Shareholders' Equity - Common Stock Repurchases (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Purchase price of shares repurchased and retired	$ 13,104	$ 4,576	$ 5,073
Common Stock
Class of Stock [Line Items]
Common stock repurchased (in shares)	332	147	126
Common Stock | CCAR Capital Plan Repurchases
Class of Stock [Line Items]
Purchase price of shares repurchased and retired	$ 13,104	$ 4,576	$ 5,073