v3.26.1
LONG-TERM DEBT AND SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Jul. 31, 2026
Jul. 28, 2026
May 31, 2026
Mar. 31, 2025
Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Preferred stock, shares authorized (in shares) 4,400,000     4,400,000   4,400,000          
Preferred stock, liquidation preference (in dollars per share) $ 1,000     $ 1,000              
Common stock, outstanding shares (in shares) 145,939,000     145,939,000   147,653,000          
Common stock, par value (in dollars per share) $ 0.001     $ 0.001   $ 0.001          
Common stock and additional paid in capital $ 1,602     $ 1,602   $ 1,726          
Share repurchase program, authorized amount                 $ 225    
Shares repurchased $ 75 $ 77 $ 0 152 $ 41            
Common stock repurchased (in shares) 1,200,000 1,300,000                  
Shares repurchased (in dollars per share) $ 61.79 $ 60.79                  
Accumulated other comprehensive loss $ 7,681 $ 7,296 6,596 7,681 6,596 7,180       $ 6,327 $ 6,124
Unrealized loss amortization associated with the securities transferred from AFS to HTM 43   47 83 90            
Stock Compensation Plan                      
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Shares repurchased   2                  
Subsequent Event                      
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Share repurchase program, authorized amount             $ 300        
Share repurchase program, increase in authorized amount             $ 75        
Accumulated other comprehensive income (loss)                      
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Accumulated other comprehensive loss $ (1,867) $ (1,935) $ (2,164) $ (1,867) $ (2,164) (1,941)       $ (2,250) $ (2,380)
Series A Preferred Stock                      
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Preferred stock outstanding (in shares) 66,139     66,139              
Fixed-Rate Available For Sale Securities                      
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Unrealized loss amortization associated with the securities transferred from AFS to HTM, before tax       $ 1,500   1,600          
Unrealized loss amortization associated with the securities transferred from AFS to HTM       1,100   $ 1,200          
4.48% Fixed-To-Floating Senior Notes | Senior notes                      
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Debt instrument face amount $ 500     $ 500              
Debt instrument stated interest rate 4.48%     4.48%              
5.24% Fixed-To-Floating Senior Notes | Senior notes | Subsequent Event                      
Accumulated Other Comprehensive Income (Loss) [Line Items]                      
Debt instrument face amount               $ 500      
Debt instrument stated interest rate               5.24%