v3.26.1
Segment Information - Schedule of Segment Results (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenue from External Customer [Line Items]    
Revenues $ 2,899 $ 3,182
Operating expenses    
Cost of services and products related to network expenses 1,435 1,687
Net gain on sale of business (596) 0
Depreciation and amortization 664 713
Total operating expenses 2,297 3,075
OPERATING INCOME 602 107
Total other expense, net (425) (352)
INCOME (LOSS) BEFORE INCOME TAXES 177 (245)
Income tax expense (benefit) 377 (44)
NET LOSS (200) (201)
Reportable Segment    
Revenue from External Customer [Line Items]    
Revenues 2,899 3,182
Operating expenses    
Cost of services and products related to network expenses 837 1,018
Headcount costs 643 619
Non-headcount costs 736 715
Net gain on sale of business (596) 0
Stock-based compensation 13 10
Depreciation and amortization 664 713
Total operating expenses 2,297 3,075
OPERATING INCOME 602 107
Total other expense, net (425) (352)
INCOME (LOSS) BEFORE INCOME TAXES 177 (245)
Income tax expense (benefit) 377 (44)
NET LOSS $ (200) $ (201)