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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net income $ 1,626 $ 1,641
Weighted-average number of shares outstanding:    
Weighted average number of shares - basic (in shares) 601.0 609.2
Weighted average number of shares - diluted (in shares) 601.9 610.2
Earnings per share - basic (in dollars per share) $ 2.71 $ 2.69
Earnings per share - diluted (in dollars per share) $ 2.70 $ 2.69
Stock options excluded as their inclusion would be anti-dilutive (in shares) 0.9 0.5
Stock options    
Weighted-average number of shares outstanding:    
Weighted-average number of shares outstanding, dilutive effect on shares 0.3 0.5
Retention awards    
Weighted-average number of shares outstanding:    
Weighted-average number of shares outstanding, dilutive effect on shares 0.6 0.5