Variable Interest Entities - Carrying Amounts and Classification of Significant Variable Interests (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 13,968	$ 14,586
Non-marketable and other equity securities	2,595	2,543
Accrued interest receivable and other assets	3,523	1,791
Total assets	212,867	211,308
Other liabilities	2,889	2,467
Long-term debt	3,368	2,570
Total liabilities	197,057	194,699
Maximum exposure to loss in unconsolidated VIEs	1,369	1,233
Investments in qualified affordable housing projects, net	1,205	954
Consolidated
Variable Interest Entity [Line Items]
Cash and cash equivalents	7	13
Non-marketable and other equity securities	767	768
Accrued interest receivable and other assets	35	31
Total assets	809	812
Other liabilities	23	18
Long-term debt	0	0
Total liabilities	23	18
Maximum exposure to loss in unconsolidated VIEs	786
Unconsolidated
Variable Interest Entity [Line Items]
Cash and cash equivalents	0	0
Non-marketable and other equity securities	1,369	1,233
Accrued interest receivable and other assets	6	6
Total assets	1,375	1,239
Other liabilities	672	482
Long-term debt	91	90
Total liabilities	763	572
Non-marketable securities | Unconsolidated
Variable Interest Entity [Line Items]
Maximum exposure to loss in unconsolidated VIEs	$ 1,369	$ 1,233