CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 236	$ 139	$ 324	$ 237
Related to marketable securities:
Total	20	2	25	18
Related to employee benefit plans:
Total	3	3	9	11
Related to interest rate derivative instruments:
Total	(4)	0	(3)	(1)
Comprehensive Income (Loss)	255	144	355	265
Other Comprehensive Income (Loss), Net of Tax	$ 19	$ 5	$ 31	$ 28