]
Total revenue	211	241
Adjustments for non-ASC 606 revenue	0	0
Total revenue from contracts with customers	211	241
Operating Segments | Business | Mid-Market Enterprise | Harvest
Disaggregation of Revenue [Line Items]
Total revenue	100	140
Adjustments for non-ASC 606 revenue	(1)	(2)
Total revenue from contracts with customers	99	138
Operating Segments | Business | Mid-Market Enterprise | Other
Disaggregation of Revenue [Line Items]
Total revenue	8	7
Adjustments for non-ASC 606 revenue	(2)	0
Total revenue from contracts with customers	6	7
Operating Segments | Business | Public Sector
Disaggregation of Revenue [Line Items]
Total revenue	430	479
Adjustments for non-ASC 606 revenue	(19)	(28)
Total revenue from contracts with customers	411	451
Operating Segments | Business | Public Sector | Grow
Disaggregation of Revenue [Line Items]
Total revenue	116	115
Adjustments for non-ASC 606 revenue	(19)	(27)
Total revenue from contracts with customers	97	88
Operating Segments | Business | Public Sector | Nurture
Disaggregation of Revenue [Line Items]
Total revenue	106	131
Adjustments for non-ASC 606 revenue	0	0
Total revenue from contracts with customers	106	131
Operating Segments | Business | Public Sector | Harvest
Disaggregation of Revenue [Line Items]
Total revenue	99	124
Adjustments for non-ASC 606 revenue	0	(1)
Total revenue from contracts with customers	99	123
Operating Segments | Business | Public Sector | Other
Disaggregation of Revenue [Line Items]
Total revenue	109	109
Adjustments for non-ASC 606 revenue	0	0
Total revenue from contracts with customers	109	109
Operating Segments | Business | Wholesale
Disaggregation of Revenue [Line Items]
Total revenue	817	907
Adjustments for non-ASC 606 revenue	(121)	(132)
Total revenue from contracts with customers	696	775
Operating Segments | Business | Wholesale | Grow
Disaggregation of Revenue [Line Items]
Total revenue	266	233
Adjustments for non-ASC 606 revenue	(71)	(67)
Total revenue from contracts with customers	195	166
Operating Segments | Business | Wholesale | Nurture
Disaggregation of Revenue [Line Items]
Total revenue	213	267
Adjustments for non-ASC 606 revenue	(6)	(7)
Total revenue from contracts with customers	207	260
Operating Segments | Business | Wholesale | Harvest
Disaggregation of Revenue [Line Items]
Total revenue	333	407
Adjustments for non-ASC 606 revenue	(44)	(58)
Total revenue from contracts with customers	289	349
Operating Segments | Business | Wholesale | Other
Disaggregation of Revenue [Line Items]
Total revenue	5	0
Adjustments for non-ASC 606 revenue	0	0
Total revenue from contracts with customers	5	0
Operating Segments | Mass Markets
Disaggregation of Revenue [Line Items]
Total revenue	782	1,275
Adjustments for non-ASC 606 revenue	(46)	(140)
Total revenue from contracts with customers	736	1,135
Operating Segments | Mass Markets | Fiber Broadband
Disaggregation of Revenue [Line Items]
Total revenue	152	145
Adjustments for non-ASC 606 revenue	(4)	(5)
Total revenue from contracts with customers	148	140
Operating Segments | Mass Markets | Other Broadband
Disaggregation of Revenue [Line Items]
Total revenue	369	610
Adjustments for non-ASC 606 revenue	(33)	(56)
Total revenue from contracts with customers	336	554
Operating Segments | Mass Markets | Voice and Other
Disaggregation of Revenue [Line Items]
Total revenue	261	520
Adjustments for non-ASC 606 revenue	(9)	(79)
Total revenue from contracts with customers	$ 252	$ 441