XML 61 R40.htm IDEA: XBRL DOCUMENT v3.20.2
Discontinued Operations (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
May 18, 2020
May 15, 2020
Jun. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net proceeds from sale of BlackRock     $ 14,225
Discontinued Operations, Disposed of by Sale | BlackRock, Inc.      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net proceeds from sale of BlackRock   $ 14,200 $ 14,225
Divestiture of business, transaction expenses   200  
Gain (loss) on sale of disposal group   $ 4,300  
Discontinued operations, number of shares contributed 500,000    
Discontinued Operations, Disposed of by Sale | BlackRock, Inc.      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Sale of stock, price per share (in dollars per share)   $ 414.96  
Stock repurchased in period (in shares)   2,650,000  
Registered Secondary Offering | Discontinued Operations, Disposed of by Sale | BlackRock, Inc.      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Sale of stock, number of shares issued in transaction (in shares)   31,600,000  
Sale of stock, price per share (in dollars per share)   $ 420