Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income before non-controlling interests	$ 2,046	$ 1,773	$ 1,670
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	559	148	(529)
Loss related to pension and post-retirement plans	(784)	(702)	(91)
Other comprehensive loss, before tax	(225)	(554)	(620)
Income tax credit on other comprehensive loss	(170)	(146)	(30)
Other comprehensive loss, net of tax	(55)	(408)	(590)
Comprehensive income	1,991	1,365	1,080
Less: Comprehensive income attributable to non-controlling interests	30	31	20
Comprehensive income attributable to the Company	$ 1,961	$ 1,334	$ 1,060