Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 3,174	$ 2,046	$ 1,773
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	(389)	559	148
Gain (loss) related to pension and post-retirement plans	1,229	(784)	(702)
Other comprehensive income (loss), before tax	840	(225)	(554)
Income tax expense (credit) on other comprehensive loss	305	(170)	(146)
Other comprehensive income (loss), net of tax	535	(55)	(408)
Comprehensive income	3,709	1,991	1,365
Less: Comprehensive income attributable to non-controlling interests	31	30	31
Comprehensive income attributable to the Company	$ 3,678	$ 1,961	$ 1,334