Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 286	$ 2,145
Other comprehensive income (loss), net of tax (Note 18)
Foreign currency translation adjustments and other	(973)	149
Defined benefit plans	317	36
Other comprehensive income (loss), net of tax	(656)	185
Comprehensive income (loss)	(370)	2,330
Comprehensive loss attributable to noncontrolling interests	20	17
Comprehensive income (loss) attributable to stockholders	$ (350)	$ 2,347