CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 40	$ 194	$ 36	$ 460
Related to marketable securities:
Total	(26)	(3)	(86)	(16)
Related to employee benefit plans:
Total	1	6	2	19
Related to interest rate derivative instruments:
Total	5	2	18	9
Comprehensive Income (Loss)	20	199	(30)	472
Other Comprehensive Income (Loss), Net of Tax	$ (20)	$ 5	$ (66)	$ 12