Commitments, Contingent Liabilities and Guarantees - Summary of Significant Commitments (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Commitments to extend credit
Long-term Purchase Commitment
Commitments	$ 86,657	$ 83,437
Letters of credit
Long-term Purchase Commitment
Commitments	2,130	2,009
Forward contracts related to residential mortgage loans held for sale
Long-term Purchase Commitment
Commitments	1,002	1,869
Capital commitments for private equity investments
Long-term Purchase Commitment
Commitments	174	163
Purchase obligations
Long-term Purchase Commitment
Commitments	91	113
Capital expenditures
Long-term Purchase Commitment
Commitments	$ 95	$ 94