v3.21.2
Divestiture - Gain on sale (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jan. 19, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gain (Loss) on business divestitures, net   $ 0 $ (27) $ 1,684 $ 127
Apparate | Not Discontinued Operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Derecognition of ATG Business' non-controlling interests $ 1,057        
Liability recognized for future obligations (315)        
Net consideration received for sale of the ATG Business 2,019        
Carrying value of net assets transferred (375)        
Gain (Loss) on business divestitures, net 1,644     $ 1,600  
Aurora | Not Discontinued Operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Common shares received 1,277        
Aurora | Apparate | Not Discontinued Operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Common shares received $ 1,300