CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 240	$ 139	$ 98	$ (4)
Related to marketable securities:
Total	(5)	(20)	16	(60)
Related to employee benefit plans:
Total	4	0	8	1
Related to interest rate derivative instruments:
Total	1	4	(1)	13
Comprehensive Income (Loss)	240	123	121	(50)
Other Comprehensive Income (Loss), Net of Tax	$ 0	$ (16)	$ 23	$ (46)