XML 63 R52.htm IDEA: XBRL DOCUMENT v3.20.2
Collateralized Transactions (Amounts Related to Collateralized Transactions) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Permitted To Repledge [Member]    
Collateralized Transactions [Line Items]    
Securities lending transactions $ 36,467 $ 31,994
Agreements to resell [1] 29,828 17,185
Customer margin assets 29,490 34,156
Total collateralized transactions 95,785 83,335
Sold Or Repledged [Member]    
Collateralized Transactions [Line Items]    
Securities lending transactions 4,735 3,944
Agreements to resell [1] 29,551 16,627
Customer margin assets 10,220 11,189
Total collateralized transactions $ 44,506 $ 31,760
[1] As of June 30, 2020, $28.5 billion or 96% (as of December 31, 2019, $14.0 billion or 84%) of securities acquired through agreements to resell that are shown as repledged have been deposited in a separate bank account for the exclusive benefit of customers in accordance with SEC Rule 15c3-3.