Share-Based Compensation Plans - Restricted Share Units Narrative (Details) - Restricted share units (RSUs) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share)	$ 302	$ 279	$ 253
Fair value of RSUs vested during the period	$ 248	$ 216	$ 189
Unamortized deferred compensation	$ 477
Weighted average remaining amortization period (in years)	2 years
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years