Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income from continuing and discontinued operations	$ 3,380	$ 5,308	$ 4,112
Pension and postretirement benefit plans adjustments
Net actuarial (loss) gain arising during period	(971)	1,291	3,246
Prior service cost arising during period	(19)	(131)	(59)
Amortization of actuarial (gain) loss and prior service cost	(568)	129	258
Other	(51)	65	23
Pension and postretirement benefit plans adjustments	(1,609)	1,354	3,468
Change in unrealized cash flow hedging	358	(143)	(254)
Foreign currency translation adjustments	562	(1,048)	(647)
Other comprehensive income (loss), before tax	(689)	163	2,567
Income tax expense related to items of other comprehensive income	288	(266)	(748)
Other comprehensive income (loss), net of tax	(401)	(103)	1,819
Comprehensive income	2,979	5,205	5,931
Less: Comprehensive income attributable to noncontrolling interest	185	111	248
Comprehensive income attributable to common shareowners	$ 2,794	$ 5,094	$ 5,683