Quarterly report pursuant to Section 13 or 15(d)

Changes in Equity - Additional Information (Details)

v3.21.2
Changes in Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2021
May 03, 2021
Jan. 11, 2021
Class of Stock [Line Items]          
Common stock and sub-share certificates of proprietary interest, par value (in dollars per share) $ 0.01   $ 0.01   $ 0.01
Value of shares authorized to be repurchased       $ 20.0  
Average per share paid amount (in USD per share)     $ 1,433    
Treasury Stock          
Class of Stock [Line Items]          
Repurchases of common stock (in shares) 6,179 1,633 7,812    
Sub shares          
Class of Stock [Line Items]          
Common stock and sub-share certificates of proprietary interest, par value (in dollars per share)         $ 0.0333