v3.26.1
Shareholders' Equity - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
May 13, 2026
Equity, Class of Treasury Stock [Line Items]          
Amount repurchased during period $ 341   $ 727 [1]    
Shares repurchased during period (in shares) 16        
Stock repurchased during period, value $ 1 $ 0 $ 47 $ 35  
Cash dividends declared on common shares (in usd per share) $ 0.205 $ 0.205 $ 0.410 $ 0.410  
Scotiabank Investment Agreement          
Equity, Class of Treasury Stock [Line Items]          
Amount repurchased during period $ 49        
Shares repurchased during period (in shares) 2        
2026 Share Repurchase Program          
Equity, Class of Treasury Stock [Line Items]          
Amount authorized to be repurchased         $ 3,000
2025 Share Repurchase Program          
Equity, Class of Treasury Stock [Line Items]          
Amount authorized to be repurchased         $ 1,000
[1] Includes open market repurchases and shares purchased pursuant to the share repurchase agreement with Scotiabank.