Related Party Transactions - Summary of Related Party Transactions (Details) - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Assets:
Cash and due from banks	[1]	$ 954		$ 1,302
Interest bearing deposits with banks	[1]	47,400		14,353
Securities purchased under agreements to resell	[1]	10,514		35,746
Trading assets	[1]	24,043		27,284
Loans	[1]	55,864		62,088
Other	[1]	5,439		6,084
Total assets		189,232	[1]	196,434	[1]	$ 175,375
Liabilities:
Deposits		143,032		145,150		$ 119,693
Trading liabilities	[1]	3,023		5,397
Short-term borrowings	[1]	6,338		4,952
Long-term debt	[1]	17,236		19,979
Other	[1]	2,411		2,665
Total liabilities	[1]	172,192		178,143
Affiliated Entity
Assets:
Cash and due from banks		300		516
Interest bearing deposits with banks		59		187
Securities purchased under agreements to resell		594		3,941
Trading assets		119		314
Loans		2,793		1,100
Other		401		319
Total assets		4,266		6,377
Liabilities:
Deposits		9,137		15,163
Trading liabilities		130		2,375
Short-term borrowings		309		270
Long-term debt		5,511		2,878
Other		277		268
Total liabilities		$ 15,364		$ 20,954

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31,20212020(in millions)AssetsLoans$46 $10 Other assets55 79 Total assets$101 $89 LiabilitiesInterest, taxes and other liabilities$9 $10 Total liabilities$9 $10