Employee Share-Based Incentives - Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Noncash compensation expense related to employee stock-based incentive plans
Cost of prior grants of RSUs, PSUs and SARs that are amortized over their applicable vesting periods	$ 1,541	$ 1,622	$ 1,510
Accrual of estimated costs of share-based awards to be granted in future periods, predominantly those to full-career eligible employees	2,073	1,882	1,607
Total noncash compensation expense related to employee share-based incentive plans	3,614	$ 3,504	$ 3,117
Compensation cost related to unvested awards not charged to net income	$ 1,000
Weighted-average period for cost expected to be amortized into compensation expense	1 year 7 months 6 days