Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenue	$ 1,421	$ 1,040	$ 4,273	$ 2,883
Cost of transportation and services (exclusive of depreciation and amortization)	1,137	809	3,408	2,208
Direct operating expense (exclusive of depreciation and amortization)	48	49	143	152
Sales, general and administrative expense	208	149	632	448
Depreciation and amortization expense	26	21	88	54
Transaction and integration costs	5	30	18	38
Restructuring costs	4	2	21	15
Operating loss	(7)	(20)	(37)	(32)
Other expense (income)	(1)	216	1	217
Interest expense, net	9	6	26	22
Loss before income taxes	(15)	(242)	(64)	(271)
Income tax provision (benefit)	(1)	1	(10)	(6)
Net loss	$ (14)	$ (243)	$ (54)	$ (265)
Loss per share
Earnings per share, basic (in dollars per share)	$ (0.08)	$ (1.81)	$ (0.32)	$ (2.15)
Earnings per share, diluted (in dollars per share)	$ (0.08)	$ (1.81)	$ (0.32)	$ (2.15)
Weighted-average common shares outstanding
Basic weighted-average common shares outstanding (in shares)	168,578	134,095	168,377	123,004
Diluted weighted-average common shares outstanding (in shares)	168,578	134,095	168,377	123,004