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Share-based Compensation Plans: Performance Plan Share Units (Details)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance Share Award Payout, Shares of Common Stock Percentage 100.00%  
Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance Share Award Payout, Shares of Common Stock Percentage 50.00%  
Performance Share Award, Percentage of Target 27.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 3 years  
Award vesting period 3 years  
Performance Shares | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance Share Award, Percentage of Target 0.00% 0.00%
Performance Shares | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance Share Award, Percentage of Target 200.00% 200.00%