CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 139	$ 40	$ 237	$ 36
Related to marketable securities:
Total	2	(26)	18	(86)
Related to employee benefit plans:
Total	3	1	11	2
Related to interest rate derivative instruments:
Total	0	5	(1)	18
Comprehensive Income (Loss)	144	20	265	(30)
Other Comprehensive Income (Loss), Net of Tax	$ 5	$ (20)	$ 28	$ (66)