Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (15,761)	$ 271	$ 283
Less: Net income (loss) attributable to noncontrolling interests	(5,821)	143	88
Net income (loss) attributable to Baker Hughes Company	(9,940)	128	195
Other comprehensive income (loss):
Investment securities	(2)	2	(3)
Foreign currency translation adjustments	175	53	(502)
Cash flow hedges	(5)	12
Cash flow hedges			(4)
Benefit plans	(125)	(75)	(64)
Other comprehensive income (loss)	43	(8)	(573)
Less: Other comprehensive loss attributable to noncontrolling interests	0	(1)	(343)
Other comprehensive income (loss) attributable to Baker Hughes Company	43	(7)	(230)
Comprehensive income (loss)	(15,718)	263	(290)
Less: Comprehensive income (loss) attributable to noncontrolling interests	(5,821)	142	(255)
Comprehensive income (loss) attributable to Baker Hughes Company	$ (9,897)	$ 121	$ (35)