Revenue Recognition - Revenue by Segment, Sales Channel and Product Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total Revenue	$ 17,478	$ 19,687	$ 20,712
Adjustments for Non-ASC 606 Revenue	(1,370)	(1,892)	(1,915)
Total Revenue from Contracts with Customers	16,108	17,795	18,797
Goods and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	154	138	250
Services performed over time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	15,954	17,657	18,547
Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue	17,478	19,687	20,712
Operating Segments | Business
Disaggregation of Revenue [Line Items]
Total Revenue	13,039	14,119	14,808
Adjustments for Non-ASC 606 Revenue	(1,018)	(1,095)	(1,078)
Total Revenue from Contracts with Customers	12,021	13,024	13,730
Operating Segments | Business | Compute and Application Services
Disaggregation of Revenue [Line Items]
Total Revenue	1,665	1,742	1,735
Adjustments for Non-ASC 606 Revenue	(473)	(530)	(524)
Total Revenue from Contracts with Customers	1,192	1,212	1,211
Operating Segments | Business | IP and Data Services
Disaggregation of Revenue [Line Items]
Total Revenue	5,771	6,207	6,422
Adjustments for Non-ASC 606 Revenue	(4)	(7)	(8)
Total Revenue from Contracts with Customers	5,767	6,200	6,414
Operating Segments | Business | Fiber Infrastructure
Disaggregation of Revenue [Line Items]
Total Revenue	2,152	2,258	2,277
Adjustments for Non-ASC 606 Revenue	(302)	(305)	(286)
Total Revenue from Contracts with Customers	1,850	1,953	1,991
Operating Segments | Business | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	3,451	3,912	4,374
Adjustments for Non-ASC 606 Revenue	(239)	(253)	(260)
Total Revenue from Contracts with Customers	3,212	3,659	4,114
Operating Segments | Business | International and Global Accounts
Disaggregation of Revenue [Line Items]
Total Revenue	3,645	4,083	4,137
Adjustments for Non-ASC 606 Revenue	(363)	(409)	(375)
Total Revenue from Contracts with Customers	3,282	3,674	3,762
Operating Segments | Business | International and Global Accounts | Compute and Application Services
Disaggregation of Revenue [Line Items]
Total Revenue	667	731	759
Adjustments for Non-ASC 606 Revenue	(227)	(279)	(265)
Total Revenue from Contracts with Customers	440	452	494
Operating Segments | Business | International and Global Accounts | IP and Data Services
Disaggregation of Revenue [Line Items]
Total Revenue	1,510	1,716	1,736
Adjustments for Non-ASC 606 Revenue	0	(1)	0
Total Revenue from Contracts with Customers	1,510	1,715	1,736
Operating Segments | Business | International and Global Accounts | Fiber Infrastructure
Disaggregation of Revenue [Line Items]
Total Revenue	830	889	846
Adjustments for Non-ASC 606 Revenue	(136)	(129)	(110)
Total Revenue from Contracts with Customers	694	760	736
Operating Segments | Business | International and Global Accounts | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	638	747	796
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	638	747	796
Operating Segments | Business | Large Enterprise
Disaggregation of Revenue [Line Items]
Total Revenue	3,409	3,771	3,961
Adjustments for Non-ASC 606 Revenue	(106)	(113)	(132)
Total Revenue from Contracts with Customers	3,303	3,658	3,829
Operating Segments | Business | Large Enterprise | Compute and Application Services
Disaggregation of Revenue [Line Items]
Total Revenue	621	696	665
Adjustments for Non-ASC 606 Revenue	(60)	(62)	(82)
Total Revenue from Contracts with Customers	561	634	583
Operating Segments | Business | Large Enterprise | IP and Data Services
Disaggregation of Revenue [Line Items]
Total Revenue	1,517	1,583	1,628
Adjustments for Non-ASC 606 Revenue	0	0	(2)
Total Revenue from Contracts with Customers	1,517	1,583	1,626
Operating Segments | Business | Large Enterprise | Fiber Infrastructure
Disaggregation of Revenue [Line Items]
Total Revenue	478	540	601
Adjustments for Non-ASC 606 Revenue	(46)	(50)	(46)
Total Revenue from Contracts with Customers	432	490	555
Operating Segments | Business | Large Enterprise | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	793	952	1,067
Adjustments for Non-ASC 606 Revenue	0	(1)	(2)
Total Revenue from Contracts with Customers	793	951	1,065
Operating Segments | Business | Mid-Market Enterprise
Disaggregation of Revenue [Line Items]
Total Revenue	2,465	2,649	2,901
Adjustments for Non-ASC 606 Revenue	(40)	(44)	(31)
Total Revenue from Contracts with Customers	2,425	2,605	2,870
Operating Segments | Business | Mid-Market Enterprise | Compute and Application Services
Disaggregation of Revenue [Line Items]
Total Revenue	135	127	127
Adjustments for Non-ASC 606 Revenue	(29)	(30)	(16)
Total Revenue from Contracts with Customers	106	97	111
Operating Segments | Business | Mid-Market Enterprise | IP and Data Services
Disaggregation of Revenue [Line Items]
Total Revenue	1,629	1,710	1,809
Adjustments for Non-ASC 606 Revenue	(4)	(6)	(6)
Total Revenue from Contracts with Customers	1,625	1,704	1,803
Operating Segments | Business | Mid-Market Enterprise | Fiber Infrastructure
Disaggregation of Revenue [Line Items]
Total Revenue	192	207	212
Adjustments for Non-ASC 606 Revenue	(7)	(8)	(9)
Total Revenue from Contracts with Customers	185	199	203
Operating Segments | Business | Mid-Market Enterprise | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	509	605	753
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	509	605	753
Operating Segments | Business | Wholesale
Disaggregation of Revenue [Line Items]
Total Revenue	3,520	3,616	3,809
Adjustments for Non-ASC 606 Revenue	(509)	(529)	(540)
Total Revenue from Contracts with Customers	3,011	3,087	3,269
Operating Segments | Business | Wholesale | Compute and Application Services
Disaggregation of Revenue [Line Items]
Total Revenue	242	188	184
Adjustments for Non-ASC 606 Revenue	(157)	(159)	(161)
Total Revenue from Contracts with Customers	85	29	23
Operating Segments | Business | Wholesale | IP and Data Services
Disaggregation of Revenue [Line Items]
Total Revenue	1,115	1,198	1,249
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	1,115	1,198	1,249
Operating Segments | Business | Wholesale | Fiber Infrastructure
Disaggregation of Revenue [Line Items]
Total Revenue	652	622	618
Adjustments for Non-ASC 606 Revenue	(113)	(118)	(121)
Total Revenue from Contracts with Customers	539	504	497
Operating Segments | Business | Wholesale | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	1,511	1,608	1,758
Adjustments for Non-ASC 606 Revenue	(239)	(252)	(258)
Total Revenue from Contracts with Customers	1,272	1,356	1,500
Operating Segments | Mass Markets
Disaggregation of Revenue [Line Items]
Total Revenue	4,439	5,568	5,904
Adjustments for Non-ASC 606 Revenue	(352)	(797)	(837)
Total Revenue from Contracts with Customers	4,087	4,771	5,067
Operating Segments | Mass Markets | Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	1,672	2,537	2,838
Adjustments for Non-ASC 606 Revenue	(134)	(570)	(601)
Total Revenue from Contracts with Customers	1,538	1,967	2,237
Operating Segments | Mass Markets | Fiber Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	604	524	427
Adjustments for Non-ASC 606 Revenue	(18)	0	0
Total Revenue from Contracts with Customers	586	524	427
Operating Segments | Mass Markets | Other Broadband
Disaggregation of Revenue [Line Items]
Total Revenue	2,163	2,507	2,639
Adjustments for Non-ASC 606 Revenue	(200)	(227)	(236)
Total Revenue from Contracts with Customers	$ 1,963	$ 2,280	$ 2,403