Collateralized Transactions	12 Months Ended
Dec. 31, 2021
Disclosure Collateralized Transactions [Abstract]
Collateralized Transactions	7. Collateralized Transactions The Company enters into securities borrowing and lending transactions and agreements to repurchase and resell securities to finance trading inventory, to obtain securities for settlement and to earn residual interest rate spreads. In addition, the Company’s customers pledge their securities owned to collateralize margin loans. Under these transactions, the Company either receives or provides collateral, including equity, corporate debt and U.S. government securities. Under typical agreements, the Company is permitted to sell or repledge securities received as collateral and use these securities to secure securities purchased under agreements to resell, enter into securities lending transactions or deliver these securities to counterparties to cover short positions. The Company also engages in securities financing transactions with and for customers through margin lending. Customer receivables generated from margin lending activity are collateralized by customer-owned securities held by the Company. Customers’ required margin levels and established credit limits are monitored continuously by risk management staff using automated systems. Pursuant to the Company’s policy and as enforced by such systems, customers are required to deposit additional collateral or reduce positions, when necessary, to avoid automatic liquidation of their positions. Margin loans are extended to customers on a demand basis and are not committed facilities. Factors considered in the acceptance or rejection of margin loans are the amount of the loan, the degree of leverage being employed in the customer account and an overall evaluation of the customer’s portfolio to ensure proper diversification or, in the case of concentrated positions, appropriate liquidity of the underlying collateral. Additionally, transactions relating to concentrated or restricted positions are limited or prohibited by raising the level of required margin collateral (to 100% in the extreme case). The underlying collateral for margin loans is evaluated with respect to the liquidity of the collateral positions, valuation of securities, volatility analysis and an evaluation of industry concentrations. Adherence to the Company’s collateral policies significantly limits the Company’s credit exposure to margin loans in the event of a customer’s default. Under margin lending agreements, the Company may request additional margin collateral from customers and may sell securities that have not been paid for or purchase securities sold but not delivered from customers, if necessary. As of December 31, 2021 and 2020, approximately $54.9 billion and $39.3 billion, respectively, of customer margin loans were outstanding. The table below presents a summary of the amounts related to collateralized transactions for the periods indicated. December 31, 2021 December 31, 2020 Permitted Sold or Permitted Sold or to Repledge Repledged to Repledge Repledged (in millions)Securities lending transactions $ 69,582 $ 6,192 $ 64,436 $ 4,859Securities purchased under agreements to resell transactions 1 14,715 13,956 23,859 23,832Customer margin assets 65,899 15,936 47,609 14,182 $ 150,196 $ 36,084 $ 135,904 $ 42,873___________________________ (1)As of December 31, 2021, $10.4 billion or 74% (as of December 31, 2020, $23.1 billion or 97%) 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.In the normal course of business, the Company pledges qualified securities with clearing organizations to satisfy daily margin and clearing fund requirements. As of December 31, 2021 and 2020, the majority of the Company’s U.S. and foreign government securities owned were pledged to clearing organizations.The table below presents financial instruments owned and pledged as collateral, including amounts pledged to affiliates, where the counterparty has the right to repledge, for the periods indicated. December 31, 2021 2020 (in millions)Stocks $ 60 $ 53U.S. and foreign government securities 54 33 $ 114 $ 86

Collateralized Transactions

12 Months Ended

Dec. 31, 2021

Disclosure Collateralized Transactions [Abstract]

7. Collateralized Transactions The Company enters into securities borrowing and lending transactions and agreements to repurchase and resell securities to finance trading inventory, to obtain securities for settlement and to earn residual interest rate spreads. In addition, the Company’s customers pledge their securities owned to collateralize margin loans. Under these transactions, the Company either receives or provides collateral, including equity, corporate debt and U.S. government securities. Under typical agreements, the Company is permitted to sell or repledge securities received as collateral and use these securities to secure securities purchased under agreements to resell, enter into securities lending transactions or deliver these securities to counterparties to cover short positions. The Company also engages in securities financing transactions with and for customers through margin lending. Customer receivables generated from margin lending activity are collateralized by customer-owned securities held by the Company. Customers’ required margin levels and established credit limits are monitored continuously by risk management staff using automated systems. Pursuant to the Company’s policy and as enforced by such systems, customers are required to deposit additional collateral or reduce positions, when necessary, to avoid automatic liquidation of their positions. Margin loans are extended to customers on a demand basis and are not committed facilities. Factors considered in the acceptance or rejection of margin loans are the amount of the loan, the degree of leverage being employed in the customer account and an overall evaluation of the customer’s portfolio to ensure proper diversification or, in the case of concentrated positions, appropriate liquidity of the underlying collateral. Additionally, transactions relating to concentrated or restricted positions are limited or prohibited by raising the level of required margin collateral (to 100% in the extreme case). The underlying collateral for margin loans is evaluated with respect to the liquidity of the collateral positions, valuation of securities, volatility analysis and an evaluation of industry concentrations. Adherence to the Company’s collateral policies significantly limits the Company’s credit exposure to margin loans in the event of a customer’s default. Under margin lending agreements, the Company may request additional margin collateral from customers and may sell securities that have not been paid for or purchase securities sold but not delivered from customers, if necessary. As of December 31, 2021 and 2020, approximately $54.9 billion and $39.3 billion, respectively, of customer margin loans were outstanding. The table below presents a summary of the amounts related to collateralized transactions for the periods indicated. December 31, 2021 December 31, 2020 Permitted Sold or Permitted Sold or to Repledge Repledged to Repledge Repledged (in millions)Securities lending transactions $ 69,582 $ 6,192 $ 64,436 $ 4,859Securities purchased under agreements to resell transactions 1 14,715 13,956 23,859 23,832Customer margin assets 65,899 15,936 47,609 14,182 $ 150,196 $ 36,084 $ 135,904 $ 42,873___________________________ (1)As of December 31, 2021, $10.4 billion or 74% (as of December 31, 2020, $23.1 billion or 97%) 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.In the normal course of business, the Company pledges qualified securities with clearing organizations to satisfy daily margin and clearing fund requirements. As of December 31, 2021 and 2020, the majority of the Company’s U.S. and foreign government securities owned were pledged to clearing organizations.The table below presents financial instruments owned and pledged as collateral, including amounts pledged to affiliates, where the counterparty has the right to repledge, for the periods indicated. December 31, 2021 2020 (in millions)Stocks $ 60 $ 53U.S. and foreign government securities 54 33 $ 114 $ 86