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CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Decrease in total equity balance   $ (18,787)
Reduction of non-controlling interest $ (19,271)  
After tax gain (loss) in discontinued operations 2,553  
Baker Hughes    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
After tax gain (loss) in discontinued operations $ 0  
BioPharma    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
After tax gain (loss) in discontinued operations   $ 11,145