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Shareholders' Equity - Roll-forward of changes in issued and outstanding common shares (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Billions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Authorized and Issued:      
Common shares authorized 1,800.0    
Common shares, par value per share $ 0.0011 $ 0.0011  
Preferred shares authorized 50.0    
Preferred shares, par value per share $ 0.01    
Common Shares:      
Shares issued, beginning of year 595.6 591.9 588.3
Shares issued [1] 3.1 2.5 2.8
Restricted shares issued, net of cancellations 1.1 1.2 0.8
Shares issued, end of year 599.8 595.6 591.9
Common shares held in treasury, end of year (240.8) (219.2) (218.5)
Common shares outstanding, end of year 359.0 376.4 373.4
Special Cash Dividend      
Special cash dividend declared $ 1.9    
Special cash dividend declared per share (in dollars per share) $ 5.00    
[1] Includes shares issued from the exercise of stock options and stock appreciation rights, the vesting of restricted share units and shares issued from the employee share purchase plan.