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Share-Based Compensation Plan - Shares Outstanding (Details) - shares
shares in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Total number of share awards    
Beginning balance (in shares) 8,210 6,936
Granted (in shares) 4,067 5,492
Added by performance factor (in shares) 669  
Vested and converted to common shares (in shares) (3,013) (2,922)
Forfeited (in shares) (459) (1,296)
Ending balance (in shares) 9,474 8,210
Minimum    
Total number of share awards    
Payout multiplier 0.00%  
Maximum    
Total number of share awards    
Payout multiplier 200.00%  
Restricted awards    
Total number of share awards    
Beginning balance (in shares) 4,122 3,801
Granted (in shares) 0 2,239
Added by performance factor (in shares) 0  
Vested and converted to common shares (in shares) (1,861) (1,730)
Forfeited (in shares) (168) (188)
Ending balance (in shares) 2,093 4,122
Performance awards    
Total number of share awards    
Beginning balance (in shares) 4,088 3,135
Granted (in shares) 4,067 3,253
Added by performance factor (in shares) 669  
Vested and converted to common shares (in shares) (1,152) (1,192)
Forfeited (in shares) (291) (1,108)
Ending balance (in shares) 7,381 4,088