Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income/(Loss)	$ 1,318	$ 280	$ (12,385)
Other comprehensive income/(loss):
Net change in pension and other benefits	1,329	1,908	(983)
Net change in other	0	0	(66)
Total Other Comprehensive Income/(Loss)	1,329	1,908	(1,049)
Comprehensive Income/(Loss)	$ 2,647	$ 2,188	$ (13,434)