Segment Information (Tables)

12 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Schedule of segment information

The following tables summarize our segment results for 2024, 2023 and 2022 based on the segment categorization we were operating under at December 31, 2024.

	Year Ended December 31, 2024
	Business		Mass Markets
	(Dollars in millions)
Segment revenue	$	10,363	2,745
Segment expense
Cost of services and products	3,063		69
Headcount costs	1,237		651
Non-headcount costs	652		572
Total expense	4,952		1,292
Total segment adjusted EBITDA	$	5,411	1,453

	Year Ended December 31, 2023
	Business		Mass Markets
	(Dollars in millions)
Segment revenue	$	11,583	2,974
Segment expense
Cost of services and products	3,248		79
Headcount costs	1,473		768
Non-headcount costs	807		610
Total expense	5,528		1,457
Total segment adjusted EBITDA	$	6,055	1,517

	Year Ended December 31, 2022
	Business		Mass Markets
	(Dollars in millions)
Segment revenue	$	13,099	4,379
Segment expense
Cost of services and products	3,436		121
Headcount costs	1,584		945
Non-headcount costs	879		703
Total expense	5,899		1,769
Total segment adjusted EBITDA	$	7,200	2,610

Schedule of reconciliation from segment income to consolidated net income (loss)

The following table reconciles total segment adjusted EBITDA to net loss for the years ended December 31, 2024, 2023 and 2022:

	Years Ended December 31,
	2024		2023	2022
	(Dollars in millions)
Total segment adjusted EBITDA	$	6,864	7,572	9,810
Depreciation and amortization	(2,956)		(2,985)	(3,239)
Goodwill impairment	—		(10,693)	(3,271)
Other unallocated expense	(3,419)		(3,426)	(3,107)
Stock-based compensation	(29)		(52)	(98)
Operating income (loss)	460		(9,584)	95
Total other expense, net	(690)		(653)	(1,086)
Loss before income taxes	(230)		(10,237)	(991)
Income tax (benefit) expense	(175)		61	557
Net loss	$	(55)	(10,298)	(1,548)