Commitments, Contingent Liabilities and Guarantees - Summary of Significant Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Commitments to extend credit
Long-term Purchase Commitment
Commitments	$ 80,680	$ 81,570
Letters of credit
Long-term Purchase Commitment
Commitments	1,952	2,095
Forward contracts related to residential mortgage loans measured at fair value
Long-term Purchase Commitment
Commitments	881	650
Capital commitments for private equity investments
Long-term Purchase Commitment
Commitments	219	170
Capital expenditures
Long-term Purchase Commitment
Commitments	80	95
Purchase obligations
Long-term Purchase Commitment
Commitments	$ 27	$ 69