Offsetting [Abstract]
Disaggregation of Gross Securities Lending Transactions [Table]
Disaggregation of Gross Securities Lending Transactions [Table]
Disaggregation of Gross Securities Lending Transactions [Table]
Securd Lending Transaction Type [Axis]
Securd Lending Transaction Type [Axis]
Securd Lending Transaction Type [Axis]
Securd Lending Transaction Type [Domain]
Securd Lending Transaction Type [Domain]
[Domain] for Securd Lending Transaction Type [Axis]
Equity Securities [Member]
Equity Securities [Member]
Exchange-traded Funds [Member]
Exchange Traded Funds [Member]
Closed-end Funds [Member]
Closed-end Funds [Member]
Closed-end Funds [Member]
Other Securities [Member]
Other Securities [Member]
Other securities.
Disaggregation of Gross Securities Lending Transactions [Line Items]
Disaggregation of Gross Securities Lending Transactions [Line Items]
[Line Items] for Disaggregation of Gross Securities Lending Transactions Table Text Block
Deposits received for securities loaned, gross
Securities Loaned, Gross
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents [Table]
Schedule of Cash and Cash Equivalents [Table]
Cash and Cash Equivalents [Axis]
Cash and Cash Equivalents [Axis]
Cash and Cash Equivalents [Domain]
Cash and Cash Equivalents [Domain]
Broker-dealer subsidiaries [Member]
Broker Dealer Subsidiaries [Member]
Broker-dealer subsidiaries.
Corporate [Member]
Corporate Segment [Member]
Trust company subsidiary [Member]
Trust Company Subsidiary [Member]
Trust company subsidiary.
Futures commission merchant and forex dealer member subsidiary [Member]
Futures Commission Merchant and Forex Dealer Member Subsidiary [Member]
Futures Commission Merchant and Forex Dealer Member Subsidiary [Member]
Investment advisory subsidiaries [Member]
Investment Advisory Subsidiaries [Member]
Investment advisory subsidiaries.
Cash and Cash Equivalents [Line Items]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Restricted cash and restricted cash equivalents included in cash and investments segregated and on deposit for regulatory purposes
Restricted Cash and Cash Equivalents
Total cash, cash equivalents, restricted cash and restricted cash equivalents shown in the Condensed Consolidated Statements of Cash Flows
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, by Related Party [Table]
Schedule of Related Party Transactions, by Related Party [Table]
Related Party [Axis]
Related Party [Axis]
Related Party [Domain]
Related Party [Domain]
TD and its affiliates [Member]
Principal Owner [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Assets:
Assets [Abstract]
Receivable from affiliates
Accounts Receivable, Related Parties
Liabilities:
Liabilities [Abstract]
Payable to brokers, dealers and clearing organizations
Payables to Broker-Dealers and Clearing Organizations
Payable to affiliates
Accounts Payable, Related Parties
Regulatory Capital Requirements [Abstract]
Net Capital and Net Capital Requirements for Company's Broker Dealer Subsidiaries [Table]
Net Capital And Net Capital Requirements for Companys Broker Dealer Subsidiaries [Table]
Net Capital and Net Capital Requirements For Company's Broker Dealer Subsidiaries [Table]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
TD Ameritrade Clearing, Inc. [Member]
TD Ameritrade Clearing, Inc [Member]
TD Ameritrade Clearing, Inc.
TD Ameritrade, Inc. [Member]
TD Ameritrade, Inc [Member]
TD Ameritrade, Inc.
TD Ameritrade Futures & Forex LLC [Member]
TD Ameritrade Futures and Forex LLC [Member]
TD Ameritrade Futures & Forex LLC
TD Ameritrade Trust Company [Member]
TD Ameritrade Trust Company [Member]
TD Ameritrade Trust Company [Member]
Net Capital and Net Capital Requirements For Company's Subsidiaries [Line Items]
Net Capital And Net Capital Requirements For Companys Broker Dealer Subsidiaries [Line Items]
Net Capital and Net Capital Requirements For Company's Broker Dealer Subsidiaries [Line Items]
Alternative net capital requirement, dollar amount threshold
Alternative Net Capital Requirement, Greater of Dollar Amount or Percentage of Debit Items, Dollar Amount Threshold
This element represents the specified dollar amount threshold when determining the greater of the specified dollar amount or percentage of aggregate debit items for the calculation of net capital of a broker or dealer that has elected not to be subject to the Aggregate Indebtedness Standard (as defined).
Alternative net capital requirement, percentage of aggregate debit balances
Alternative Net Capital Requirement, Greater of Dollar Amount or Percentage of Debit Items, Percentage of Debit Items
This element represents the percentage of aggregate debit items threshold when determining the greater of the specified dollar amount or percentage of aggregate debit items for the calculation of net capital of a broker or dealer that has elected not to be subject to the Aggregate Indebtedness Standard (as defined).
Alternative net capital requirement, percentage of net capital to aggregate debit balances required for a broker-dealer to repay subordinated borrowings, pay cash dividends, or make any unsecured advances or loans to its parent company or employees
Alternative Net Capital Requirement, Percentage Of Net Capital To Aggregate Debit Balances Required Broker Dealer For Certain Payments
Percentage of net capital to aggregate debit balances required for a broker-dealer to repay subordinated borrowings, pay cash dividends, or make any unsecured advances or loans to its parent company or employees.
Alternative net capital requirement, percentage of net capital to the minimum dollar requirement required for a broker-dealer to repay subordinated borrowings, pay cash dividends, or make any unsecured advances or loans to its parent company or employees
Alternative Net Capital Requirement, Percentage Of Net Capital To Minimum Dollar Requirement Required For Broker Dealer For Certain Payments
Percentage of net capital to the Company's minimum dollar requirement required for a broker-dealer to repay subordinated borrowings, pay cash dividends, or make any unsecured advances or loans to its parent company or employees.
FCM required net capital under the Commodity Exchange Act, dollar amount threshold
FCM Required Net Capital Under Commodity Exchange Act, Greater of Dollar Amount or Percentage of Total Risk Margin Requirement, Dollar Amount Threshold
This element represents the specified dollar amount threshold when determining the greater of the specified dollar amount or percentage of total risk margin requirement for the calculation of minimum adjusted net capital under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act.
FCM required net capital under the Commodity Exchange Act, percentage of total risk margin requirements for all positions carried in client accounts
FCM Required Net Capital Under Commodity Exchange Act, Greater of Dollar Amount or Percentage of Total Risk Margin Requirement, Percentage of Total Risk Margin Requirement, Customer Accounts
This element represents the percentage of total risk margin requirement for all positions carried in customer accounts, which is added to the minimum percentage of total risk margin requirement for all positions carried in non-customer accounts, when determining the greater of the specified dollar amount or percentage of total risk margin requirement for the calculation of minimum adjusted net capital under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act.
FCM required net capital under the Commodity Exchange Act, percentage of total risk margin requirements for all positions carried in non-client accounts
FCM Required Net Capital Under Commodity Exchange Act, Greater of Dollar Amount or Percentage of Total Risk Margin Requirement, Percentage of Total Risk Margin Requirement, Non-Customer Accounts
This element represents the percentage of total risk margin requirement for all positions carried in non-customer accounts, which is added to the minimum percentage of total risk margin requirement for all positions carried in customer accounts, when determining the greater of the specified dollar amount or percentage of total risk margin requirement for the calculation of minimum adjusted net capital under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act.
FDM required net capital under the Commodity Exchange Act, dollar amount threshold
FDM Required Net Capital Under Commodity Exchange Act, Greater of FCM Requirements or Dollar Amount Plus Percentage of Forex Liabilities Owed to Forex Clients in Excess of Ten Million, Dollar Amount
This element represents the specified dollar amount threshold when determining the greater of (a) FCM net capital requirements or (b) the specified dollar amount plus a percentage of foreign exchange liabilities owed to forex clients in excess of $10 million for the calculation of minimum adjusted net capital under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act.
FDM required net capital under the Commodity Exchange Act, percentage of forex liabilities in excess of $10 million added to the dollar amount threshold
FDM Required Net Capital Under Commodity Exchange Act, Greater of FCM Requirements or Dollar Amount Plus Percentage of Forex Liabilities Owed to Forex Clients in Excess of Ten Million, Percentage
This element represents the percentage of foreign exchange liabilities owed to forex clients added to the specified dollar amount when determining the greater of (a) FCM net capital requirements or (b) the specified dollar amount plus a percentage of foreign exchange liabilities owed to forex clients in excess of $10 million for the calculation of minimum adjusted net capital under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act.
FDM required net capital under the Commodity Exchange Act, minimum forex client liability dollar amount threshold
FDM Required Net Capital Under Commodity Exchange Act, Greater of FCM Requirements or Dollar Amount Plus Percentage of Forex Liabilities Owed to Forex Clients in Excess of Ten Million, Ten Million
This element represents the minimum foreign exchange client liability dollar amount threshold of $10 million when determining the greater of (a) FCM net capital requirements or (b) the specified dollar amount plus a percentage of foreign exchange liabilities owed to forex clients in excess of $10 million for the calculation of minimum adjusted net capital under the Commodity Futures Trading Commission's (CFTC) minimum financial requirements, pursuant to the Commodity Exchange Act.
FCM and FDM required net capital under the Commodity Exchange Act, required notice to CFTC, minimum percentage of adjusted net capital to the risk-based capital requirement
FCM and FDM Required Net Capital Under Commodity Exchange Act, Required Notice to CFTC, Minimum Percentage of Net Capital to Risk-Based Capital Requirement
This element represents the minimum allowed percentage of adjusted net capital to the risk-based capital requirement under which an FCM or FDM must otherwise provide notice to the Commodity Futures Trading Commission's (CFTC), pursuant to the Commodity Exchange Act.
FCM and FDM required net capital under the Commodity Exchange Act, required notice to CFTC, minimum percentage of adjusted net capital to the FCM's $1 million threshold
Percentage Net Capital To One Million Minimum Dollar Requirement Required For FCM And FDM To Provide Notice To Regulator
Percentage of net capital to the Company's minimum dollar requirement required for a futures commission merchant to provide notice to its regulator.
FCM and FDM required net capital under the Commodity Exchange Act, required notice to CFTC, minimum percentage of adjusted net capital to the FDM's $20 million plus 5% of foreign exchange liabilities owed to forex clients in excess of $10 million threshold
FCM and FDM Required Net Capital Under Commodity Exchange Act, Required Notice to CFTC, Minimum Percentage of FDM Required Net Capital Thresholds
This element represents the minimum allowed percentage of the adjusted net capital to the specified dollar amount plus a percentage of foreign exchange liabilities owed to forex clients in excess of $10 million required by a FDM who must otherwise provide notice to the Commodity Futures Trading Commission's (CFTC), pursuant to the Commodity Exchange Act.
Tier 1 capital, balance at period end
Tier One Leverage Capital
Amount in excess of required Tier 1 capital
Excess Tier One Leverage Capital
Capital Requirements
Regulatory Capital Requirements Disclosure [Text Block]
Computation of net capital under applicable regulatory requirements
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation
Consolidation, Policy [Policy Text Block]
Recently Adopted & Issued Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Loss Contingencies (ASC) 450
Commitments and Contingencies, Policy [Policy Text Block]
Fair Value Measurement (ASC) 820-10
Fair Value of Financial Instruments, Policy [Policy Text Block]
Revenue Recognition (ASC) 606
Revenue from Contract with Customer [Policy Text Block]
Offsetting Assets and Liabilities
Offsetting Assets And Liabilities [Text Block]
Offsetting Assets And Liabilities [Text Block]
Related Party Transaction [Axis]
Related Party Transaction [Axis]
Related Party Transaction [Domain]
Related Party Transaction [Domain]
Insured Deposit Account Agreement [Member]
Insured Deposit Account Agreement [Member]
Insured deposit account agreement.
Order Routing Agreement [Member]
Order Routing Agreement [Member]
Order Routing Agreement [Member]
Other [Member]
Other Related Parties [Member]
Other related parties.
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Bank Deposit Account Fees [Member]
Bank Deposit Account Fees [Member]
Bank Deposit Account Fees [Member]
Other Revenues [Member]
Other Revenues [Member]
Other Revenues [Member]
Various [Member]
Various [Member]
Various.
Revenues from related parties
Revenue from Related Parties
TD Ameritrade Holding Corporation and TD Ameritrade Clearing, Inc. [Member]
TD Ameritrade Holding Corporation and TD Ameritrade Clearing, Inc. [Member]
TD Ameritrade Holding Corporation and TD Ameritrade Clearing, Inc. [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Senior Revolving Credit Facilities [Member]
Senior Revolving Credit Facilities [Member]
Senior Revolving Credit Facilities [Member]
Management [Member]
Management [Member]
Insured Deposit Account Agreement Fee Example [Member]
Insured Deposit Account Agreement Fee Example [Member]
Insured deposit account agreement fee example.
Debt Issuance Costs [Member]
Debt Issuance Costs [Member]
Debt Issuance Costs [Member]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
New Fixed Rate Notional Investments [Member]
New Fixed Rate Notional Investments [Member]
New Fixed Rate Notional Investments [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum [Member]
Minimum [Member]
Maximum [Member]
Maximum [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Scottrade [Member]
Scottrade Financial Services, Inc. Acquisition [Member]
Scottrade Financial Services, Inc. Acquisition [Member]
Percentage ownership in the Company
Related Party Transaction, Percentage Ownership In Entity
A related party's percentage ownership in the entity.
Number of Board of Directors members, designated by related party
Number of Board of Directors Members, Designated By Related Party
A related party's right to designate a number of directors on the Company's Board of Directors.
Number of Board of Directors members, total
Number of Board of Directors Members
Total number of Board of Directors members of the entity.
Related party transaction, agreement successive renewal term
Related Party Transaction, Agreement Successive Renewal Term
Successive renewal terms for related party agreement.
Related party transaction, non-renewal terms, prior written notice period for termination of related party agreement by any party
Related Party Transaction, Non-Renewal Terms, Prior Written Notice Period For Termination
Prior written notice period for termination of related party agreement by any party.
Number of primary components related to the fee earned on IDA agreement
Insured Deposit Account, Number Of Primary Components Of Fee Earned
Number of primary components of the fee earned related to the Insured Deposit Account.
Reset frequency of adjustments required to adjust variable rate leg of interest rate swaps under current IDA Agreement
Insured Deposit Account, Reset Frequency Of Adjustments Required To Adjust Variable Rate Leg Of Interest Rate Swaps
Reset frequency of adjustments required to adjust variable rate leg of interest rate swaps related to the insured deposit account.
Percentage of fixed rate notional investments
Insured Deposit Account, Percentage Of Fixed Rate Notional Investments
Percentage of fixed rate notional investments related to the insured deposit account.
Percentage of floating rate investments
Insured Deposit Account, Percentage Of Floating Rate Investments
Percentage of floating rate investments related to the insured deposit account.
Designated deposit amount
Insured Deposit Account, Designated Deposit Amount
Designated deposit amount related to the insured deposit account.
Term of deposits invested in fixed rate investments
Insured Deposit Account, Term Of Deposits Invested In Fixed Rate Investments
Term of deposits invested in fixed rate investments related to the insured deposit account.
Term of applicable swaps
Insured Deposit Account, Term Of Applicable Swaps
Term of applicable swaps related to the insured deposit account.
Fixed yield for applicable LIBOR-based swaps
Insured Deposit Account, Rate Of Applicable Swaps
Rate of applicable swaps related to the insured deposit account.
Gross fixed yield earned on deposits
Insured Deposit Account, Gross Fixed Yield Earned
Gross fixed yield earned related to the insured deposit account.
Event one, federal funds effective rate, minimum
Insured Deposit Account, Event One, Federal Funds Effective Rate, Minimum
The minimum federal funds effective rate related to the insured deposit account.
Term of U.S. dollar interest rate swaps
Insured Deposit Account, Term Of US Dollar Interest Rate Swaps
Term of U.S. dollar interest rate swaps related to the insured deposit account.
Event two, minimum rate on five-year U.S. dollar interest rate swaps for 20 consecutive business days
Insured Deposit Account, Event Two, Five Year Us Dollar Interest Rate Swap Rate, Minimum
Minimum rate on five-year U.S. dollar interest rate swaps for 20 consecutive business days related to the insured deposit account.
Event two, number of consecutive business days required above the minimum rate on U.S. dollar interest rate swaps for reduction in rate earned by Company
Insured Deposit Account, Event Two, Number Of Consecutive Business Days Required Above Minimum Rate On Us Dollar Interest Rate Swaps For Reduction In Rate Earned By Company
Number of consecutive business days required above the minimum rate on U.S. dollar interest rate swaps for reduction in rate earned by Company in the case Event 1 and Event 2 are fulfilled related to the insured deposit account.
Percentage used in the calculation to reduce the rate earned by the Company on new fixed-rate notional investments in the case event 1 and event 2 are both fulfilled
Insured Deposit Account, Reduction Rate Used On Excess Of Swap Rate Over US Dollar Interest Rate
Reduction rate used on excess of swap rate over U.S. dollar interest rate swap for 20 consecutive days for reduction in rate earned by Company in the case Event 1 and Event 2 are fulfilled related to the insured deposit account.
Maximum reduction to rate on new fixed-rate notional investments earned by Company in the case event 1 and event 2 are both fulfilled
Insured Deposit Account, Maximum Reduction To Rate On New Fixed Rate Notional Investments Earned By Entity
Maximum reduction to rate on new fixed-rate notional investments earned by the entity in the case event 1 and event 2 are fulfilled.
Deposit amount threshold for floating-rate or fixed-rate notional investments with a maturity of up to 24 months subject to servicing fee adjustment
Insured Deposit Account, Deposit Threshold For Floating Rate Or Short Term Fixed Rate Notional Investments Subject To Servicing Fee Adjustment
Deposit amount threshold for floating-rate or fixed-rate notional investments with a maturity of up to 24 months subject to servicing fee adjustment related to the insured deposit account.
Servicing fee percentage
Insured Deposit Account, Servicing Fee Percentage
Servicing fee percentage related to the insured deposit account.
Maturity of short-term fixed-rate notional investments
Insured Deposit Account, Short Term Fixed Rate Notional Investments Term
Term of short-term fixed-rate notional investments related to the insured deposit account.
Contingent liability carried on the condensed consolidated balance sheets for the Insured Deposit Account Agreement
Guarantor Obligations, Current Carrying Value
Payable to affiliates
Lending commitment received from related party
Lending Commitment Received From Related Party
Lending Commitment Received From Related Party
Expenses to related parties
Related Party Transaction, Expenses from Transactions with Related Party
Income Statement [Abstract]
Revenues:
Revenues [Abstract]
Transaction-based revenues:
Transaction Based Revenues [Abstract]
Revenues generated from client trade execution, consisting primarily of commissions, transaction clearing fees and revenue sharing arrangements with market destinations (also known as "payment for order flow").
Commissions and transaction fees
Brokerage Commissions Revenue
Asset-based revenues:
Asset Based Revenues [Abstract]
Revenues consisting of (1) net interest revenue, (2) insured deposit account fees and (3) investment product fees.
Bank deposit account fees
Bank Deposit Account Fees1
Revenues generated from a sweep program that is offered to eligible clients whereby clients' uninvested cash is swept to FDIC-insured accounts at third-party financial institutions participating in the program.
Net interest revenue
Interest Income (Expense), Net
Investment product fees
Investment Product Fees 2
Revenues earned on fee-based investment balances. Investment product fees include fees earned on money market mutual funds and through Company programs.
Total asset-based revenues
Asset Based Revenues
Asset-based revenues consist of (1) bank deposit account fees, (2) net interest revenue and (3) investment product fees.
Other revenues
Noninterest Income, Other Operating Income
Net revenues
Revenues, Net of Interest Expense
Operating expenses:
Operating Expenses [Abstract]
Employee compensation and benefits
Labor and Related Expense
Clearing and execution costs
Floor Brokerage, Exchange and Clearance Fees
Communications
Communication
Occupancy and equipment costs
Occupancy, Net
Depreciation and amortization
Depreciation
Amortization of acquired intangible assets
Amortization of Intangible Assets
Professional services
Professional Fees
Advertising
Advertising Expense
Other
Other Expenses
Total operating expenses
Operating Expenses
Operating income
Operating Income (Loss)
Other expense (income):
Nonoperating Income (Expense) [Abstract]
Interest on borrowings
Interest Expense, Debt
Loss on sale of investments
Debt Securities, Available-for-sale, Gain (Loss)
Other
Other Nonoperating Income (Expense)
Total other expense (income)
Nonoperating Income (Expense)
Pre-tax income
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Provision for income taxes
Income Tax Expense (Benefit)
Net income
Net Income (Loss) Attributable to Parent
Earnings per share - basic (in USD per share)
Earnings Per Share, Basic
Earnings per share - diluted (in USD per share)
Earnings Per Share, Diluted
Weighted average shares outstanding - basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Weighted average shares outstanding - diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Dividends declared per share (in USD per share)
Common Stock, Dividends, Per Share, Declared
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
Severance Pay and Other Termination Benefits [Member]
Employee Severance and Other Termination Benefits [Member]
Employee Severance and Other Termination Benefits [Member]
Contract Termination and Other Costs [Member]
Contract Termination and Other Costs [Member]
Termination of a contract associated with exit from or disposal of business activities or restructurings pursuant to a plan and other exit costs.
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve [Roll Forward]
Restructuring Reserve [Roll Forward]
Beginning balance
Restructuring Reserve
Exit liabilities assumed - post closing adjustments
Restructuring Charges, Exit Liabilities Assumed in Business Combination, Post Closing Adjustments
Amount of post closing adjustments recorded related to expenses associated with exit or disposal activities assumed in a business combination.
Costs incurred and charged to expense
Restructuring Charges
Costs paid or otherwise settled
Payments for Restructuring
Ending balance
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Debt Disclosure [Abstract]
Long-term Debt and Other Borrowings
Debt Disclosure [Text Block]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss
Comprehensive Income (Loss) Note [Text Block]
Restricted Cash and Investments [Abstract]
Restrictions on Cash and Cash Equivalents [Table]
Restrictions on Cash and Cash Equivalents [Table]
Restricted Cash and Cash Equivalents [Axis]
Restricted Cash and Cash Equivalents [Axis]
Cash in demand deposit accounts [Member]
Demand Deposits [Member]
U.S. government debt securities [Member]
US Government Debt Securities [Member]
U.S. government agency mortgage-backed securities [Member]
US Government Agencies Debt Securities, Mortgage-backed Securities [Member]
Mortgage-backed securities issued by US government agencies, for example, but not limited to, Government National Mortgage Association (GNMA or Ginnie Mae). Excludes mortgage-backed securities issued by US government-sponsored Enterprises (GSEs), for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB).
Reverse repurchase agreements (collateralized by U.S. government debt securities) [Member]
Reverse Repurchase Agreements [Member]
Reverse repurchase agreements
Cash on deposit with futures commission merchants [Member]
Cash On Deposit With Futures Commission Merchant [Member]
Cash On Deposit With Futures Commission Merchant [Member]
U.S. government debt securities on deposit with futures commission merchant [Member]
Us Government Debt Securities On Deposit With Futures Commission Merchant [Member]
Us government debt securities on deposit with futures commission merchant
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and investments segregated and on deposit for regulatory purposes
Cash and Securities Segregated under Federal and Other Regulations
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Offsetting Assets And Liabilities [Table]
Offsetting Assets And Liabilities [Table]
Offsetting Assets And Liabilities [Table]
Transaction Type [Axis]
Transaction Type [Axis]
Transaction [Domain]
Transaction [Domain]
Transacted Through the Option Clearing Corporation [Member]
Transacted Through The Option Clearing Corporation [Member]
Transacted Through The Option Clearing Corporation [Member]
Offsetting Assets And Liabilities [Line Items]
Offsetting Assets And Liabilities [Line Items]
Offsetting Assets And Liabilities [Line Items]
Gross amounts of deposits paid for securities borrowed
Deposits Paid for Securities Borrowed, at Carrying Value
Gross amounts of deposits received for securities loaned
Deposits Received for Securities Loaned, at Carrying Value
Fair value of collateral the Company has received under enforceable master agreements
Fair Value Of Collateral Received
Fair Value Of Collateral Received
Fair value of collateral the Company has pledged under enforceable master agreements
Fair Value Of Collateral Pledged
Fair Value Of Collateral Pledged
Statement of Financial Position [Abstract]
Securities pledged as collateral for repurchase agreements
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Preferred stock, shares authorized (in shares)
Preferred Stock, Shares Authorized
Preferred stock, shares issued (in shares)
Preferred Stock, Shares Issued
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Common stock, shares issued (in shares)
Common Stock, Shares, Issued
Common stock, shares outstanding (in shares)
Common Stock, Shares, Outstanding
Treasury stock, shares (in shares)
Treasury Stock, Shares
Revenue from Contract with Customer [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Contract with Customer, Asset and Liability
Contract with Customer, Asset and Liability [Table Text Block]
Earnings Per Share [Abstract]
Earnings Per Share
Earnings Per Share [Text Block]
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
ASU 2016-18 [Member]
Accounting Standards Update 2016-18 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in cash flows from operating activities
Net Cash Provided by (Used in) Operating Activities
Net Capital and Net Capital Requirements for Company's Broker-dealer Subsidiaries
Computation of Net Capital under Securities and Exchange Commission Regulation [Table Text Block]
Adjusted Net Capital and Adjusted Net Capital Requirements for Company's FCM and FDM Subsidiary
Minimum Financial Requirements for Futures Commission Merchants and Forex Dealer Members under Commodity Exchange Act [Table Text Block]
Tabular disclosure of minimum financial requirements for commodities brokers, known as futures commission merchants (FCMs) and forex dealer members (FDMs) including the risk-based requirement, and the amount of adjusted net capital required by a registered futures association of which it is a member.
2019 Remaining
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year
2020
Long-term Debt, Maturities, Repayments of Principal in Year Two
2021
Long-term Debt, Maturities, Repayments of Principal in Year Three
2022
Long-term Debt, Maturities, Repayments of Principal in Year Four
2023
Long-term Debt, Maturities, Repayments of Principal in Year Five
Thereafter
Long-term Debt, Maturities, Repayments of Principal after Year Five
Total
Debt Instrument, Face Amount, Maturities Table, Total
Face (par) amount of debt instruments at time of issuance for those debt instruments disclosed in the fiscal year maturities table.
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Mutual Fund Service Fees [Member]
Mutual Fund Service Fees [Member]
Mutual Fund Service Fees [Member]
Investment Program Fees [Member]
Investment Program Fees [Member]
Investment Program Fees [Member]
Other Investment Product Fees [Member]
Other Investment Product Fees [Member]
Other Investment Product Fees [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
% Change
Investment Product Fees, Percent Change
Investment Product Fees, Percent Change
Gain (loss) on fair value of interest rate swaps
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments
Gain (loss) on fair value of hedged fixed-rate debt
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge
Net gain (loss) recorded in interest on borrowings
Gain (Loss) on Fair Value Hedges Recognized in Earnings
Cash Deposited With And Securities Pledged To Clearinghouses [Table]
Cash Deposited With And Securities Pledged To Clearinghouses [Table]
Cash Deposited With And Securities Pledged To Clearinghouses [Table]
Financial Instrument [Axis]
Financial Instrument [Axis]
Financial Instruments [Domain]
Financial Instruments [Domain]
Cash [Member]
Cash [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Receivable from brokers, dealers and clearing organizations [Member]
Receivable From Brokers Dealers And Clearing Organizations [Member]
Receivable From Brokers Dealers And Clearing Organizations [Member]
Securities owned, at fair value [Member]
Securities Owned [Member]
Securities owned.
Cash Deposited with and Securities Pledged to Clearinghouses [Line Items]
Cash Deposited With And Securities Pledged To Clearinghouses [Line Items]
Cash Deposited with and Securities Pledged to Clearinghouses [Line Items]
Cash deposited and securities pledged
Cash Deposited With And Securities Pledged To Clearinghouses
Cash Deposited With And Securities Pledged To Clearinghouses
Exit liabilities recorded during the period
Capitalized Contract Cost [Table]
Capitalized Contract Cost [Table]
Receivable Type [Axis]
Receivable Type [Axis]
Receivable [Domain]
Receivable [Domain]
Receivable From Clients [Member]
Receivable From Clients [Member]
Receivable From Clients [Member]
Receivable From Affiliates [Member]
Receivable From Affiliates [Member]
Receivable From Affiliates [Member]
Other Receivables [Member]
Other Receivables [Member]
Other Receivables [Member]
Capitalized Contract Cost [Line Items]
Capitalized Contract Cost [Line Items]
Contract With Customer, Balance [Roll Forward]
Contract With Customer, Balance [Roll Forward]
Contract With Customer, Balance [Roll Forward]
Opening balance, October 1, 2018
Contract with Customer, Asset, Net
Closing balance, March 31, 2019
Increase
Increase (Decrease) in Contract with Customer, Asset
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Domain]
Short-term Debt, Type [Domain]
Securities Sold Under Agreements to Repurchase [Member]
Securities Sold under Agreements to Repurchase [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Senior Notes [Member]
Senior Notes [Member]
5.600% Notes due 2019 [Member]
Senior Notes Due 2019 [Member]
Senior Notes Due 2019 [Member]
Variable-rate Notes due 2021 [Member]
Senior Notes Due 2021 [Member]
Senior Notes Due 2021 [Member]
2.950% Notes due 2022 [Member]
Senior Notes Due 2022 [Member]
Senior Notes Due 2022 [Member]
3.75% Notes due 2024 [Member]
Senior Notes Due 2024 [Member]
Senior Notes Due 2024 [Member]
3.625% Notes due 2025 [Member]
Senior Notes Due 2025 [Member]
Senior Notes due 2025 [Member]
3.300% Notes due 2027 [Member]
Senior Notes Due 2027 [Member]
Senior Notes Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Face Value
Debt Instrument, Face Amount
Unamortized Discounts and Debt Issuance Costs
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Fair Value Adjustment
Derivative Instruments in Hedges, at Fair Value, Net
Net Carrying Value
Debt, Long-term and Short-term, Combined Amount
Interest rate, stated percentage
Debt Instrument, Interest Rate, Stated Percentage
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Treasury Stock [Member]
Deferred Compensation [Member]
Deferred Compensation [Member]
Deferred Compensation [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, value
Stockholders' Equity Attributable to Parent
Beginning balance (in shares)
Net income
Other comprehensive income, net of tax
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Payment of cash dividends
Dividends, Common Stock, Cash
Repurchases of common stock
Treasury Stock, Value, Acquired, Cost Method
Repurchases of common stock (in shares)
Treasury Stock, Shares, Acquired
Future treasury stock purchases under accelerated stock repurchase agreement
Treasury Stock, Future Purchases Under Accelerated Stock Repurchase Agreement
Treasury Stock, Future Purchases Under Accelerated Stock Repurchase Agreement
Repurchases of common stock for income tax withholding on stock-based compensation
Income Tax Withholding For Share Based Compensation
Value of shares withheld for income taxes for Share Based Compensation
Common stock issued for stock-based compensation, including tax effects
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures
Common stock issued for stock-based compensation, including tax effects (in shares)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures
Deferred compensation
Stock Issued During Period, Value, Deferred Compensation
Value of common stock issued to a trust (for example, but not limited to, rabbi trust) set up specifically to accumulate stock for the sole purpose of distribution to participating employees.
Stock-based compensation
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Adoption of Accounting Standards Update 2014-09 (Note 15)
Cumulative Effect of New Accounting Principle in Period of Adoption
Ending balance, value
Ending balance (in shares)
ASSETS
Receivable from brokers, dealers and clearing organizations
Receivables from Brokers-Dealers and Clearing Organizations
Receivable from clients, net
Receivables from Customers
Other receivables, net
Other Receivables
Securities owned, at fair value
Financial Instruments, Owned, at Fair Value
Investments available-for-sale, at fair value (including $98 million of securities pledged as collateral for repurchase agreements at September 30, 2018)
Debt Securities, Available-for-sale
Property and equipment at cost, net
Property, Plant and Equipment, Net
Goodwill
Goodwill
Acquired intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Other assets
Other Assets
Total assets
Assets
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Payable to clients
Payables to Customers
Accounts payable and other liabilities
Accounts Payable and Accrued Liabilities
Other borrowings
Other Borrowings
Long-term debt
Long-term Debt
Deferred income taxes
Deferred Income Tax Liabilities, Net
Total liabilities
Liabilities
Stockholders' equity:
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, $0.01 par value; 100 million shares authorized, none issued
Preferred Stock, Value, Issued
Common stock, $0.01 par value; one billion shares authorized; 670 million shares issued; March 31, 2019 – 554 million shares outstanding; September 30, 2018 – 563 million shares outstanding
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital
Retained earnings
Retained Earnings (Accumulated Deficit)
Treasury stock, common, at cost: March 31, 2019 – 116 million shares; September 30, 2018 – 107 million shares
Treasury Stock, Value
Deferred compensation
Deferred Compensation
Value of common stock issue to a trust (for example, but not limited to, rabbi trust) set up specifically to accumulate stock for the sole purpose of distribution to participating employees.
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total stockholders' equity
Total liabilities and stockholders' equity
Liabilities and Equity
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Pay Variable Interest Rate Swap [Member]
Pay Variable Interest Rate Swap [Member]
Pay Variable Interest Rate Swap [Member]
Other assets [Member]
Other Assets [Member]
Accounts payable and other liabilities [Member]
Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Fair value of outstanding derivative assets designated as hedging instruments in the Consolidated Balance Sheets
Interest Rate Fair Value Hedge Asset at Fair Value
Fair value of outstanding derivative liabilities designated as hedging instruments in the Consolidated Balance Sheets
Interest Rate Fair Value Hedge Liability at Fair Value
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition [Domain]
Initial Application Period Cumulative Effect Transition [Domain]
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Accounting Standards Update 2014-09 [Member]
Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Provision for income taxes
Effect of Rights of Setoff Associated with Company's Recognized Assets and Liabilities
Offsetting Assets And Liabilities [Table Text Block]
Offsetting Assets and Liabilities Table Text Block
Disaggregation of Gross Secured Lending Transactions
Disaggregation of Gross Secured Lending Transactions [Table Text Block]
Disaggregation of Gross Secured Lending Transactions [Table Text Block]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Investments Available-for-sale [Member]
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Cash Flow Hedging Instruments [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications
OCI, before Reclassifications, Net of Tax, Attributable to Parent
Amounts reclassified from accumulated other comprehensive loss
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent
Current period change
Basis of Presentation
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Fair Value Disclosures [Abstract]
Fair Value Hierarchy for Assets and Liabilities Measured on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss), before tax:
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Investments available-for-sale:
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax [Abstract]
Unrealized gain (loss)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax
Reclassification adjustment for realized loss included in net income
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax
Net change in investments available-for-sale
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent
Cash flow hedging instruments:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Reclassification adjustment for portion of realized loss amortized to net income
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax
Total other comprehensive income (loss), before tax
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent
Income tax effect
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent
Total other comprehensive income (loss), net of tax
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Document And Entity Information [Abstract]
Document and entity information.
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Small Business
Entity Small Business
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Contract Termination and Other Costs [Member]
Employee Compensation and Benefits [Member]
Employee Compensation and Benefits [Member]
Employee Compensation and Benefits [Member]
Clearing And Execution Costs [Member]
Clearing And Execution Costs [Member]
Clearing And Execution Costs [Member]
Communications [Member]
Communications [Member]
Primary financial statement concept encompassing the amount of expense incurred in the period for communication, which is the exchange of information by several methods.
Occupancy and Equipment Costs [Member]
Occupancy and Equipment Costs [Member]
Primary financial statement caption encompassing occupancy and equipment costs that may include items such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense.
Professional Services [Member]
Professional Services [Member]
Professional services.
Other Operating Expense [Member]
Other Operating Income (Expense) [Member]
Other Non-operating Expense [Member]
Other Nonoperating Income (Expense) [Member]
Exit liabilities assumed in business acquisition
Restructuring And Related Cost, Cumulative Exit Liabilities Assumed In Business Acquisition
Cumulative amount of acquisition-related exit liabilities assumed in a business acquisition.
Cumulative acquisition-related exit costs incurred since the date of acquisition
Restructuring and Related Cost, Cumulative Incurred Cost
Cumulative amount of acquisition-related exit costs charged to expense since the date of acquisition.
Total cumulative exit liabilities assumed and acquisition-related exit costs incurred
Restructuring And Related Cost, Cumulative Exit Liabilities Assumed And Incurred Cost
Cumulative amount of exit liabilities assumed and acquisition-related exit costs incurred (by type and in total) in a business acquisition.
Customer Securities for which Entity has Right to Sell or Repledge [Table]
Customer Securities for which Entity has Right to Sell or Repledge [Table]
Customer Securities for which Entity has Right to Sell or Repledge [Axis]
Customer Securities for which Entity has Right to Sell or Repledge [Axis]
Customer Securities for which Entity has Right to Sell or Repledge, Securities Type [Domain]
Customer Securities for which Entity has Right to Sell or Repledge, Securities Type [Domain]
Client Margin Securities [Member]
Client Margin Securities [Member]
Client Margin Securities [Member]
Stock Borrowings [Member]
Stock Borrowings [Member]
Stock Borrowings [Member]
Customer Securities for which Entity has Right to Sell or Repledge (Including Securities Sold or Repledged) [Line Items]
Customer Securities for which Entity has Right to Sell or Repledge (Including Securities Sold or Repledged) [Line Items]
Total collateral available
Customer Securities for which Entity has Right to Sell or Repledge, Fair Value
Collateral loaned
Customer Securities For Which Entity Has Right To Sell Or Repledge, Fair Value of Securities Sold Or Repledged, Securities Loaned
Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it has loaned to counterparties as collateral.
Collateral repledged
Customer Securities For Which Entity Has Right To Sell Or Repledge, Fair Value of Securities Sold Or Repledged, Securities Repledged
Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it has re-pledged to counterparties as collateral.
Total collateral loaned or repledged
Customer Securities for which Entity has Right to Sell or Repledge, Fair Value of Securities Sold or Repledged
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Recurring [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
Money Market Mutual Funds [Member]
Money Market Funds [Member]
U.S. Government Debt Securities [Member]
U.S. Government Agency Mortgage-Backed Securities [Member]
Auction Rate Securities [Member]
Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets:
Assets, Fair Value Disclosure [Abstract]
Cash equivalents
Cash and Cash Equivalents, Fair Value Disclosure
Investments segregated for regulatory purposes
Cash and Securities Segregated under Federal and Other Regulations, Fair Value Disclosure
Fair value portion of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers).
Securities owned
Investments available-for-sale
Other assets
Other Assets, Fair Value Disclosure
Total assets at fair value
Assets, Fair Value Disclosure
Liabilities:
Liabilities, Fair Value Disclosure [Abstract]
Accounts payable and other liabilities
Accounts Payable and Accrued Liabilities, Fair Value Disclosure
Summary of Cash and Cash Equivalents
Schedule of Cash and Cash Equivalents [Table Text Block]
Reconciliation of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Restrictions on Cash and Cash Equivalents [Table Text Block]
Antidilutive awards excluded from the calculation of diluted earnings per share (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Schedule of Long-term Debt and Other Borrowings
Schedule of Long-term and Short-term Debt Instruments [Table Text Block]
Tabular disclosure of long-debt and short-term instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation.
Schedule of Maturities of Long-term Debt
Schedule of Maturities of Long-term Debt [Table Text Block]
Schedule of Gains and Losses Resulting from Changes in Fair Value of Interest Rate Swaps and Hedged Fixed Rate Debt
Gains And Losses Resulting From Changes In Fair Value Of Interest Rate Swaps And Hedged Fixed Rate Debt Table [Text Block]
Gains and losses resulting from changes in fair value of interest rate swaps and hedged fixed rate debt.
Schedule of Fair Value of Outstanding Derivatives Designated as Hedging Instruments in the Condensed Consolidated Balance Sheets
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Schedule of Debt
Schedule of Debt [Table Text Block]
Accelerated Stock Repurchase [Abstract]
Accelerated Stock Repurchase [Abstract]
Accelerated Stock Repurchase Agreements
Accelerated Stock Repurchase Agreement [Text Block]
Entire disclosure for the accelerated stock repurchase agreement.
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Committed Intercompany Credit Facility [Member]
Committed Intercompany Credit Facility [Member]
Committed Intercompany Credit Facility [Member]
Uncommitted Intercompany Credit Facility [Member]
Uncommitted Intercompany Credit Facility [Member]
Uncommitted Intercompany Credit Facility [Member]
Credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Reverse repurchase agreements, general maturity
Reverse Repurchase Agreements, General Maturity
General maturity of reverse repurchase agreements in days.
Long-term debt, aggregate estimated fair value
Debt Instrument, Fair Value Disclosure
Long-term debt, aggregate carrying value
Schedule of Other Comprehensive Income (Loss)
Comprehensive Income (Loss) [Table Text Block]
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Federal Funds Rate Loans [Member]
Federal Funds Rate Loans [Member]
Federal Funds Rate Loans [Member]
ABR Loans [Member]
ABR Loans [Member]
ABR Loans [Member]
Eurodollar Loans [Member]
Eurodollar Loans [Member]
Eurodollar Loans [Member]
Revolving Facility, 600 Million Dollars [Member]
Revolving Facility, 600 Million Dollars [Member]
Revolving Facility, 600 Million Dollars [Member]
Revolving Facility, 850 Million Dollars [Member]
Revolving Facility, 850 Million Dollars [Member]
Revolving Facility, 850 Million Dollars [Member]
TDAC Eurodollar Loans [Member]
TDAC Eurodollar Loans [Member]
TDAC Eurodollar Loans [Member]
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
Parent Company [Member]
Parent Company [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Federal Funds Effective Swap Rate [Member]
Federal Funds Effective Swap Rate [Member]
Eurodollar [Member]
Eurodollar [Member]
LIBOR [Member]
London Interbank Offered Rate (LIBOR) [Member]
Revolving Credit Facility [Member]
Revolving Credit Facility [Member]
Intercompany Credit Facility [Member]
Intercompany Credit Facility [Member]
Intercompany Credit Facility [Member]
Debt instrument, basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Credit facility, commitment fee percentage
Line of Credit Facility, Commitment Fee Percentage
Borrowings outstanding
Notes Payable
Number of credit facilities
Debt Instrument, Number Of Credit Facilities
Debt Instrument, Number Of Credit Facilities
Commissions [Member]
Commissions [Member]
Commissions [Member]
Order Routing Revenue [Member]
Order Routing Revenue [Member]
Order Routing Revenue [Member]
Other Transaction-Based Revenues [Member]
Other Transaction-Based Revenues [Member]
Other Transaction-Based Revenues [Member]
Transaction-based revenues
Brokerage Commissions Revenue, Percent Change
Brokerage Commissions Revenue, Percent Change
Bank deposit account fees
Bank Deposit Account Fees, Percent Change
Bank Deposit Account Fees, Percent Change
Net interest revenue
Interest Income (Expense), Net, Percent Change
Interest Income (Expense), Net, Percent Change
Investment product fees
Other revenues
Noninterest Income, Other Operating Income, Percent Change
Noninterest Income, Other Operating Income, Percent Change
Derivative [Table]
Derivative [Table]
Derivative [Line Items]
Derivative [Line Items]
Pledged collateral from interest rate swap counterparty, aggregate fair value
Pledged Collateral From Interest Rate Swap Counterparty, Aggregate Fair Value
The aggregate fair value of assets pledged from the counterparty, at the end of the reporting period, as collateral for outstanding interest rate swap derivative instruments.
Pledged collateral to interest rate swap counterparty, aggregate fair value
Pledged Collateral To Interest Rate Swap Counterparty, Aggregate Fair Value
The aggregate fair value of assets pledged to the counterparty, at the end of the reporting period, as collateral for outstanding interest rate swap derivative instruments.
Summary of the Activity in Exit Liabilities During the Period
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Summary of the Cumulative Amount of Acquisition-Related Exit Costs
Restructuring and Related Costs [Table Text Block]
Cash and Investments Segregated and on Deposit for Regulatory Purposes
Cash and Investments Segregated and on Deposit for Regulatory Purposes
Restricted Assets Disclosure [Text Block]
2019 Notes [Member]
2022 Notes [Member]
2025 Notes [Member]
2027 Notes [Member]
Description of basis spread on variable rate
Debt Instrument, Description of Variable Rate Basis
Basis spread on variable rate, percentage
Derivative, Basis Spread on Variable Rate
Weighted-average effective interest rate
Debt, Weighted Average Interest Rate
Revenue Recognition
Revenue from Contract with Customer [Text Block]
Investments segregated for regulatory purposes [Member]
Investments Segregated For Regulatory Purposes [Member]
Investments Segregated For Regulatory Purposes [Member]
Receivable from brokers, dealers and clearing organizations [Member]
Receivable From Broker Dealer [Member]
Receivable From Broker Dealer [Member]
Other assets [Member]
Payable to brokers, dealers and clearing organizations [Member]
Payable To Broker Dealer [Member]
Payable To Broker Dealer [Member]
Securities sold under agreements to repurchase [Member]
Offsetting Securities Purchased under Agreements to Resell [Abstract]
Offsetting Securities Purchased under Agreements to Resell [Abstract]
Reverse repurchase agreements, gross
Securities Purchased under Agreements to Resell, Gross
Reverse repurchase agreements, gross amounts offset in the balance sheet
Securities Purchased under Agreements to Resell, Liability
Reverse repurchase agreements, net amounts presented in the balance sheet
Securities Purchased under Agreements to Resell
Reverse repurchase agreements, gross amounts not offset in the balance sheet, financial instruments
Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Cash
Reverse repurchase agreements, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities
Reverse repurchase agreements, net amount
Securities Purchased under Agreements to Resell, Amount Offset Against Collateral
Offsetting Securities Borrowed [Abstract]
Offsetting Securities Borrowed [Abstract]
Deposits paid for securities borrowed, gross
Securities Borrowed, Gross
Deposits paid for securities borrowed, gross amounts offset in the balance sheet
Securities Borrowed, Liability
Deposits paid for securities borrowed, net amounts presented in the balance sheet
Securities Borrowed
Deposits paid for securities borrowed, gross amounts not offset in the balance sheet, financial instruments
Securities Borrowed, Collateral, Obligation to Return Cash
Deposits paid for securities borrowed, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Securities Borrowed, Collateral, Obligation to Return Securities
Deposits paid for securities borrowed, net amount
Securities Borrowed, Amount Offset Against Collateral
Offsetting Derivative Assets [Abstract]
Offsetting Derivative Assets [Abstract]
Pay-variable interest rate swaps, gross
Derivative Asset, Fair Value, Gross Asset
Pay-variable interest rate swaps, gross amounts offset in the balance sheet
Derivative Asset, Fair Value, Gross Liability
Pay-variable interest rate swaps, net amounts presented in the balance sheet
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Pay-variable interest rate swaps, gross amounts not offset in the balance sheet, financial instruments
Derivative, Collateral, Obligation to Return Cash
Pay-variable interest rate swaps, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Derivative, Collateral, Obligation to Return Securities
Pay-variable interest rate swaps, net amount
Derivative Asset, Fair Value, Amount Offset Against Collateral
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Total recognized assets, gross
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross
Total recognized assets, gross amounts offset in the balance sheet
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability
Total recognized assets, net amounts presented in the balance sheet
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed
Total recognized assets, gross amounts not offset in the balance sheet, financial instruments
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Cash
Total recognized assets, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Securities
Total recognized assets, net amount
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Amount Offset Against Collateral
Offsetting Securities Loaned [Abstract]
Offsetting Securities Loaned [Abstract]
Deposits received for securities loaned, gross amounts offset in the balance sheet
Securities Loaned, Asset
Deposits received for securities loaned, net amounts presented in the balance sheet
Securities Loaned
Deposits received for securities loaned, gross amounts not offset in the balance sheet, financial instruments
Securities Loaned, Collateral, Right to Reclaim Cash
Deposits received for securities loaned, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Securities Loaned, Collateral, Right to Reclaim Securities
Deposits received for securities loaned, net amount
Securities Loaned, Amount Offset Against Collateral
Securities Sold under Agreements to Repurchase [Abstract]
Securities Sold under Agreements to Repurchase [Abstract]
Securities sold under agreements to repurchase, gross
Securities Sold under Agreements to Repurchase, Gross
Securities sold under agreements to repurchase, gross amounts offset in the balance sheet
Securities Sold under Agreements to Repurchase, Asset
Securities sold under agreements to repurchase, net amounts presented in the balance sheet
Securities Sold under Agreements to Repurchase
Securities sold under agreements to repurchase, gross amounts not offset in the balance sheet, financial instruments
Securities sold under agreements to repurchase, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities1
Amount of right to receive securities collateral under master netting arrangements that have not been offset against securities sold under agreement to repurchase; this concept is appropriate for debit or credit balances.
Securities sold under agreements to repurchase, net amount
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral
Offsetting Derivative Liabilities [Abstract]
Offsetting Derivative Liabilities [Abstract]
Pay-variable rate interest rate swaps, gross
Derivative Liability, Fair Value, Gross Liability
Pay-variable rate interest rate swaps, gross amounts offset in the balance sheet
Derivative Liability, Fair Value, Gross Asset
Pay-variable rate interest rate swaps, net amounts presented in the balance sheet
Derivative Liability, Fair Value, Amount Not Offset Against Collateral
Pay-variable rate interest rate swaps, gross amounts not offset in the balance sheet, financial instruments
Derivative, Collateral, Right to Reclaim Cash
Pay-variable rate interest rate swaps, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Derivative, Collateral, Right to Reclaim Securities
Pay-variable rate interest rate swaps, net amount
Derivative Liability, Fair Value, Amount Offset Against Collateral
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
Total recognized liabilities, gross
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross
Total recognized liabilities, gross amounts offset in the balance sheet
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset
Total recognized liabilities, net amounts presented in the balance sheet
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned
Total recognized liabilities, gross amounts not offset in the balance sheet, financial instruments
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Cash
Total recognized liabilities, gross amounts not offset in the balance sheet, collateral received or pledged (including cash)
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Securities
Total recognized liabilities, net amount
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Amount Offset Against Collateral
Income Tax Contingency [Table]
Income Tax Contingency [Table]
Tax Reform [Axis]
Tax Reform [Axis]
Tax Reform [Axis]
Tax Reform [Domain]
Tax Reform [Domain]
[Domain] for Tax Reform [Axis]
Pre-Tax Cuts and Jobs Act [Member]
Pre-Tax Cuts and Jobs Act [Member]
Effective income tax rate, pre-Tax Cuts and Jobs Act, which was enacted December 22, 2017.
Post-Tax Cuts and Jobs Act [Member]
Post-Tax Cuts and Jobs Act [Member]
Effective income tax rate, post-Tax Cuts and Jobs Act, which was enacted December 22, 2017.
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Net favorable resolutions of state income tax matters
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount
Favorable tax benefits for federal incentives
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount
Net favorable per share impact on earnings
Effective Income Tax Rate Reconciliation, Earnings Per Share Impact
Effective Income Tax Rate Reconciliation, Earnings Per Share Impact
Estimated net favorable deferred income tax adjustment related to Tax Cuts and Jobs Act
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount
Favorable benefit resulting from selectively accelerating certain deductions to leverage higher 2017 tax rates
Effective Income Tax Rate Reconciliation, Acquisition Related Exit Costs, Amount
Effective Income Tax Rate Reconciliation, Acquisition-Related Exit Costs, Amount
Unfavorable remeasurement of uncertain tax positions related to federal incentives
Effective Income Tax Rate Reconciliation, Federal Incentives, Amount
Effective Income Tax Rate Reconciliation, Federal Incentives, Amount
U.S. federal corporate income tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Other Expense [Member]
Other Expense [Member]
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Stock-based compensation
Share-based Compensation
Provision for doubtful accounts on client and other receivables
Provision for Doubtful Accounts
Other, net
Other Noncash Income (Expense)
Changes in operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Investments segregated and on deposit for regulatory purposes
Increase (Decrease) in Restricted Investments for Operating Activities
Receivable from brokers, dealers and clearing organizations
Increase (Decrease) in Receivables from Brokers-Dealers and Clearing Organizations
Receivable from clients, net
Increase (Decrease) in Accounts Receivable
Receivable from/payable to affiliates, net
Increase Decrease In Due From Due To Affiliates Net
The net change in receivable from/payable to affiliates, net during the reporting period.
Other receivables, net
Increase (Decrease) in Other Receivables
Securities owned, at fair value
Increase (Decrease) in Financial Instruments Used in Operating Activities
Other assets
Increase (Decrease) in Other Operating Assets
Payable to brokers, dealers and clearing organizations
Increase (Decrease) in Payables to Broker-Dealers and Clearing Organizations
Payable to clients
Increase (Decrease) in Payables to Customers
Accounts payable and other liabilities
Increase (Decrease) in Accounts Payable and Other Operating Liabilities
Net cash provided by (used in) operating activities
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchase of property and equipment
Payments to Acquire Property, Plant, and Equipment
Proceeds from sale of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
Cash paid in business acquisition
Payments to Acquire Businesses, Net of Cash Acquired
Purchase of investments available-for-sale, at fair value
Payments to Acquire Debt Securities, Available-for-sale
Proceeds from sale of investments available-for-sale, at fair value
Proceeds from Sale of Debt Securities, Available-for-sale
Purchase of other investments
Payments to Acquire Other Investments
Proceeds from sale of other investments
Proceeds from Sale and Maturity of Other Investments
Proceeds from sale and maturity of short-term investments
Proceeds from Sale, Maturity and Collection of Short-term Investments
Net cash provided by (used in) investing activities
Net Cash Provided by (Used in) Investing Activities
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from issuance of long-term debt
Proceeds from Issuance of Long-term Debt
Payment of debt issuance costs
Payments of Debt Issuance Costs
Net proceeds from (repayments of) secured uncommitted lines of credit
Proceeds from (Repayments of) Short-term Debt, Maturing in Three Months or Less
Net proceeds from (repayments of) securities sold under agreements to repurchase
Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase
Proceeds from senior revolving credit facilities
Proceeds from Long-term Lines of Credit
Principal payments on senior revolving credit facilities
Repayments of Long-term Lines of Credit
Payment of cash dividends
Payments of Ordinary Dividends, Common Stock
Purchase of treasury stock
Payments for Repurchase of Common Stock
Purchase of treasury stock for income tax withholding on stock-based compensation
Payments Related to Tax Withholding for Share-based Compensation
Payment for future treasury stock purchases under accelerated stock repurchase agreement
Payments For Future Repurchase Of Common Stock Under Accelerated Stock Repurchase Agreement
Payments For Future Repurchase Of Common Stock Under Accelerated Stock Repurchase Agreement
Other
Proceeds from (Payments for) Other Financing Activities
Net cash provided by (used in) financing activities
Net Cash Provided by (Used in) Financing Activities
Net increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period
Supplemental cash flow information:
Supplemental Cash Flow Information [Abstract]
Interest paid
Interest Paid, Excluding Capitalized Interest, Operating Activities
Income taxes paid
Income Taxes Paid, Net
Schedule of Related Party Transactions
Schedule of Related Party Transactions [Table Text Block]
Summary of Collateral Available, Loaned or Repledged
Schedule of Customer Securities for which Entity has Right to Sell or Repledge [Table Text Block]
Summary of Cash Deposited with and Securities Pledged to Clearinghouses
Schedule Of Cash Deposits With And Securities Pledged To Clearinghouses Table [Text Block]
Schedule of cash deposits with and securities pledged to clearinghouses.
Exit Liabilities
Restructuring and Related Activities Disclosure [Text Block]
Senior Notes Due 2021 And 2024 [Member]
Senior Notes Due 2021 And 2024 [Member]
Senior Notes Due 2021 And 2024 [Member]
Line of Credit [Member]
Line of Credit [Member]
Debt instrument, redemption price, percentage
Debt Instrument, Redemption Price, Percentage
Debt instrument, redemption price, basis spread on US treasury rate
Debt Instrument, Redemption Price, Basis Spread On US Treasury Rate
Percentage points added to the U.S. Treasury rate to assist in computation of the debt instrument redemption price.
Number of unaffiliated banks
Debt Instrument, Number Of Unaffiliated Banks
Debt Instrument, Number Of Unaffiliated Banks
Borrowings outstanding
Debt instrument, effective interest rate
Debt Instrument, Interest Rate, Effective Percentage
Investments available-for-sale:
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax [Abstract]
Unrealized gain (loss), before tax
Unrealized gain (loss), tax effect
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax
Unrealized gain (loss), net of tax
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax
Reclassification adjustment for realized losses included in net income, before tax
Reclassification adjustment for realized losses included in net income, tax effect
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax
Reclassification adjustment for realized losses included in net income, net of tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax
Net change in investments available-for-sale, tax effect
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent
Net change in investments available-for-sale, net of tax
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent
Cash flow hedging instruments:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Reclassification adjustment for portion of realized loss amortized to net income, before tax
Reclassification adjustment for portion of realized loss amortized to net income, tax effect
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax
Reclassification adjustment for portion of realized loss amortized to net income, net of tax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax
Net change in cash flow hedging instruments, before tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent
Net change in cash flow hedging instruments, tax effect
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent
Net change in cash flow hedging instruments, net of tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent
Income tax effect
Contingencies And Commitments [Table]
Contingencies And Commitments [Table]
Contingencies And Commitments [Table]
Litigation Status [Axis]
Litigation Status [Axis]
Litigation Status [Domain]
Litigation Status [Domain]
Ciuffitelli Class Action [Member]
Ciuffitelli Class Action [Member]
Ciuffitelli Class Action [Member]
Non Class Action Lawsuits [Member]
Non Class Action Lawsuits [Member]
Non Class Action Lawsuits [Member]
FINRA Arbitration [Member]
FINRA Arbitration [Member]
FINRA Arbitration [Member]
Scottrade, Inc. [Member]
Scottrade, Inc. [Member]
Scottrade, Inc. [Member]
Litigation Case [Axis]
Litigation Case [Axis]
Litigation Case [Domain]
Litigation Case [Domain]
Aequitas Securities Litigation [Member]
Aequitas Securities Litigation [Member]
Aequitas Securities Litigation [Member]
Order Routing Matters [Member]
Order Routing Matters [Member]
Order Routing Matters [Member]
Contingencies and Commitments [Line Items]
Contingencies And Commitments [Line Items]
Contingencies And Commitments [Line Items]
Number of claims previously filed
Loss Contingency, Claims Previously Filed, Number
Loss Contingency, Claims Previously Filed, Number
Number of claims dismissed
Loss Contingency, Claims Dismissed, Number
Number of pending claims
Loss Contingency, Pending Claims, Number
Alleged amount of securities purchased by Company clients
Loss Contingency, Allegations, Amount of Securities Purchased
Loss Contingency, Allegations, Amount of Securities Purchased
Alleged number of investors involved in the claim (more than)
Loss Contingency, Allegations, Number of Investors Involved in the Claim
Loss Contingency, Allegations, Number of Investors Involved in the Claim
Alleged amount owed to investors
Loss Contingency, Allegations, Amount of Securities Owed to Investors
Loss Contingency, Allegations, Amount of Securities Owed to Investors
Number of plaintiffs
Loss Contingency, Number of Plaintiffs
Alleged plaintiff losses plus other damages
Loss Contingency, Estimate of Possible Loss
Preliminary settlement between plaintiffs and Tonkon Torp Defendant
Preliminary Settlement Between Plaintiffs And Tonkon Torp Defendent
Preliminary Settlement Between Plaintiffs And Tonkon Torp Defendent
Aggregate range of reasonably possible losses in excess of amounts accrued
Loss Contingency, Range of Possible Loss, Portion Not Accrued
Contingent liability for guarantees to securities clearinghouses and exchanges
Contingent Liability For Guarantees To Securities Clearinghouses And Exchanges
Contingent liability for guarantees to securities clearinghouses and exchanges.
Net Capital
Net Capital
Required Net Capital (2% of Aggregate Debit Balances)
Capital Requirement of Consolidated Broker-Dealer Subsidiary Electing Alternative Method
Net Capital in Excess of Required Net Capital
Alternative Excess Net Capital
Ratio of Net Capital to Aggregate Debit Balances
Ratio Of Net Capital To Aggregate Debit Balances
Ratio of net capital to aggregate debit balances.
Adjusted Net Capital
Net Capital under Commodity Exchange Act Computation
Required Adjusted Net Capital ($20 Million Plus 5% of All Foreign Exchange Liabilities Owed to Forex Clients in Excess of $10 Million)
Required Net Capital under Commodity Exchange Act
Adjusted Net Capital in Excess of Required Adjusted Net Capital
Net Capital Excess (Shortage) under Commodity Exchange Act
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash and Cash Equivalents Disclosure [Text Block]
Fair Value Disclosures
Fair Value Disclosures [Text Block]
Forward Contract Indexed to Issuer's Equity [Table]
Forward Contract Indexed to Issuer's Equity [Table]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Scenario, Forecast [Member]
Scenario, Forecast [Member]
Forward Contract Indexed to Issuer's Equity, Type [Axis]
Forward Contract Indexed to Issuer's Equity, Type [Axis]
Forward Contract Indexed to Issuer's Equity, Type [Domain]
Forward Contract Indexed to Issuer's Equity, Type [Domain]
Accelerated Stock Repurchase Agreement - Mar 2019 [Member]
Accelerated Stock Repurchase Agreement Three [Member]
Accelerated Stock Repurchase Agreement Three [Member]
Accelerated Stock Repurchase Agreement - Nov 2018 [Member]
Accelerated Stock Repurchase Agreement Two [Member]
Accelerated Stock Repurchase Agreement June 2016 [Member]
Accelerated Stock Repurchase Agreement - Sept 2018 [Member]
Accelerated Stock Repurchase Agreement One [Member]
Accelerated Stock Repurchase Agreement December 2015 [Member]
Forward Contract Indexed to Issuer's Equity [Line Items]
Forward Contract Indexed to Issuer's Equity [Line Items]
Prepayment of accelerated stock repurchase agreement
Prepayment Of Accelerated Stock Repurchase Agreement
Prepayment Of Accelerated Stock Repurchase Agreement
Initial delivery of shares repurchased under accelerated stock repurchase agreement (in shares)
Initial Delivery Of Shares Repurchased Under Accelerated Stock Repurchase Agreement
Initial Delivery Of Shares Repurchased Under Accelerated Stock Repurchase Agreement
Accelerated stock repurchase program, percentage of shares
Forward Contract Indexed To Issuers Equity Percentage Of Initial Shares Received
Forward Contract Indexed To Issuers Equity, Percentage Of Initial Shares Received
Accelerated stock repurchase program, initial price paid per share (in dollars per share)
Accelerated Share Repurchases, Initial Price Paid Per Share
Accelerated stock repurchase program, shares received upon settlement (in shares)
Forward Contract Indexed To Issuers Equity Shares Received Upon Settlement
Forward Contract Indexed To Issuers Equity, Shares Received Upon Settlement
Total shares repurchased under accelerated stock repurchase agreement (in shares)
Total Shares Repurchased Under Accelerated Stock Repurchase Agreement
Total Shares Repurchased Under Accelerated Stock Repurchase Agreement
Accelerated stock repurchase program, final price paid per share (in dollars per share)
Accelerated Share Repurchases, Final Price Paid Per Share