Investment Securities - Components of Non-marketable and Other Securities (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Investment Holdings [Line Items]
Investments in qualified affordable housing projects, net	$ 1,306	$ 954
Non-marketable and other equity securities	2,664	2,543
Venture capital and private equity fund investments measured at net asset value | Fair value accounting
Investment Holdings [Line Items]
Nonmarketable securities	147	130
Venture capital and private equity fund investments measured at net asset value | Equity method accounting
Investment Holdings [Line Items]
Nonmarketable securities	605	671
Unconsolidated venture capital and private equity fund investments | Fair value accounting
Investment Holdings [Line Items]
Nonmarketable securities	110	208
Unconsolidated venture capital and private equity fund investments | Equity method accounting
Investment Holdings [Line Items]
Nonmarketable securities	605	671
Other investments | Fair value accounting
Investment Holdings [Line Items]
Nonmarketable securities	183	164
Other investments | Equity method accounting
Investment Holdings [Line Items]
Nonmarketable securities	276	294
Equity securities | Fair value accounting
Investment Holdings [Line Items]
Other equity securities	32	117
Debt funds | Equity method accounting
Investment Holdings [Line Items]
Nonmarketable securities	$ 5	$ 5