Investment Securities - Net Gains on Non-marketable and Other Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	$ (156)	$ 305	$ (120)	$ 472
Non-marketable securities
Gain (Loss) on Securities [Line Items]
Less: realized net (losses) gains on sales of non-marketable and other equity securities	(10)	61	(29)	127
Net (losses) gains on non-marketable and other equity securities still held	(146)	244	(91)	345
Non-marketable securities | Fair value accounting | Consolidated venture capital and private equity fund investments
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	(51)	19	(48)	36
Non-marketable securities | Fair value accounting | Unconsolidated venture capital and private equity fund investments
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	(22)	15	(19)	32
Non-marketable securities | Fair value accounting | Other investments
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	(4)	(1)	(3)	12
Non-marketable securities | Equity method accounting | Consolidated venture capital and private equity fund investments
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	(67)	250	(8)	295
Non-marketable securities | Equity method accounting | Debt funds
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	0	1	0	2
Non-marketable securities | Equity method accounting | Other investments
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	0	3	2	3
Other equity securities | Fair value accounting
Gain (Loss) on Securities [Line Items]
Total net gains on non-marketable and other equity securities	$ (12)	$ 18	$ (44)	$ 92