Commitments, Contingent Liabilities and Guarantees - Summary of Significant Commitments (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Commitments to extend credit
Long-term Purchase Commitment
Commitments	$ 81,093	$ 80,641
Forward contracts related to residential mortgage loans held for sale
Long-term Purchase Commitment
Commitments	2,381	1,952
Letters of credit
Long-term Purchase Commitment
Commitments	2,053	1,953
Capital commitments for private equity investments
Long-term Purchase Commitment
Commitments	136	124
Purchase obligations
Long-term Purchase Commitment
Commitments	135	160
Capital expenditures
Long-term Purchase Commitment
Commitments	$ 82	$ 78