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Employee Incentive, Retirement, Deferred Compensation, and Career Achievement Plans - Narrative (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) year shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares available for issuance (in shares) \| shares	102
Total unrecognized compensation costs	$ 328
Company's total contribution expense	238	$ 219	$ 233
Deferred compensation liability	$ 283	251
Age of financial consultant when full vesting occurs \| year	60
Years of service when full vesting occurs	10 years
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining weighted-average period for unrecognized compensation cost	7 months 6 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of restricted stock awards vested	$ 295	$ 281	$ 288
Restricted Stock Units Without Performance Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining weighted-average period for unrecognized compensation cost	1 year 7 months 6 days
Restricted Stock Units Without Performance Conditions \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Restricted Stock Units Without Performance Conditions \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining weighted-average period for unrecognized compensation cost	4 months 24 days
Award vesting period	3 years
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares) \| shares	21
Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period from the date of grant in which stock options expire	10 years
Stock Option Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Stock Option Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years