Related Party Transactions - Summary of Related Party Transactions (Details) - USD ($) $ in Millions		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Assets:
Cash and due from banks	[1]	$ 704		$ 1,004
Interest bearing deposits with banks	[1]	25,015		17,744
Securities purchased under agreements to resell	[1]	13,878		23,085
Trading assets	[1]	22,115		21,730
Loans, net		58,396	[1]	58,796	[1]	$ 55,417
Other	[1]	6,490		6,754
Total assets		168,238	[1]	164,655	[1]	189,232
Liabilities:
Deposits		121,283	[1]	123,223	[1]	$ 143,032
Trading liabilities	[1]	3,485		2,803
Short-term borrowings	[1]	9,914		5,945
Long-term debt	[1]	18,661		17,591
Other	[1]	3,256		2,980
Total liabilities	[1]	156,599		152,542
Related Party
Assets:
Cash and due from banks		133		313
Interest bearing deposits with banks		90		21
Securities purchased under agreements to resell		406		756
Trading assets		57		20
Loans, net		2,618		3,557
Other		491		744
Total assets		3,795		5,411
Liabilities:
Deposits		9,110		11,357
Trading liabilities		321		110
Short-term borrowings		1,014		1,009
Long-term debt		6,511		6,011
Other		331		326
Total liabilities		$ 17,287		$ 18,813

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2023 and 2022. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31,20232022(in millions)AssetsLoans, net$— $162 Other assets23 44 Total assets$23 $206 LiabilitiesInterest, taxes and other liabilities$17 $22 Total liabilities$17 $22