Commitments, Contingent Liabilities and Guarantees - Summary of Significant Commitments (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Commitments to extend credit
Long-term Purchase Commitment
Commitments	$ 81,206	$ 80,641
Forward contracts related to residential mortgage loans held for sale
Long-term Purchase Commitment
Commitments	2,418	1,952
Letters of credit
Long-term Purchase Commitment
Commitments	2,040	1,953
Capital commitments for private equity investments
Long-term Purchase Commitment
Commitments	163	124
Purchase obligations
Long-term Purchase Commitment
Commitments	124	160
Capital expenditures
Long-term Purchase Commitment
Commitments	$ 103	$ 78