Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 4,609	$ 1,318	$ 280
Other comprehensive income:
Net change in pension and other benefits	(44)	1,329	1,908
Total Other Comprehensive (Loss)/Income	(44)	1,329	1,908
Comprehensive Income	$ 4,565	$ 2,647	$ 2,188