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Earnings Per Share - Basic and Diluted Net Income (Loss) per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Earnings Per Share      
Net income (loss) $ (330) $ (15,761) $ 271
Less: Net income (loss) attributable to noncontrolling interests (111) (5,821) 143
Net income (loss) attributable to Baker Hughes Company $ (219) $ (9,940) $ 128
Net income (loss) per share attributable to common stockholders:      
Class A diluted (in dollars per share) $ (0.27) $ (14.73) $ 0.23
Class A Common Stock      
Weighted average shares outstanding:      
Class A basic (in shares) 824 675 555
Class A diluted (in shares) 824 675 557
Net income (loss) per share attributable to common stockholders:      
Class A basic (in dollars per share) $ (0.27) $ (14.73) $ 0.23
Class A diluted (in dollars per share) $ (0.27) $ (14.73) $ 0.23