Condensed Consolidated Statement of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss) from continuing and discontinued operations	$ 298	$ 1,257	$ (3,499)	$ 4,681
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	605	(433)	(175)	(336)
Pension and postretirement benefit plans adjustments	83	(461)	(2,093)	(388)
Change in unrealized cash flow hedging	154	(133)	(5)	(85)
Other Comprehensive Income (Loss), before Tax	842	(1,027)	(2,273)	(809)
Income tax benefit (expense) related to items of other comprehensive income (loss)	(54)	84	535	54
Other comprehensive income (loss), net of tax	788	(943)	(1,738)	(755)
Comprehensive income (loss)	1,086	314	(5,237)	3,926
Less: Comprehensive income attributable to noncontrolling interest	(34)	(91)	(155)	(273)
Comprehensive income (loss) attributable to common shareowners	$ 1,052	$ 223	$ (5,392)	$ 3,653