CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (147)	$ 73	$ (416)	$ 79
Other comprehensive income (loss), net of tax
Marketable securities	(19)	5	(28)	20
Employee benefit plans	1	1	1	5
Interest rate derivative instruments	6	(1)	13	(9)
Total other comprehensive income (loss), net of tax	(12)	5	(14)	16
Total Comprehensive Income (Loss), Net of Tax	$ (159)	$ 78	$ (430)	$ 95