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Shareholders' Equity (Narrative) (Details)
 12 Months Ended
Aug. 04, 2022
$ / shares
Dec. 31, 2022
USD ($)
dividend
board_member
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Class of Stock [Line Items]        
Number of quarterly dividends in arrearage before preferred shareholders can elect additional board members | dividend   6    
Number of additional board members the preferred shareholders can elect in the case of an excess arrearage of quarterly dividends | board_member   2    
Amount of preferred dividends in arrears   $ 0    
Affirmative vote of outstanding shares of a series of Preferred Shares required for any material and adverse amendment to the terms of series, percent   66.67%    
Affirmative vote of outstanding shares of all Preferred Shares, voting as a single class, required to issue shares ranking senior to Preferred Shares, percent   66.67%    
Redemption price per share (in USD per share) | $ / shares   $ 25.00    
Number of shares authorized for repurchase (in shares) | shares   35,000,000    
Number of shares repurchased to date | shares   23,700,000    
Shares repurchased pursuant to authorization (in shares) | shares   0 0 0
Common stock dividends paid in aggregate   $ 3,714,000,000 $ 1,402,000,000 $ 1,399,000,000
Distributions to common shareholders and restricted share unitholders (in USD per share) | $ / shares   $ 21.15 $ 8.00 $ 8.00
Preferred share dividends   $ 194,390,000 $ 186,579,000 $ 207,068,000
Special Dividend        
Class of Stock [Line Items]        
Common stock dividends paid in aggregate   $ 2,300,000,000    
Common stock, dividends, per share, cash paid (in USD per share) | $ / shares $ 13.15