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Share-Based Incentive Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]    
Stock options vested at end of period, number (in shares) 6,832,710  
Stock options vested at end of period, weighted average exercise price (in dollars per share) $ 146.39  
Stock options vested at end of period, weighted average contractual life remaining (in years) 6 years  
Stock options vested at end of period, aggregate intrinsic value $ 572  
Stock options exercisable at end of period, number (in shares) 5,162,950  
Stock options exercisable at end of period, weighted average exercise price (in dollars per share) $ 132.57  
Stock options exercisable at end of period, weighted average contractual life remaining (in years) 5 years 1 month 6 days  
Stock options exercisable at end of period, aggregate intrinsic value $ 504  
Total compensation cost recognized in earnings for all share-based incentive compensation awards 79 $ 69
Tax benefit recognized in the consolidated statement of income related to compensation costs 12 $ 11
Total unrecognized compensation cost related to all nonvested share-based incentive compensation awards $ 380  
Weighted-average period of recognition for unrecognized compensation cost (in years) 2 years 2 months 12 days