CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net Loss	$ (193)	$ (166)
Other comprehensive income (loss), net of tax
Marketable securities	(6)	9
Employee benefit plans	0	2
Interest rate derivative instruments	3	(6)
Total other comprehensive income (loss), net of tax	(3)	5
Total Comprehensive Loss, Net of Tax	$ (196)	$ (161)