Segment Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Segment Results

The following table summarizes our segment results for the three months ended March 31, 2022 and 2021, based on the segment categorization we were operating under at March 31, 2022.

	Three Months Ended March 31, 2022
	Business		Mass Markets	Total Segments	Operations and Other	Total
	(Dollars in millions)
Revenue	$	3,401	1,275	4,676	—	4,676
Expenses:
Cost of services and products	815		32	847	1,138	1,985
Selling, general and administrative	298		134	432	368	800
Less: stock-based compensation	—		—	—	(23)	(23)
Total expense	1,113		166	1,279	1,483	2,762
Total adjusted EBITDA	$	2,288	1,109	3,397	(1,483)	1,914

	Three Months Ended March 31, 2021
	Business		Mass Markets	Total Segments	Operations and Other	Total
	(Dollars in millions)
Revenue	$	3,595	1,434	5,029	—	5,029
Expenses:
Cost of services and products	884		43	927	1,209	2,136
Selling, general and administrative	304		134	438	318	756
Less: stock-based compensation	—		—	—	(20)	(20)
Total expense	1,188		177	1,365	1,507	2,872
Total adjusted EBITDA	$	2,407	1,257	3,664	(1,507)	2,157

Reconciliation of Operating Profit (Loss) From Segments to Consolidated Net Income

The following table reconciles total segment adjusted EBITDA to net income for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
	2022		2021
	(Dollars in millions)
Total segment adjusted EBITDA	$	3,397	3,664
Depreciation and amortization	(808)		(1,150)
Operations and other expenses	(1,483)		(1,507)
Stock-based compensation	(23)		(20)
Operating income	1,083		987
Total other expense, net	(282)		(355)
Income before income taxes	801		632
Income tax expense	202		157
Net income	$	599	475