Consolidated Statement 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) from continuing and discontinued operations	$ 5,308	$ 4,112	$ (3,295)
Pension and postretirement benefit plans adjustments
Net actuarial gain (loss) arising during period	1,291	3,246	(202)
Prior service credit (cost) arising during period	(131)	(59)	2,095
Amortization of actuarial loss and prior service cost	129	258	373
Other	65	23	(51)
Pension and postretirement benefit plans adjustments	1,354	3,468	2,215
Change in unrealized cash flow hedging	(143)	(254)	263
Foreign currency translation adjustments	(1,048)	(647)	609
Other comprehensive income, before tax	163	2,567	3,087
Income tax expense related to items of other comprehensive income	(266)	(748)	(547)
Other comprehensive income (loss), net of tax	(103)	1,819	2,540
Comprehensive income (loss)	5,205	5,931	(755)
Less: Comprehensive income attributable to noncontrolling interest	111	248	224
Comprehensive income (loss) attributable to common shareowners	$ 5,094	$ 5,683	$ (979)