CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income	$ 172	$ 220	$ 6	$ 88
Other comprehensive income (loss), net of tax
Marketable securities	6	4	15	5
Employee benefit plans	2	3	4	6
Interest rate derivative instruments	(2)	0	(8)	1
Total other comprehensive income, net of tax	6	7	11	12
Total Comprehensive Income, Net of Tax	$ 178	$ 227	$ 17	$ 100