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Consolidated Statements Of Changes In Shareholders' Equity - USD ($)
$ in Millions
Total
Common Stock Outstanding [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Other Comprehensive Income (Loss), Net of Deferred Income Taxes [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Cumulative Effect Period Of Adoption Adjustment [Member]
Treasury Shares At Cost [Member]
Balance at Dec. 31, 2019     $ 1 $ 2,220 $ 28 $ 10,307   $ (3,422)
Balance (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2019             $ (4)  
Balance, shares at Dec. 31, 2019   41,000,000            
Issued during the period, net, shares   0            
Treasury shares acquired, shares   (1)            
Issued during the period, net              
Share-based compensation plans       26        
Net increase (decrease) during the period $ 507       507      
Net income (loss) 514         514    
Dividends declared ($6.50 per share 2022, $6.20 per share 2021 and $6.20 per share 2020) (249)         (249)    
Purchase of treasury shares               (200)
Balance at Dec. 31, 2020 9,726   1 2,245 535 10,567   (3,622)
Balance (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2020              
Balance, shares at Dec. 31, 2020   40,000,000            
Issued during the period, net, shares   0            
Treasury shares acquired, shares   (1)            
Issued during the period, net              
Share-based compensation plans       29        
Net increase (decrease) during the period (523)       (523)      
Net income (loss) 1,379         1,379    
Dividends declared ($6.50 per share 2022, $6.20 per share 2021 and $6.20 per share 2020) (247)         (247)    
Purchase of treasury shares               (225)
Balance at Dec. 31, 2021 $ 10,139   1 2,274 12 11,700   (3,847)
Balance (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2021              
Balance, shares at Dec. 31, 2021 69,800,000 39,000,000            
Issued during the period, net, shares   0            
Treasury shares acquired, shares              
Issued during the period, net              
Share-based compensation plans       28        
Net increase (decrease) during the period $ (2,008)       (2,008)      
Net income (loss) 597         597    
Dividends declared ($6.50 per share 2022, $6.20 per share 2021 and $6.20 per share 2020) (255)         (255)    
Purchase of treasury shares               (61)
Balance at Dec. 31, 2022 $ 8,441   $ 1 $ 2,302 $ (1,996) $ 12,042   $ (3,908)
Balance, shares at Dec. 31, 2022 69,900,000 39,000,000