Related Party Transactions - Summary of Related Party Transactions (Details) - USD ($) $ in Millions		Mar. 31, 2022		Dec. 31, 2021		Mar. 31, 2021
Assets:
Cash and due from banks	[1]	$ 976		$ 954
Interest bearing deposits with banks	[1]	45,738		47,400
Securities purchased under agreements to resell	[1]	5,759		10,514
Trading assets	[1]	18,761		24,043
Loans	[1]	58,143		55,417
Other	[1]	7,693		5,439
Total assets		177,016	[1]	189,232	[1]	$ 194,856
Liabilities:
Deposits		131,175		143,032		$ 148,582
Trading liabilities	[1]	4,341		3,023
Short-term borrowings	[1]	6,790		6,338
Long-term debt	[1]	15,690		17,236
Other	[1]	2,947		2,411
Total liabilities	[1]	160,943		172,192
Affiliated Entity
Assets:
Cash and due from banks		246		300
Interest bearing deposits with banks		33		59
Securities purchased under agreements to resell		526		594
Trading assets		278		119
Loans		3,438		2,793
Other		350		401
Total assets		4,871		4,266
Liabilities:
Deposits		11,420		9,137
Trading liabilities		1,366		130
Short-term borrowings		502		309
Long-term debt		5,511		5,511
Other		262		277
Total liabilities		$ 19,061		$ 15,364

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at March 31, 2022 and December 31, 2021. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 17, "Variable Interest Entities," for additional information. March 31, 2022December 31, 2021(in millions)AssetsLoans$128 $46 Other assets51 55 Total assets$179 $101 LiabilitiesInterest, taxes and other liabilities$31 $9 Total liabilities$31 $9