Share-Based Incentive Compensation (Details) - Cost Recognition - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based compensation
Total compensation cost recognized in earnings for all share-based incentive compensation awards	$ 214	$ 183	$ 162
Tax benefit recognized in earnings related to compensation costs	36	31	28
Total unrecognized compensation cost related to all nonvested share-based incentive compensation awards	$ 200
Weighted-average period of recognition for unrecognized compensation cost (in years)	1 year 8 months 12 days
Cash received from the exercise of employee stock options under share-based compensation plans	$ 141	267	293
Tax benefit for tax deductions from employee stock options exercised	$ 11	22	19
Minimum [Member]
Share-based compensation
Estimated annual forfeiture rate reflected in share-based compensation cost (percent)	1.50%
Maximum [Member]
Share-based compensation
Estimated annual forfeiture rate reflected in share-based compensation cost (percent)	3.50%
Performance shares [Member]
Share-based compensation
Estimated attainment of performance shares at grant date (percent)	100.00%
Compensation cost adjustments for the updated estimate of performance shares due to attaining certain performance levels	$ 39	$ 23	$ 12