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Share-Based Incentive Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]        
Stock options vested at end of period, number (in shares) 7,436,347   7,436,347  
Stock options vested at end of period, weighted average exercise price (in dollars per share) $ 137.77   $ 137.77  
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 $ 275   $ 275  
Stock options exercisable at end of period, number (in shares) 5,358,727   5,358,727  
Stock options exercisable at end of period, weighted average exercise price (in dollars per share) $ 128.19   $ 128.19  
Stock options exercisable at end of period, weighted average contractual life remaining (in years)     5 years  
Stock options exercisable at end of period, aggregate intrinsic value $ 244   $ 244  
Total compensation cost recognized in earnings for all share-based incentive compensation awards 47 $ 41 116 $ 100
Tax benefit recognized in the consolidated statement of income (loss) related to compensation costs 8 $ 7 19 $ 17
Total unrecognized compensation cost related to all nonvested share-based incentive compensation awards $ 281   $ 281  
Weighted-average period of recognition for unrecognized compensation cost (in years)     2 years