Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total Revenue	$ 7,493	$ 7,952	$ 7,933
Adjustments for Non-ASC 606 Revenue	(907)	(959)	(919)
Total Revenue from Contracts with Customers	6,586	6,993	7,014
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	4	13	15
Transferred over Time
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	6,582	6,980	6,999
Compute and Application Services
Disaggregation of Revenue [Line Items]
Total Revenue	1,025	1,141	1,098
Adjustments for Non-ASC 606 Revenue	(445)	(504)	(494)
Total Revenue from Contracts with Customers	580	637	604
IP and Data Services
Disaggregation of Revenue [Line Items]
Total Revenue	3,405	3,555	3,522
Adjustments for Non-ASC 606 Revenue	0	0	0
Total Revenue from Contracts with Customers	3,405	3,555	3,522
Fiber Infrastructure Services
Disaggregation of Revenue [Line Items]
Total Revenue	1,560	1,612	1,507
Adjustments for Non-ASC 606 Revenue	(221)	(220)	(209)
Total Revenue from Contracts with Customers	1,339	1,392	1,298
Voice and Other
Disaggregation of Revenue [Line Items]
Total Revenue	1,276	1,421	1,598
Adjustments for Non-ASC 606 Revenue	(14)	(12)	(8)
Total Revenue from Contracts with Customers	1,262	1,409	1,590
Affiliate Services
Disaggregation of Revenue [Line Items]
Total Revenue	227	223	208
Adjustments for Non-ASC 606 Revenue	(227)	(223)	(208)
Total Revenue from Contracts with Customers	$ 0	$ 0	$ 0