Earnings Per Share - Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share
Net income (loss)	$ (16,098)	$ 71
Less: Net income (loss) attributable to noncontrolling interests	(5,888)	39
Net income (loss) attributable to Baker Hughes Company	$ (10,210)	$ 32
Common Class A
Weighted average shares outstanding:
Class A basic (in shares)	653	515
Class A diluted (in shares)	653	516
Net income (loss) per share attributable to common stockholders:
Class A basic (in dollars per share)	$ (15.64)	$ 0.06
Class A diluted (in dollars per share)	$ (15.64)	$ 0.06