Employee Incentive Plans - Narrative (Details) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) employee $ / shares shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2022 $ / shares shares	Dec. 31, 2021 shares
Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining maturity of traded options	1 year
Compensation expense to be recognized	$ 69
Period over which compensation expense will be recognized	2 years
Restricted Stock Grants and Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense to be recognized	$ 203
Period over which compensation expense will be recognized	2 years
Number of employees holding share-based payment awards | employee	8,900
Awards outstanding (in shares) | shares	1,250	1,404	1,535	1,524
SPSs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense to be recognized	$ 64
Period over which compensation expense will be recognized	2 years
Weighted average fair value per share for expense purposes, including the Monte Carlo Factor | $ / shares	$ 377.23	$ 329.11	$ 258.37
Number of employees holding share-based payment awards | employee	600
Awards outstanding (in shares) | shares	601	686	780	860
Performance period	3 years
Minimum | Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Minimum | Restricted Stock Grants and Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Minimum | SPSs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of original shares granted that may be awarded at end of performance period	0.00%
Maximum | Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Award expiration period	10 years
Maximum | Restricted Stock Grants and Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Maximum | SPSs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of original shares granted that may be awarded at end of performance period	200.00%