Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions		Sep. 30, 2025	Dec. 31, 2024
Held-to-maturity, fair value		$ 67,346	$ 66,275
Available-for-sale securities	[1]	89,065	85,992
Loans held-for-sale, mortgage loans carried at fair value		2,288	2,251
Time deposits carried at fair value		4,924	5,754
Long-term debt, fair value		$ 1,408	$ 391
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Common stock, authorized (in shares)		4,000,000,000	4,000,000,000
Common stock, issued (in shares)		2,125,725,742	2,125,725,742
Common stock in treasury (in shares)		569,369,470	565,929,654
Fair Value, Measurements, Recurring
Available-for-sale securities		$ 89,065	$ 85,992
Loans held-for-sale, mortgage loans carried at fair value		2,288	2,251
Time deposits carried at fair value		4,924	5,754
Long-term debt, fair value		1,408	391
Level 2 | Fair Value, Measurements, Recurring
Available-for-sale securities		66,710	62,101
Loans held-for-sale, mortgage loans carried at fair value		2,288	2,251
Time deposits carried at fair value		4,924	5,754
Long-term debt, fair value		1,408	391
Asset Pledged as Collateral with Right
Available-for-sale securities		326	320
Trading securities at fair value		$ 2,713	$ 7,501

[1] Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.