Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income/(Loss)	$ 280	$ (12,385)	$ 4,767
Other comprehensive income/(loss):
Net change in derivative contracts and other	0	(66)	6
Net change in pension and other benefits	1,908	(983)	(170)
Total Other Comprehensive Income/(Loss)	1,908	(1,049)	(164)
Comprehensive Income/(Loss)	$ 2,188	$ (13,434)	$ 4,603