Annual report pursuant to Section 13 and 15(d)

Equity (Details)

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Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
May 03, 2021
Jan. 11, 2021
Class of Stock [Line Items]                      
Common stock, par value (in dollars per share)     $ 0.01       $ 0.01        
Shares authorized to be repurchased                   $ 20.0  
Average per share paid amount (in dollars per share)             1,346        
Dividend paid per sub-share (in USD per share)     $ 2.75 $ 2.75 $ 2.75 $ 2.75 $ 11.00 $ 10.00 $ 1.75    
Sub shares                      
Class of Stock [Line Items]                      
Common stock, par value (in dollars per share)                     $ 0.0333
Number of shares repurchased and retired (in shares)               0 6,258    
Sub shares | Cash dividend                      
Class of Stock [Line Items]                      
Dividend paid per sub-share (in USD per share)   $ 10.00                  
Sub shares | Special dividend                      
Class of Stock [Line Items]                      
Dividend paid per sub-share (in USD per share) $ 10.00 $ 6.00           $ 16.00      
Treasury Stock                      
Class of Stock [Line Items]                      
Number of shares repurchased and retired (in shares)             14,791