CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net Loss	$ (166)	$ (132)
Other comprehensive income (loss), net of tax
Marketable securities	9	1
Employee benefit plans	2	3
Interest rate derivative instruments	(6)	1
Total other comprehensive income, net of tax	5	5
Total Comprehensive Loss, Net of Tax	$ (161)	$ (127)