XML 63 R51.htm IDEA: XBRL DOCUMENT v3.21.2
Common Equity and Earnings per Share - Additional Information (Detail) - USD ($)
$ in Billions
3 Months Ended 6 Months Ended
Jun. 14, 2021
Jun. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Class of Stock        
Preferred stock, shares issued   0 0 0
Preferred stock, shares outstanding   0 0 0
Jefferies LLC | Sale Agreement        
Class of Stock        
Commission percentage in sales     2.00%  
Class A        
Class of Stock        
Common stock, votes per share     one  
Class A | Jefferies LLC | Sale Agreement        
Class of Stock        
Aggregate offering $ 1.0 $ 0.0 $ 0.0  
Class B Convertible        
Class of Stock        
Common stock, votes per share     10